WO2011114412A1 - 無線通信システムの制御方法、無線通信システム、及び無線通信装置 - Google Patents
無線通信システムの制御方法、無線通信システム、及び無線通信装置 Download PDFInfo
- Publication number
- WO2011114412A1 WO2011114412A1 PCT/JP2010/007598 JP2010007598W WO2011114412A1 WO 2011114412 A1 WO2011114412 A1 WO 2011114412A1 JP 2010007598 W JP2010007598 W JP 2010007598W WO 2011114412 A1 WO2011114412 A1 WO 2011114412A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- setting
- reception
- transmission
- receiving
- Prior art date
Links
Images
Classifications
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0851—Joint weighting using training sequences or error signal
-
- 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
-
- 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
- H04B7/0619—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 using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
-
- 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
- H04B7/0619—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 using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0634—Antenna weights or vector/matrix coefficients
-
- 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
- H04B7/0665—Feed forward of transmit weights to the receiver
-
- 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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0862—Weighted combining receiver computing weights based on information from the transmitter
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
Definitions
- the present invention relates to a system for performing wireless communication by adaptively controlling a radio beam and a control method therefor.
- millimeter-wave wireless technology is expected to be applied particularly to high-definition image wireless transmission and gigabit-class high-speed data wireless communication (for example, see Non-Patent Documents 1, 2, and 3).
- millimeter waves with a high frequency have a strong straight-line property, and there are problems when assuming indoor wireless transmission.
- signal attenuation is significant due to the human body, etc., and if a person is present between the transmitter and the receiver in a room, transmission becomes difficult due to out-of-sight (shadowing) problem).
- This problem is due to the result of the propagation environment changing as the frequency increases and the straightness of radio waves becomes stronger, and is not limited to the millimeter wave band (30 GHz or higher).
- the frequency at which the radio wave propagation environment changes cannot be clearly specified, but it is said to be around 10 GHz.
- the power loss coefficient (power loss ⁇ ⁇ coefficients) representing the attenuation of radio waves with respect to the distance during propagation is 28-32 at 0.9-5.2 GHz in the office, at 60 GHz. Is 22. Since the free space loss is 20, it is considered that the influence of scattering and diffraction is small at a high frequency such as 60 GHz.
- a plurality of transmission paths are provided by installing a plurality of reception units in the reception apparatus, and one of the transmission paths between the transmission apparatus and the reception section is shielded.
- a system that continues transmission on the other transmission path is described in Patent Document 2.
- Patent Document 2 cannot be used when the vicinity of the transmission device is shielded or when a plurality of receiving units are shielded. Further, in the method described in Patent Document 3, it is necessary to request special consideration from the user, for example, it is necessary to install a reflector in consideration of the arrangement of the transmitter and the receiver.
- FIG. 31 is a diagram showing a configuration of a system using a wide-angle antenna
- FIG. 32 is a diagram showing an example of a delay profile in the room of the system using the wide-angle antenna as shown in FIG.
- the received power of the main wave that arrives first is the largest, as shown in FIG. Thereafter, delayed waves such as the second wave and the third wave arrive, but the received power is small.
- These second wave and third wave are reflected waves from the ceiling and the wall.
- This situation is significantly different from the propagation environment of radio waves with weak straightness such as the 2.4 GHz band used in, for example, a wireless LAN (Local Area Network).
- 2.4 GHz it is difficult to clearly separate the arrival directions of radio waves due to diffraction effects and multiple reflection.
- the arrival direction of the radio wave is relatively clear, but the number of delayed waves is limited and the reception level is small.
- the reception level is directed toward the direction of reflecting the narrow beam having a high directivity gain.
- beamforming (directivity control) technology that dynamically controls a narrow beam is indispensable in order to eliminate the need for special considerations regarding the presence or absence of shielding and the relative positions of the transmitter and receiver. It becomes.
- a typical example is a phased array antenna.
- a phased array antenna For millimeter waves with a short wavelength (for example, 5 mm at a frequency of 60 GHz), a phased array antenna can be realized in a small area, and phase shifter arrays and oscillator arrays have been developed for this purpose (for example, see Non-Patent Documents 3 and 4). ).
- directivity control can be realized even when an antenna such as a sector switching antenna or a mechanical direction movable antenna is used.
- a direction-of-arrival estimation technique is known as a technique different from the beam forming using the antenna array.
- the arrival direction estimation technique is a technique used in radar, sonar, propagation environment measurement, and the like, and is used for accurately estimating the arrival direction and power of radio waves received by an antenna array.
- an omni (omnidirectional) antenna is often used for the radio wave source.
- Non-Patent Document 6 shows such an example.
- the narrower the beam width the greater the search direction (step). For this reason, since it takes time to search for the beam direction and set the optimum beam direction, the transmission interruption time becomes long. Therefore, in such a case, a beam direction setting method that can shorten the transmission interruption time is strongly desired. Note that even a device capable of buffering data is not practical because a very large memory is required if the transmission interruption time becomes long.
- the characteristics of the propagation path between communication devices are expressed by a channel response matrix. If this channel response matrix is obtained, it is known that the best combination of transmitter and receiver antenna settings (hereinafter referred to as an antenna setting pair) is obtained using singular value decomposition (SVD: Single-Value Decomposition). .
- SVD singular value decomposition
- a unitary matrix for example, a Hadamard matrix
- a unitary matrix for example, a Hadamard matrix
- the training of the antenna array of the transmitter and the training of the antenna array of the receiver are repeated.
- a method for determining an optimal AWV array weight vector
- this method can shorten the time as compared with SVD, it takes a predetermined time to obtain an optimal AWV combination in order to repeatedly switch between transmission and reception.
- Non-Patent Document 5 discloses a technique for optimizing the beam direction (antenna setting) for transmission and reception while gradually increasing the beam resolution.
- it is necessary to measure the communication quality for a combination of a large number of transmission and reception beam directions (antenna settings) while repeatedly switching between transmission and reception, and a great deal of time is required to find the optimum beam combination. It was necessary.
- the pseudo omni pattern refers to a pattern having a substantially constant antenna gain over a very wide direction in the space around the transmitter / receiver, although it is not a complete omni (non-directional). Since it is often difficult to obtain a complete omni pattern in an antenna array, this pseudo omni pattern is often substituted. Furthermore, in the millimeter wave band, it may be difficult to obtain a good pseudo omni pattern.
- a good pseudo omni pattern refers to a wide or desired radiation pattern with sufficiently small antenna gain variation over an angular range.
- the inventors of the present application intend to acquire and store in advance an antenna setting pair corresponding to a propagation path that can be used for a plurality of communications by training, depending on the propagation environment and the characteristics of the antenna, the side lobe of the antenna I found out that it might be an obstacle.
- the inventors of the present application have also proposed a control method for a wireless communication system equipped with means for solving this problem in a past Japanese patent application (Japanese Patent Application No. 2008-282697: filed on Nov. 4, 2008). . This method is effective against two problems that can be induced by side lobes (difficulty in acquiring some antenna setting pairs and the appearance of antenna setting pairs due to side lobes).
- the present invention has been made in view of the above-described problems, and when performing wireless communication using beam forming, antenna setting pairs corresponding to propagation paths that can be used for a plurality of communications are acquired in advance by training.
- the purpose is to avoid one of the adverse effects of antenna side lobes (appearance of antenna setting pairs due to side lobes) in a simple manner when trying to stockpile. Note that the appearance of the antenna setting pair due to the side lobe, which is a problem of the present invention, will be described in detail in the embodiment.
- the method according to the first aspect of the present invention is a method for controlling a wireless communication system including first and second communication devices.
- the first communication device can control the transmission beam direction of the first transmission antenna by changing the transmission antenna setting, and can change the reception beam direction of the first reception antenna by changing the reception antenna setting. It is configured to be controllable.
- the second communication device can control the transmission beam direction of the second transmission antenna by changing the transmission antenna setting, and can control the reception beam direction of the second reception antenna by changing the reception antenna setting. It is configured to be able to.
- the method according to this aspect includes the following steps (a) to (f).
- a 2nd aspect of this invention is related with the radio
- the first communication device is configured to be able to transmit a radio signal from a first transmission antenna and to receive a radio signal by the first reception antenna.
- the second communication device is configured to transmit a radio signal from a second transmission antenna and to receive a radio signal by the second reception antenna.
- the first and second communication devices are configured to coordinately perform transmission and reception antenna setting candidate determination processing used for wireless communication.
- the determination process includes the following processes (a) to (f). (A): changing the antenna setting of the first transmitting antenna and the antenna setting of the second receiving antenna while changing the antenna setting of the first transmitting antenna and the antenna setting of the second receiving antenna.
- a third aspect of the present invention relates to a wireless communication apparatus that performs wireless communication with a counterpart apparatus.
- the wireless communication apparatus includes a transmission antenna setting control unit, a receiving antenna setting control unit, and a processing unit.
- the transmission antenna setting control unit controls the transmission beam direction of the first transmission antenna by changing the transmission antenna setting.
- the reception antenna setting control unit controls the reception beam direction of the first reception antenna by changing the reception antenna setting.
- the processing unit includes a combination of an antenna setting of the first transmission antenna and an antenna setting of a second reception antenna included in the counterpart device, and an antenna of the second transmission antenna included in the first reception antenna and the counterpart device.
- a setting combination priority determination process is performed in cooperation with the partner apparatus.
- the determination process includes the following processes (a) to (e).
- Steps (a) to (c) performed by using the first transmission antenna and the second reception antenna are performed using the antenna settings of the second transmission antenna and the first reception antenna.
- Obtaining similar priorities by performing for at least some of the possible combinations of antenna settings, and (e): based on the priorities obtained in (c) and (d) above, Determining a combination of antenna settings used for communication between the first and second communication devices;
- the radio communication system includes transceivers 400 and 500 having a directivity control antenna for beamforming.
- the directivity control mechanism of the directivity control antenna included in the transceivers 400 and 500 is not particularly limited.
- the directivity control antennas included in the transceivers 400 and 500 may be phased array antennas, sector switching antennas, or mechanical movable antennas.
- FIG. 2 shows an example of the configuration of a transceiver 400 having a phased array antenna as a directivity control antenna (excluding circuits unnecessary for explanation of operation).
- M transmitting radiating elements and N receiving radiating elements each constitute an antenna array.
- the transmitter 401 includes a transmission circuit 403, and data is input from the outside.
- the output of the transmission circuit 403 is M-branched and input to the antenna setting circuit 404.
- the antenna setting circuit 404 includes AWV (array weight vector) control circuits 404-1 to 404 -M.
- AWV array weight vector
- the AWV control circuits 404-1 to 404 -M can be realized by, for example, a serial connection of an analog phase shifter and a variable gain amplifier. In this case, both the amplitude and phase of the signal are continuously controlled.
- the AWV control circuits 404-1 to 404 -M are realized by digital phase shifters, only the signal phase is discretely controlled.
- the processing / arithmetic circuit 406 instructs the setting of the antenna setting circuit 404 through the control circuit 407.
- the direction and width of the beam emitted from the transmitter can be controlled by changing the amplitude and / or phase given to each signal.
- the receiver 402 has a configuration opposite to that of the transmitter 401.
- the signals received by the receiving antenna array composed of the radiating elements 411-1 to 41-N are combined after the amplitude and / or phase is adjusted by the AWV control circuits 410-1 to 410-N, and are combined via the receiving circuit 409 to the outside.
- Data is output to Similar to the transmitter 401, the processing / arithmetic circuit 406 controls the amplitude and / or phase of each of the AWV control circuits 410-1 to 410-N.
- FIG. 3 is a conceptual diagram of a wireless communication system including two transceivers (400 and 500) having the configuration shown in FIG.
- the transceiver 500 has K transmitting radiation elements and L receiving radiation elements.
- FIGS. 2 and 3 show configuration examples of a communication device equipped with a phased array antenna as a directivity control antenna, but communication devices equipped with other types of antennas as a directivity control antenna are also known.
- FIG. 4 is a configuration example of a transceiver 400 equipped with a sector switching antenna as a directivity control antenna. In this case, elements having strong directivities are used as the transmission radiating elements 415-1 to 415-1 and reception radiating elements 417-1 to 417-1 to 41-N, and the respective radiating elements are arranged in different directions.
- the antenna setting circuits 414 and 416 are usually composed of switch elements 414-1 to M and 416-1 to N. A beam is formed in the radiation direction of the radiating element with the switch turned on. Therefore, the beam direction can be controlled by changing the antenna setting by the antenna setting circuits 414 and 416.
- the operation of the other parts of the circuit is the same as in FIG.
- the transceiver 400 and the transceiver 500 perform training for optimizing the antenna setting circuits 404, 410, 504, and 510 provided therein.
- the processing / arithmetic circuit 406 or 506 or these two circuits cooperate to determine and acquire a plurality of antenna setting pair candidates (antenna setting pair list) based on the training result in S12.
- a method for determining a plurality of antenna setting pair candidates in S12 and S13 will be described later.
- the plurality of antenna setting pair candidates obtained are stored as data strings in the storage circuits 408 and 508 or one of them.
- the antenna setting pair means a combination of the antenna setting for the transmitting antenna and the antenna setting for the receiving antenna.
- the antenna setting may be setting information that defines the directivity pattern (beam direction, beam pattern) of the transmission antenna or the reception antenna.
- the antenna setting may be AWV.
- the antenna setting may be set to ON / OFF setting of the switch elements 414-1 to M and the like.
- the antenna setting may be an identification number associated with a specific directivity in advance, or may be an antenna setting value itself such as AWV that determines directivity.
- the antenna setting pair caused by the side lobe is determined from the plurality of antenna setting pair candidates acquired in S13. A method for discriminating the antenna setting pair caused by the side lobe in S14 will be described later. Subsequently, in S15, the antenna setting pair list is updated using the determination result in S14. Updating refers to excluding the antenna setting pair caused by the side lobe from the antenna setting pair list, or lowering the priority in the antenna setting pair list.
- one of a plurality of antenna setting pair candidates included in the antenna setting pair list updated in S15 is selected, and communication is started in S17.
- the method of selecting the antenna setting pair in S16 will also be described later.
- the transceivers 400 and 500 monitor the communication state. For example, when the transceiver 500 is operated for reception, the communication quality may be measured by the reception circuit 509 or the processing / arithmetic circuit 506.
- Communication quality includes, for example, reception level, signal power to noise power ratio (SNR), bit error rate (BER), packet error rate (PER), frame error rate. (FER: Frame Error Rate) etc. may be measured.
- the monitoring of the communication state in the transmitter / receiver 400 operated as the transmitter at this time may be performed by measuring the reception status of the communication quality degradation alarm from the transmitter / receiver 500 and the reception status of the reception confirmation response (ACK).
- ACK reception confirmation response
- the transceivers 400 and 500 are separated from the data strings (antenna setting pair list) recorded in the storage circuits 408 and 508 or one of them.
- the antenna setting pair is selected (S18).
- the quality of the communication quality may be determined, for example, by measuring the reception level, SNR, etc. in the reception circuit 509 or the processing / arithmetic circuit 506 when the transceiver 500 is operated to receive.
- the transceivers 400 and 500 return to the communication state (S17).
- the transceivers 400 and 500 transition to S18 and reselect the antenna setting pair.
- the communication quality is confirmed for all or a part of the antenna setting pairs included in the antenna setting pair list updated in S15, and as a result, the antennas having good communication quality.
- the configuration may be such that communication is resumed using the setting pair.
- FIG. 1 is a simplified sequence diagram briefly describing the operation of each communication device in each procedure described using the transition diagram of FIG. For simplification, the process corresponding to the communication quality confirmation (S19) in FIG. 5 is omitted in FIG. The operation at the time of communication quality deterioration including the communication quality confirmation (S19) will be described in detail later.
- the procedure and operation will be described in conjunction with the simplified sequence diagram of FIG. 1 and the configuration diagram of the wireless communication system of FIG.
- the transceiver 400 is represented as “communication device 1” and the transceiver 500 as “communication device 2” in FIG.
- FIGS. FIG. 8 shows a case where the training signal propagates from the communication device 1 toward the communication device 2, and FIG. 9 shows the opposite case.
- the communication device 1, the communication device 2, and the reflector 62 are installed in a room (two-dimensional) surrounded by a wall 61. Assume that there are five propagation paths 1 to 5 that can be used for communication between the communication apparatus 1 and the communication apparatus 2.
- Steps S102-1 and S102-2 in FIG. 1 include an antenna setting pair of the transmission antenna of the communication device 1 (transceiver 400) and the reception antenna of the communication device 2 (transceiver 500), and the reception antenna of the communication device 1. This is training for determining a plurality of antenna setting pairs for the transmission antenna of the communication device 2.
- a communication quality test is performed for a plurality of combinations of antenna setting candidates for the transmission antenna of the communication device 1 and antenna setting candidates for the reception antenna of the communication device 2.
- the storage circuit 408, the processing arithmetic circuit 406, the control circuit 407, and the antenna setting circuit 404 of the communication device 1 change the antenna setting of the transmission antenna (for example, the antenna array 405-1 to M) by interlocking with each other.
- the communication device 1 sequentially changes the main beam directions of the transmission antenna arrays 405-1 to 405-1-M.
- the transmission circuit 403 is also linked. Thereby, the communication device 1 transmits the training signal while sequentially changing the transmission main beam direction.
- the memory circuit 508, the processing arithmetic circuit 506, the control circuit 513, and the antenna setting circuit 510 of the communication device 2 change the antenna settings of the receiving antennas (for example, the antenna arrays 511-1 to 511-1) by interlocking with each other. .
- the communication device 2 sequentially changes the main beam directions of the reception antenna arrays 511-1 to 511-1 through 511-1.
- the receiving circuit 509 is also linked. Thereby, the communication device 2 receives the training signal while sequentially changing the reception main beam direction.
- the main beam direction of the transmission antenna of the communication device 1 and the main beam direction of the reception antenna of the communication device 2 are in good agreement with one of a plurality of propagation path directions existing between the communication devices, radiation from the transceiver 400 is performed.
- the trained signal arrives at the transmitter / receiver 500 through the propagation path, and good communication quality is obtained.
- the method for selecting a plurality of antenna setting candidates for each of the four antennas is not particularly limited.
- a method of selecting 32 antenna setting candidates for the transmission antenna of the communication device 1 and the reception antenna of the communication device 2 in advance will be described.
- Each antenna setting is distinguished by giving an antenna setting identification number (ID) 0 to 31.
- ID antenna setting identification number
- the thirty-two antenna setting candidates may be selected, for example, such that the main beam directions are arranged at equal angular intervals in the angle range to be covered by the communication device.
- “preliminarily” means that the beamforming training is selected before the training is started, and thus is not dependent on the propagation environment.
- the communication quality can be obtained for all combinations (here, 1024) of the 32 antenna setting candidates of the transmission antenna of the communication device 1 and the reception antenna of the communication device 2. If combinations of antenna setting candidates (antenna setting pairs) are arranged in the order of good communication quality, for example, a table as shown in FIG. 10 is obtained.
- the communication quality for example, an indicator such as a reception level, a signal power to noise power ratio (SNR), a bit error rate (BER) may be used.
- SNR signal power to noise power ratio
- BER bit error rate
- an appropriate threshold value is set for the communication quality, and antenna setting pairs that fall below the threshold value may be excluded from the list.
- the antenna setting pair list is as shown in FIG.
- the number of setting pairs to be stored in the antenna setting pair list may be determined in advance, and setting pairs having communication quality ranks exceeding the upper limit number of storage may be excluded from the list.
- both the communication quality threshold value and the stockpiling upper limit number are determined, and when the number of antenna setting pairs exceeding the communication quality threshold value exceeds the stockpiling upper limit number, setting pairs after the stockpiling upper limit number are excluded. Good.
- the antenna setting pair is not excluded, and FIG. 10 itself may be used as the antenna setting pair list.
- the communication quality is stored in the antenna setting pair list in order from the higher antenna setting pair.
- the antenna setting candidate for performing the communication quality test has a small interval in the main beam direction, a plurality of antenna setting pairs around one propagation path may have higher communication quality and may be added to the list.
- Such an antenna setting pair cannot be used at the same time when one propagation path is blocked by a shield or the like. Therefore, it is not appropriate to stockpile the antenna setting pair list.
- setting pairs to be stored in the antenna setting pair list may be determined by performing peak detection using information on the main beam direction of the antenna setting candidates. These processes may also be performed by the processing / arithmetic circuits 406 and 506.
- FIG. 10 and FIG. 11 The explanation accompanying FIG. 10 and FIG. 11 is a case where the effect does not appear because the level of the side lobe is sufficiently smaller than the main lobe.
- the situation shown in FIGS. 13A and 13B can occur. That is, the reception antenna of the communication device 2 having a relatively large side lobe level receives a signal radiated from the transmission antenna of the communication device 1 and propagated through the same path in the main lobe in a certain antenna setting (see FIG. 13A), in another antenna setting, reception is performed with side lobes (FIG. 13B).
- the communication quality when received by the side lobe may exceed the communication quality of the antenna setting pair in which the main lobe directions of both antennas correspond to the propagation path having a larger path loss.
- the propagation path shown in FIGS. 13A and 13B is a line-of-sight propagation path (LOS: Line-of-Sight) and there is a large difference in path loss from other non-line-of-sight propagation paths (NLOS: Non-Line-of-Sight).
- LOS Line-of-Sight
- NLOS Non-Line-of-Sight
- the antenna setting pair with the communication quality ranking of 4 is the setting pair due to the side lobe. If the antenna setting pair list is created based on the communication quality threshold value, it is as shown in FIG. Alternatively, if an antenna setting pair list is created based on the upper limit of stockpiling, the result is as shown in FIG.
- a plurality of antenna setting pairs corresponding to the same propagation path are stored in the list.
- the propagation path itself is the same, when one setting pair becomes unusable due to the blocking of the propagation path or the like, the other setting pair becomes unusable at the same time.
- the transition from S18 to S19 is wasted one time in the transition diagram of FIG. 5 and causes an increase in processing time. Therefore, the antenna setting pairs caused by the side lobes are low in value as the antenna setting pairs stored in the list, and are desirably excluded from the viewpoint of the beamforming processing time.
- a list is created based on the upper limit number of stockpiles as shown in FIG. 16, there is a possibility that a setting pair that should be stocked is excluded.
- step S104 the antenna setting pair caused by the side lobe is identified by the procedure described below. Looking at the antenna setting identification number in the antenna setting pair list (FIG. 11) when the influence of the side lobe does not appear, the same identification number is not included in each antenna. On the other hand, in the antenna setting pair list (FIGS. 15 and 16) when the influence of the side lobe appears, the side opposite to the antenna (in this case, the receiving antenna of the communication device 2) that has transmitted or received the side lobe. The same identification number is included in the identification number of the antenna of the communication device (in this case, the transmission antenna of the communication device 1). Of the plurality of antenna setting pairs including the same identification number, the one having the highest communication quality rank can be identified as the antenna setting pair due to the side lobe. These processes may be performed by the processing / arithmetic circuits 406 and 506.
- the antenna setting pair list is updated based on the identification result in S104.
- the antenna setting pair list of FIG. 15 created based on the communication quality threshold
- the setting pair identified as the side lobe origin may be excluded from the list and updated as shown in FIG.
- the priority of the setting pair identified as the side lobe origin may be lowered and updated as shown in FIG.
- the antenna setting pair list of FIG. 16 created based on the upper limit number of stockpiling, the setting pairs that should be stocked may be excluded as described above. Therefore, the table in which the antenna setting pairs in FIG.
- the updated antenna setting pair list may be stored in the storage circuits 408 and 508.
- the communication device 1 and the communication device 2 select one antenna setting pair from the antenna setting pair list updated in S105, set it in the antenna setting circuits 404, 410, 510, and 504 (S106), and perform communication. Start (S107).
- the antenna setting pair may be selected usually with the best communication quality.
- the communication device 1 and the communication device 2 are different from the antenna setting pairs stored in the storage devices 408 and 508.
- a setting pair is selected and communication is resumed (S111).
- the antenna setting pair may be selected, for example, in the order of storing the antenna setting pair, that is, in the order of communication quality.
- S108 to S109 shown in FIG. 1 show a case where the communication quality deteriorates when the communication device 1 is in the transmission state and the communication device 2 is in the reception state.
- the roles of the communication device 1 and the communication device 2 may be switched and the same processing may be performed.
- 19A and 19B are sequence diagrams showing in more detail the procedure from the training start (S101) to the communication start (S107) in the simplified sequence diagram of FIG. Below, operation
- Steps S602 to S613 show in detail an example of the procedure of steps S102 and S103 in FIG.
- steps S602 to S606 training (communication quality test) is performed on all combinations of a plurality of combinations between the antenna setting candidate of the transmission antenna of the communication device 1 and the antenna setting candidate of the reception antenna of the communication device 2.
- the communication device 1 sets the first antenna setting among the transmission antenna setting candidates (S602-1) and transmits a training signal (S604-1).
- the communication device 2 repeats reception of training signals (S604-2) while sequentially setting reception antenna settings as setting candidates (S603-2) until signal reception with all antenna setting candidates is completed (S605-2). 2).
- the above procedure is repeated until all the transmission antenna setting candidates of the communication device 1 are completed (S606-1).
- the communication device 2 creates an antenna setting pair list related to the transmission antenna of the communication device 1 and the reception antenna of the communication device 2 based on the reception result in S604-2 (S607-2).
- steps S608 to S612 training (communication quality test) is performed on all combinations of a plurality of combinations between the antenna setting candidate of the transmission antenna of the communication device 2 and the antenna setting candidate of the reception antenna of the communication device 1. . Since this process is the same as the operation in which the roles of the communication device 1 and the communication device 2 are exchanged in the above-described steps S602 to S606, the description thereof will be omitted.
- the communication device 1 Based on the reception result in S610-1, the communication device 1 creates an antenna setting pair list regarding the transmission antenna of the communication device 2 and the reception antenna of the communication device 1 (S613-1).
- the transmission beam direction is changed during training signal transmission in S604-1 and S610-2.
- Information should be sent along with the training signal.
- a separate frame for sending information on the transmission beam direction may be prepared and sent.
- information on the number of antenna setting candidates of the other communication device may be acquired.
- such information may be exchanged between S601 and S602.
- step S614 the antenna setting pair caused by the side lobe is discriminated by the method described above.
- the side lobe-caused antenna setting pair relating to the transmission antenna of the communication device 1 and the reception antenna of the communication device 2 is determined by the communication device 2 (S614-2), and the transmission antenna of the communication device 2 and the reception antenna of the communication device 1 are determined.
- the communication device 1 determines the side lobe-caused antenna setting pair (S614-1).
- the antenna setting pair list is updated to reflect the determination result of the side lobe-caused antenna setting pair in S614.
- the update of the antenna setting pair list refers to a measure such as deleting the side lobe-derived antenna setting pair from the antenna setting pair list or lowering the priority of the side lobe-derived antenna setting pair in the antenna setting pair list.
- the antenna setting pair list for the transmission antenna of the communication device 1 and the reception antenna of the communication device 2 is updated by the communication device 2 (S615-2), and the transmission antenna of the communication device 2 and the communication device 1 are updated.
- the communication device 1 updates the antenna setting pair list related to the receiving antenna (S615-1).
- the antenna setting pair list updated in S615 is transmitted and received.
- an antenna setting pair list regarding the transmission antenna of the communication device 2 and the reception antenna of the communication device 1 is sent from the communication device 1 to the communication device 2.
- the antenna setting pair list regarding the transmission antenna of the communication device 1 and the reception antenna of the communication device 2 is sent from the communication device 2 to the communication device 1.
- the antenna setting pair number used in the subsequent communication is shared between the two communication devices.
- the antenna setting pair number is sent from the communication device 1 to the communication device 2.
- the antenna setting pair number may be anything that can identify each antenna setting pair included in the antenna setting pair list.
- the communication quality rank number in FIGS. 17 and 18 may be used.
- the antenna setting identification number itself may be sent instead of the antenna setting pair number.
- antenna setting is performed according to the antenna setting pair number shared in S618, and communication is started in S620.
- FIG. 20 is a sequence diagram showing operations of the transceivers 400 and 500 in the transition process from S17 to S19 in FIG.
- the transceiver 400 (communication device 1 in FIG. 20) is performing a transmission operation
- the transceiver 500 (communication device 2 in FIG. 20) is performing a reception operation
- the transceiver 500 during reception operation detects that communication quality has deteriorated (S702-2), and notifies the transceiver 400 (S703-2).
- the transmitter / receiver 400 during the transmission operation receives a communication quality degradation notification from the transmitter / receiver 500 or receives an ACK signal transmitted from the transmitter / receiver 500 through normal communication when data reception is successful. Recognize that there was an interruption (or worsening of communication status).
- the transceivers 400 and 500 each acquire the antenna setting of the next candidate from the respective database (antenna setting pair list) (S704-1, 2).
- step S705-1 the transceiver 400 sets the antenna setting of the next candidate in the antenna setting circuit 404.
- step S705-2 the transceiver 500 sets the antenna setting of the next candidate in the antenna setting circuit 510.
- the transceivers 400 and 500 resume communication (S706-1, 2).
- the transceiver 500 confirms the communication quality (S707-2). If the communication quality is good, the communication is continued. If the communication quality is not good, an antenna setting change notification is sent (S708-2).
- the transmitter / receiver 400 continues the communication as it is except when the antenna setting change notification is received or when the ACK signal cannot be received from the transmitter / receiver 500 (S709-1).
- the transceivers 400 and 500 try to communicate with the next candidate (S710-1, 2). If any of the antenna setting pair candidates recorded in the storage circuits 408 and 508 does not improve the communication quality and there is no next candidate, the transceivers 400 and 500 return to training.
- the antenna side One of the adverse effects of lobes can be avoided by a simple method.
- the identification of the antenna setting pair due to the side lobe in the present embodiment can be performed without sending a training signal, so that the antenna setting pair list can be improved without greatly increasing the training time.
- a propagation path that can be used for wireless communication is limited. That is, direct waves and reflected waves from specific objects such as walls, windows, and fixtures. Therefore, the angle to be radiated or the angle to be received in each propagation path is greatly different depending on each wave (signal).
- a propagation path with low rectilinearity such as a 2.4 GHz microwave band, it is necessary to consider the effects of multiple scattering and diffraction. . For this reason, the situation differs between microwave communication and millimeter wave communication of approximately 10 GHz or more and microwave communication of approximately 2.4 GHz.
- the number of reflected waves other than direct waves is limited. Even when a specific direct wave or reflected wave is blocked by an obstacle (for example, a human body), the blocked specific wave and other waves are uncorrelated. Therefore, as described in the present embodiment, in the millimeter wave communication system, a spare beam direction can be secured while performing communication in a beam direction having the best communication state.
- the frequency is less than about 10 GHz, the contribution to the communication quality of multiple reflection and diffraction is large. Therefore, even if a directional antenna is used, the propagation state of the spare beam direction changes depending on the presence or absence of an obstacle. That is, there is a high possibility that the reception state from the spare beam direction, which is good when there is no obstacle, varies depending on the presence of the obstacle. Therefore, it is difficult to obtain the effect of the present invention in 2.4 GHz microwave communication or the like.
- FIGS. 30A and 30B a propagation path due to local reflection may be formed. This is shown in FIGS. 30A and 30B.
- FIG. 30A there are transceivers 81 and 82, and it is assumed that there are a direct wave A, a local reflected wave B, and a reflected wave C in a distant path as propagation paths in beam forming.
- the direct wave A and the locally reflected wave B are simultaneously blocked by, for example, shielding by the human body.
- Patent Document 1 discloses a technique in which priority is not given to a beam direction in the vicinity of a beam direction that has already been given priority, or the priority is lowered.
- the beam forming operation between the two communication devices has been described. Such an operation is often performed between two communication devices in a system including three or more communication devices.
- piconet coordinators and access points there are usually communicators with special privileges called piconet coordinators and access points.
- piconet coordinators and access points are usually communicators with special privileges called piconet coordinators and access points.
- which two communication devices perform the beam forming operation may be determined by a command from a communication device usually called a piconet coordinator or an access point.
- the piconet coordinator or access point may issue a command in response to a request from a general communication device.
- the same processing is performed by exchanging roles between two communication devices.
- which communication device performs which role first may be determined by a command from a communication device called a piconet coordinator or an access point, for example.
- a second embodiment of the present invention will be described with reference to the transition diagram shown in FIG.
- the configuration of the wireless communication system according to the present embodiment may be the same as that shown in FIG. 3, for example.
- the states of S11 to S13 and S16 to S19 in FIG. 6 and the transition conditions between them are the same as those in FIG. 5 described in the first embodiment. For this reason, detailed description regarding S11 to S13 and S16 to S19 is omitted.
- the sidelobe-caused antenna setting pair is determined (S14) and the antenna setting pair list is updated (S15).
- a transition is made from the communication continuing state (S17), and the sidelobe-caused antenna setting pair is discriminated (S20) and the antenna setting pair list is updated (S21).
- the processes of S20 and S21 may be appropriately executed during an idle period in which no transmission / reception data exists. You may divide
- communication is started using the antenna setting pair with the highest priority (the communication quality was the best), and the side lobe-caused antenna setting pair is determined using an idle period of communication, etc. And the antenna setting pair list is updated. For this reason, it is possible to shorten the time until the start of communication. Since there is no possibility that the antenna setting pair with the highest priority is caused by side lobes, there is no problem even if such a method is adopted.
- a third embodiment of the present invention will be described with reference to the transition diagram shown in FIG.
- the configuration of the wireless communication system according to the present embodiment may be the same as that shown in FIG. 3, for example. Further, the transition conditions between the states of S11 to S19 in FIG. 7 and between them (except for between S18 and S19) are the same as those of the same reference numerals in FIG. 5 described in the first embodiment. For this reason, detailed description regarding S11 to S19 is omitted.
- the next candidate antenna setting pair recorded in the antenna setting pair list is selected (S18), and fine adjustment is performed in that state (S18).
- This fine adjustment refers to a method of searching for an optimum beam (antenna setting) without taking time. Specifically, adjustment may be made so that the communication quality is improved by slightly changing the antenna setting to slightly change the beam direction. Further, a simplified beam search procedure such as “Beam Tracking” described in Patent Document 4 may be applied. Further, the same processing as the initial training may be performed around the beam direction corresponding to the newly selected antenna setting pair with a higher angular resolution than the initial training.
- the reception power when sequentially moving from an antenna setting pair corresponding to a large reception power to an antenna setting pair corresponding to a small reception power, the reception power gradually decreases, The accuracy may go down. Therefore, it is possible to find an antenna setting pair capable of high-accuracy and stable transmission by performing gain adjustment at the time of reception, for example, and performing fine adjustment in an optimal state in a state where reception power is reduced due to shielding. An effect is obtained.
- FIGS. 21A and 21B A fourth embodiment of the present invention will be described with reference to the sequence diagrams shown in FIGS. 21A and 21B.
- This sequence diagram is to be inserted between the start (S601) in FIG. 19A and A and B. After the process in FIG. 21B is completed, the processes after A and B in FIG. 19A may be executed.
- antenna setting candidates may be selected such that the main beam directions are arranged at equal angular intervals in the angle range to be covered by the communication device.
- “preliminarily” means that the beamforming training is selected before the training is started, and thus is not dependent on the propagation environment.
- usually a large number of antenna setting candidates for each antenna are required.
- steps S802 to S805 transmission / reception of a training signal for selecting antenna setting candidates of the transmission antenna of the communication device 1 according to the propagation environment is performed.
- the communication device 2 sets the receiving antenna setting to a value for a fixed pattern, here, a value for generating an omni or pseudo omni pattern (S802-2).
- the communication device 1 repeats the transmission of the training signal until the signal transmission with all the predetermined antenna settings is completed (S805-1) (S804-1). ).
- an identification number corresponding to each antenna setting or the equivalent is transmitted.
- the communication device 2 receives the training signal and the antenna setting identification number (S804-2).
- steps S806 to S809 a training signal is transmitted and received to select antenna setting candidates for the transmission antenna of the communication device 2. This is the same operation as that in which the roles of the communication device 1 and the communication device 2 are interchanged in the above-described steps S802 to S805, and thus description thereof is omitted.
- training signals are transmitted and received to select antenna setting candidates for the receiving antenna of the communication device 2 according to the propagation environment.
- the communication device 1 sets the transmission antenna setting to a value for a fixed pattern, here a value for generating an omni or pseudo omni pattern (S810-1), and sends a training signal (S812-1).
- the communication device 2 repeats the reception of the training signal (S812-2) until the signal reception with all the predetermined antenna settings is completed (S813-2). ).
- steps S814 to S817 transmission and reception of a training signal for selecting antenna setting candidates for the receiving antenna of the communication device 1 are performed.
- This step is the same as the operation in which the roles of the communication device 1 and the communication device 2 are exchanged in the above-described steps S810 to S813, and thus description thereof is omitted.
- reception results of four training signals were obtained.
- antenna setting candidates for four antennas are determined from these reception results. The specific procedure will be described below.
- a data string describing the relationship between the antenna setting of the transmission antenna of the communication device 1 (that is, the transmission beam direction) and the reception power at the reception antenna of the communication device 2 is acquired.
- the antenna setting of the transmission antenna of the communication device 1 is sent from the transmitter 1 to the transmitter 2 by adding it to the information element when transmitting the training signal in S804-1.
- the data string describing the relationship between the antenna setting and the received power is acquired, but received signal characteristics representing communication quality other than the received power may be used.
- the received signal characteristics other than the received power are, for example, signal power to noise power ratio (SNR).
- FIGS. 22 and 23 a two-dimensional propagation environment having four propagation paths as shown in FIGS. 22 and 23 will be described as an example.
- the main beam direction is scanned in increments of 4 ° in a 120 ° angle range when transmitting / receiving training signals while changing antenna settings in training.
- Each antenna setting is distinguished by giving an antenna setting identification number (ID) 0 to 30.
- ID antenna setting identification number
- FIG. 24 shows an example of the data string.
- the relationship between the identification number of the antenna setting of the communication device 1 (transceiver 400) and the relative received power in the communication device 2 (transceiver 500) is described.
- the relative received power is the maximum received power corresponding to all the antenna settings for which training has been performed, and the maximum received power is expressed as 0 dB, and the other received powers are expressed as ratios thereto.
- a plurality (or singular) of antenna settings whose relative received power exceeds a predetermined threshold is selected from this data string, and these are set as the transmission antennas of the communication device 1. What is necessary is just to make it an antenna setting candidate.
- the number of antenna settings to be detected may be determined in advance, and antenna settings from the higher relative reception power value to the set number may be detected.
- the antenna setting corresponding to the signal path cannot be detected correctly by the method as described above. That is, there is a possibility that the antenna setting in the peripheral direction of the beam direction corresponding to the high relative received power becomes the higher antenna setting of the relative received power and detected as the antenna setting corresponding to the signal path.
- peak detection may be performed using information on the beam direction (radiation angle) of the transmission antenna of the scanned transmitter 1. For this purpose, it is necessary to send information on the beam direction of the transmission antenna of the transmitter 1 from the transmitter 1 to the transmitter 2. This information may be sent in addition to the information element of the training signal in S804-1, or data for sending angle information may be sent separately.
- the data string in this case is, for example, as shown in FIG. If such a data string is used, a profile as shown in FIG. 26 can be created. If peak detection is performed using this profile, it is possible to correctly detect the antenna setting corresponding to the signal path. Also in this case, all the peaks may be detected, or the number of antenna settings to be detected is determined in advance, and the peak of the relative received power value up to the set number in order from the upper peak is detected. Good.
- the profile shown in FIG. 26 is for showing the concept, and actually a data string as shown in FIG. Further, when the identification number of the antenna setting is associated with the beam direction, peak detection may be performed without using the angle information.
- a plane (two-dimensional) propagation environment as shown in FIGS. 22 and 23 is considered. Therefore, the radial direction of the horizontal axis in FIG. 26 is also a one-dimensional quantity.
- the dimension of the antenna array is assumed to be one dimension.
- this embodiment can also be applied to a case where a two-dimensional antenna array is used in a three-dimensional propagation environment. In this case, the row of radiation angles in FIG. 25 and the horizontal axis in FIG. 26 form a two-dimensional array of two angles.
- antenna setting candidates are detected as shown in FIG. 27, for example. That is, the same number of antenna settings corresponding to the propagation paths that can be used for communication are detected as the number of propagation paths (four in this example).
- the profile shown in FIG. 26 may be as shown in FIG. That is, a peak due to the side lobe appears in the radiation direction where there is no propagation path.
- the direction in which the peak appears is the direction in which the main lobe faces when the side lobe faces the first propagation path direction. There is generally no propagation path in that direction.
- the antenna setting candidates in this case are as shown in FIG. 29, for example. That is, the antenna setting (identification number 17) due to the side lobe is mixed.
- the procedure for determining the antenna setting candidate for the transmission antenna of the communication device 2 using the training signal reception result in S808-1 is the same as that in S818-2 described above, and is therefore omitted. That is, the procedure of S818-2 may be executed by exchanging the roles of the communication device 1 and the communication device 2.
- the procedure for determining the antenna setting candidate for the receiving antenna of the communication device 1 using the training signal reception result in S816-1 is the same as that in S819-1, and will not be described. That is, the procedure of S819-2 may be executed by exchanging the roles of the communication device 1 and the communication device 2.
- antenna setting candidates for the four antennas are determined.
- the communication devices 1 and 2 perform transmission / reception of information necessary for performing brute force training (FIG. 19A) between the determined antenna setting candidates. That is, in S820, the total number of antenna setting candidates for the transmission antenna of communication device 2 and the antenna setting candidate for the reception antenna of communication device 1 is sent from communication device 1 to communication device 2. Similarly, in S821, the total number of antenna setting candidates for the transmission antenna of communication device 1 and the antenna setting candidate for the reception antenna of communication device 2 is sent from communication device 2 to communication device 1.
- the antenna setting candidate information of the transmission antenna may be an identification number of the determined antenna setting as shown in FIG. 29, for example.
- the antenna settings may be arranged in the order of the received power of the training signal as shown in FIG.
- FIGS. 19A and B are executed using the antenna setting candidates obtained as described above. As described above, even when the antenna setting due to the side lobe is included in the antenna setting candidates, by performing the steps shown in FIGS. 19A and 19B, the setting including the antenna setting due to the side lobe is performed from the antenna setting pair list. Pairs are excluded.
- the number of antenna setting candidates for each antenna can be reduced to a sufficiently small number by the process using the pseudo omni pattern shown in FIGS. 21A and 21B, and the processing time can be shortened.
- the fifth embodiment is characterized in that training and acquisition / setting of an antenna setting pair are performed at a low speed (narrow band), and actual communication is performed at a relatively high speed (wide band). Or part of the acquisition and setting of the training and antenna setting pair is performed at a low speed (narrow band), the rest of the acquisition and setting of the training and antenna setting pair and the actual communication are performed at a relatively high speed (broadband).
- the method described in any of the first to fourth embodiments may be used.
- the received power is expected to be small due to large free space propagation loss. For this reason, when the antenna is set to generate an omni or pseudo omni pattern during training, a sufficient carrier power to noise power ratio (CNR) may not be obtained. Therefore, by using a low speed (narrow band) with good reception sensitivity, it is possible to expect effects such as training and improvement in accuracy. Note that using a low speed (narrow band) here means narrowing the frequency band used for training signal transmission or adopting a modulation method with a small required CNR so that the noise bandwidth becomes small. means.
- “adopting a modulation scheme with a small required CNR” means, in other words, employing a modulation scheme with a large distance between signal points on a constellation (usually a low transmission rate).
- a narrow beam width is used, and since the correlation bandwidth is wide, there is a large change in the optimum beam combination (antenna setting pair) at low speed (narrow band) or high speed (wide band). Absent.
- the transceivers 400 and 500 are respectively connected to the transmitting antenna (405-1 to M or 505-1 to K) and the receiving antenna (411-1 to N or 511- 1 to L) are described.
- the transmitting antenna 405-1 to M or 505-1 to K
- the receiving antenna 411-1 to N or 511- 1 to L
- no particular assumption was made regarding the relationship between the distance between the transmission antennas 405-1 to M and the reception antennas 411-1 to 41-N of the transceiver 400 and the propagation path distance.
- no particular assumption has been made regarding the relationship between the distance between the transmission antennas 505-1 to 50-K and the reception antennas 511-1 to 511-1 of the transceiver 500 and the distance of the propagation path.
- the configuration of the transmitting antenna and the receiving antenna of each transceiver is generally different. In such a case, it is necessary to perform training between the transmission antenna of the communication device 1 and the reception antenna of the communication device 2 and between the reception antenna of the communication device 1 and the transmission antenna of the communication device 2.
- brute force training S602 to S607 between antenna setting candidates of the transmission antenna of the communication device 1 and the reception antenna of the communication device 2, and the antennas of the reception antenna of the communication device 1 and the transmission antenna of the communication device 2 It was necessary to perform brute force training (S608 to S613) between setting candidates separately.
- the transceivers 400 and 500 have only one antenna array and share one antenna array for transmission and reception by switching with a switch or the like, it will be described in the first to fifth embodiments.
- the amount of work required is reduced by approximately half. This is because the transmission antenna setting candidate (transmission beam direction) and the reception antenna setting candidate (reception beam direction) of the transceiver 400 can be regarded as the same.
- any one of the steps S602 to S607 and the steps S608 to S613 shown in FIG. 19A may be performed.
- the determination of the antenna setting pair due to the side lobe (S614) and the update of the antenna setting pair list (S615) shown in FIG. Just do it.
- the distance between the transmission antenna and the reception antenna of each communication device is sufficiently small compared to the distance of the propagation path,
- the work amount of the procedure described in the first to fifth embodiments is reduced to about half as described above.
- the term “communication quality” is used. If the communication quality is representative of the communication quality such as reception level, signal power to noise power ratio (SNR), bit error rate (BER), packet error rate (PER), frame error rate (FER), etc. Often, one or more of them may be used. In addition, for evaluation of communication quality, a specific data string in the preamble included in the transmission data string of the transmitter 401 or 501 may be used.
- SNR signal power to noise power ratio
- BER bit error rate
- PER packet error rate
- FER frame error rate
- control and calculation processing related to generation / switching of antenna setting candidates performed by the transceivers 400 and 500 according to the first to fifth embodiments described above are performed by a program for transceiver control on a computer such as a microprocessor. It can be realized by executing.
- the computer that executes the transceiver control program may execute the calculation and transmission / reception control steps shown in the sequence diagrams of FIGS. 19A and 19B and FIG.
- control and calculation processing related to generation / switching of antenna setting candidates performed by the transceiver 500 can be realized by causing a computer such as a microprocessor to execute a program for transceiver control.
- the computer that executes the transceiver control program may execute the calculation and transmission / reception control steps shown in the sequence diagrams of FIGS. 19A and 19B and FIG.
- Non-transitory computer readable media include various types of tangible storage media (tangible storage medium).
- non-transitory computer-readable media examples include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (random access memory)) are included.
- the program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
- the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
- the antenna setting circuits 404, 410, 504, 510 may be constituted by a digital filter or a computer such as a DSP.
- a control method of a wireless communication system including first and second communication devices,
- the first communication device can control the transmission beam direction of the first transmission antenna by changing the transmission antenna setting, and can control the reception beam direction of the first reception antenna by changing the reception antenna setting.
- the second communication device can control the transmission beam direction of the second transmission antenna by changing the transmission antenna setting, and can control the reception beam direction of the second reception antenna by changing the reception antenna setting.
- a similar data string is obtained, (F): a combination of the first transmitting antenna setting and the second receiving antenna setting described in the data string obtained in (d) and (e), and the first receiving antenna setting and the A method for controlling a wireless communication system, wherein at least a part of combinations of second transmission antenna settings is used for communication between the first and second communication devices.
- step (Appendix 4) The method of controlling a wireless communication system according to any one of supplementary notes 1 to 3, wherein the step (f) includes performing wireless communication using a combination of antenna setting candidates that are sequentially selected according to a rank in the data string. .
- the step (f) observes communication quality during communication, selects a combination of antenna settings of the next order according to the priority order according to deterioration of communication quality during communication, and selects the combination of selected antenna settings.
- (Appendix 6) The antenna setting used in the step (a) and the step corresponding to the step (a) in the step (e), (A1): While changing the antenna setting of the first transmission antenna, transmit a training signal from the first transmission antenna; (A2): With the fixed beam pattern set on the second receiving antenna, the training signal is received at the second receiving antenna; (A3): Based on the training signal reception result in step (a2), obtain a data string describing the relationship between the antenna setting of the first transmission antenna and the reception signal characteristic of the second reception antenna; (A4): using the data string, determine at least one first transmission antenna setting that is a candidate for communication of the first transmission antenna; (A5): Steps (a1) to (a4) performed using the first transmission antenna and the second reception antenna are performed for the combination of the second transmission antenna and the first reception antenna.
- determining at least one second transmission antenna setting that is a candidate for communication of the second transmission antenna (A6): With a fixed beam pattern set in the first transmission antenna, a training signal is transmitted from the first transmission antenna, (A7): While changing the antenna setting of the second receiving antenna, receiving the training signal at the second receiving antenna; (A8): Based on the reception result of the training signal in the step (a7), obtain a data string describing the relationship between the antenna setting of the second reception antenna and the reception signal characteristics; (A9): using the data string, determine at least one second receiving antenna setting that is a candidate for communication of the second receiving antenna; (A10): Steps (a6) to (a9) performed using the first transmission antenna and the second reception antenna are performed on the combination of the second transmission antenna and the first reception antenna. According to any one of appendices 1 to 5, characterized in that it is obtained by determining at least one first receiving antenna setting that is a candidate for communication of the first receiving antenna. A control method of the wireless communication system described.
- Appendix 7 The wireless communication system control method according to appendix 6, wherein the fixed beam pattern is an omni (omnidirectional) pattern or a pseudo omni (pseudo omnidirectional) pattern.
- a first communicator configured to transmit a radio signal from a first transmitting antenna and to receive a radio signal by the first receiving antenna;
- a second communicator configured to transmit a radio signal from the second transmitting antenna and to receive a radio signal by the second receiving antenna;
- a third means for arranging the combinations of the antenna settings in the data sequence in the order of good communication quality;
- a fourth means for updating the data string with respect to a combination of antenna settings with the same antenna setting of one antenna in the aligned data string;
- a wireless communication system comprising: sixth means for using at least a part of a combination of antenna settings for communication between the first and second communication devices.
- the sixth means observes communication quality during communication, selects a combination of antenna settings of the next order according to the priority according to the deterioration of the communication quality, and applies the selected combination of antenna settings.
- the antenna setting used in the step corresponding to the first means in the first means and the fifth means (A1): While changing the antenna setting of the first transmission antenna, transmit a training signal from the first transmission antenna; (A2): With the fixed beam pattern set on the second receiving antenna, the training signal is received at the second receiving antenna; (A3): Based on the training signal reception result in step (a2), obtain a data string describing the relationship between the antenna setting of the first transmission antenna and the reception signal characteristic of the second reception antenna; (A4): using the data string, determine at least one first transmission antenna setting that is a candidate for communication of the first transmission antenna; (A5): Steps (a1) to (a4) performed using the first transmission antenna and the second reception antenna are performed for the combination of the second transmission antenna and the first reception antenna.
- determining at least one second transmission antenna setting that is a candidate for communication of the second transmission antenna (A6): With a fixed beam pattern set in the first transmission antenna, a training signal is transmitted from the first transmission antenna, (A7): While changing the antenna setting of the second receiving antenna, receiving the training signal at the second receiving antenna; (A8): Based on the reception result of the training signal in the step (a7), obtain a data string describing the relationship between the antenna setting of the second reception antenna and the reception signal characteristics; (A9): using the data string, determine at least one second receiving antenna setting that is a candidate for communication of the second receiving antenna; (A10): Steps (a6) to (a9) performed using the first transmission antenna and the second reception antenna are performed on the combination of the second transmission antenna and the first reception antenna.
- any one of appendices 8 to 12 characterized in that it is obtained by determining at least one first receiving antenna setting that is a candidate for communication of the first receiving antenna.
- Appendix 14 The wireless communication system according to appendix 13, wherein the fixed beam pattern is an omni (omnidirectional) pattern or a pseudo omni (pseudo omnidirectional) pattern.
- a control method of a wireless communication system including first and second communication devices,
- the first communication device can control the transmission beam direction of the first transmission antenna by changing the transmission antenna setting, and can control the reception beam direction of the first reception antenna by changing the reception antenna setting.
- the second communication device can control the transmission beam direction of the second transmission antenna by changing the transmission antenna setting, and can control the reception beam direction of the second reception antenna by changing the reception antenna setting.
- Steps (a) to (c) performed by using the first transmission antenna and the second reception antenna are performed using the antenna settings of the second transmission antenna and the first reception antenna.
- a wireless communication device that performs wireless communication with a partner device, A transmission antenna setting control unit for controlling the transmission beam direction of the first transmission antenna by changing the transmission antenna setting; A receiving antenna setting control unit for controlling the receiving beam direction of the first receiving antenna by changing the receiving antenna setting; The combination of the antenna setting of the first transmitting antenna and the antenna setting of the second receiving antenna provided in the counterpart device, and the combination of the antenna setting of the second transmitting antenna provided in the first receiving antenna and the counterpart device A processing unit for performing a ranking determination process in cooperation with the counterpart device; With The determination process includes (A): While changing the antenna setting of the first transmitting antenna and the antenna setting of the second receiving antenna, the antenna setting of the first transmitting antenna and the antenna setting of the second receiving antenna are taken.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Radio Transmission System (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの前記アンテナ設定の全ての組み合わせ、もしくはその一部に関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信すること、
(b):前記ステップ(a)におけるトレーニング信号の受信結果に基づいて、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの前記アンテナ設定の全ての組み合わせ、もしくはその一部に関し、前記第2の受信アンテナの通信品質の関係を記述したデータ列を取得すること、
(c):前記データ列において、前記アンテナ設定の組み合わせを通信品質が良好な順に整列すること、
(d):前記整列を行ったデータ列において、一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせに関し、前記データ列の更新を行うこと、
(e):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(d)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せについて行うことにより、同様のデータ列を取得すること、
(f):前記(d)及び(e)において得られたデータ列に記述された前記第1の送信アンテナ設定と前記第2の受信アンテナ設定の組合せ、及び前記第1の受信アンテナ設定と前記第2の送信アンテナ設定の組合せ、あるいはその一部を、前記第1及び第2の通信機の間の通信に利用すること。
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの前記アンテナ設定の全ての組み合わせ、もしくはその一部に関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信すること、
(b):前記ステップ(a)におけるトレーニング信号の受信結果に基づいて、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの前記アンテナ設定の全ての組み合わせ、もしくはその一部に関し、前記第2の受信アンテナの通信品質の関係を記述したデータ列を取得すること、
(c):前記データ列において、前記アンテナ設定の組み合わせを通信品質が良好な順に整列すること、
(d):前記整列を行ったデータ列において、一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせに関し、前記データ列の更新を行うこと、
(e):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(d)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せについて行うことにより、同様のデータ列を取得すること、
(f):前記(d)及び(e)において得られたデータ列に記述された前記第1の送信アンテナ設定と前記第2の受信アンテナ設定の組合せ、及び前記第1の受信アンテナ設定と前記第2の送信アンテナ設定の組合せ、あるいはその一部を、前記第1及び第2の通信機の間の通信に利用すること。
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信すること、
(b):前記(a)におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質を取得すること、
(c):前記通信品質が良好なアンテナ設定の組合せの優先順位が相対的に高く、かつ、前記第1の送信アンテナ及び前記第2の受信アンテナのうち一方のアンテナのアンテナ設定が同一であるアンテナ設定の組合せ間では前記通信品質が第2位以降の優先順位が相対的に低くなるように、前記少なくとも一部の組合せに含まれる組合せ間での優先順位を決定すること、
(d):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(c)を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様の優先順位を取得すること、及び
(e):前記(c)及び(d)において得られた優先順位に基づいて、前記第1及び第2の通信機の間の通信に利用するアンテナ設定の組合せを決定すること。
本実施の形態にかかる無線通信システムは、ビームフォーミングのための指向性制御アンテナを有する送受信機400及び500を含む。送受信機400及び500が有する指向性制御アンテナの指向性制御機構は特に限定されない。例えば、送受信機400及び500が有する指向性制御アンテナは、フェーズドアレイアンテナ、セクタ切替アンテナ、又は機械式可動アンテナとしてもよい。
本発明における第2の実施の形態を、図6に示した遷移図を用いて説明する。なお本実施の形態に係る無線通信システムの構成は、例えば図3に示したものと同様とすればよい。図6のS11~S13、S16~S19の各状態とこれらの間での遷移条件は、第1の実施の形態で述べた図5の同一符号のものと同様である。このため、S11~S13、S16~S19に関する詳細な説明は省略する。
本発明における第3の実施の形態を、図7に示した遷移図を用いて説明する。本実施の形態にかかる無線通信システムの構成は、例えば図3に示したものと同様とすればよい。また、図7のS11~S19の各状態とこれらの間(S18~S19間を除く)での遷移条件は、第1の実施の形態で述べた図5の同一符号のものと同様である。このため、S11~S19に関する詳細な説明は省略する。
本発明における第4の実施の形態を、図21A及びBに示したシーケンス図を用いて説明する。本シーケンス図は、図19Aにおける開始(S601)とA及びBの間に挿入されるべきものであり、図21Bの工程終了後は、図19AにおけるA及びB以降の工程を実行すればよい。
第5の実施の形態では、トレーニング及びアンテナ設定対の取得・設定を低速(狭帯域)で行い、実際の通信は比較的高速(広帯域)で行うことを特徴とする。もしくは、トレーニング及びアンテナ設定対の取得・設定の一部を低速(狭帯域)で行い、トレーニング及びアンテナ設定対の取得・設定の残部、及び実際の通信を比較的高速(広帯域)で行うことを特徴とする。それ以外の動作は、第1~第4の実施の形態の何れかに記載の方法を用いればよい。
第1~5の実施の形態の記述においては、送受信機400及び500が、それぞれ送信アンテナ(405-1~M、又は505-1~K)と受信アンテナ(411-1~N、又は511-1~L)を両方具備する場合について述べた。また、送受信機400の送信アンテナ405-1~Mと受信アンテナ411-1~Nの間の距離と、伝搬路の距離の関係について特に仮定は置かなかった。同様に、送受信機500の送信アンテナ505-1~Kと受信アンテナ511-1~Lの間の距離と、伝搬路の距離の関係についても特に仮定は置かなかった。また、各送受信機の送信アンテナと受信アンテナの構成も、一般には異なる場合を扱った。そのような場合には、通信機1の送信アンテナと通信機2の受信アンテナ間、通信機1の受信アンテナと通信機2の送信アンテナ間、それぞれについてトレーニングを行う必要があった。例えば、図19Aにおいて、通信機1の送信アンテナと通信機2の受信アンテナのアンテナ設定候補間の総当りトレーニング(S602~S607)と、通信機1の受信アンテナと通信機2の送信アンテナのアンテナ設定候補間の総当りトレーニング(S608~S613)を別々に行う必要があった。
第1及び第2の通信機を含む無線通信システムの制御方法であって、
前記第1の通信機は、送信アンテナ設定を変更することによって第1の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第1の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記第2の通信機は、送信アンテナ設定を変更することによって第2の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第2の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記方法は、
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(b):前記(a)におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質の関係を記述したデータ列を取得し、
(c):前記データ列において、前記アンテナ設定の組み合わせを通信品質が良好な順に整列し、
(d):前記整列を行ったデータ列において、一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせに関し、前記データ列の更新を行い、
(e):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(d)を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様のデータ列を取得し、
(f):前記(d)及び(e)において得られたデータ列に記述された前記第1の送信アンテナ設定と前記第2の受信アンテナ設定の組合せ、及び前記第1の受信アンテナ設定と前記第2の送信アンテナ設定の組合せのうち少なくとも一部の組合せを、前記第1及び第2の通信機の間の通信に利用する無線通信システムの制御方法。
前記ステップ(d)における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、前記通信品質が2位以降の組み合わせを前記データ列から削除することにより行う、付記1記載の無線通信システムの制御方法。
前記ステップ(d)における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、前記通信品質が2位以降の組み合わせの前記データ列における順位を下げることにより行う、付記1記載の無線通信システムの制御方法。
前記ステップ(f)は、前記データ列内の順位に従って順次選択したアンテナ設定候補の組合せを用いて無線通信を行うことを備える付記1乃至3のいずれか1項に記載の無線通信システムの制御方法。
前記ステップ(f)は、通信中に通信品質を観測し、前記通信中の通信品質の悪化に応じて、前記優先順位に従って次順位のアンテナ設定の組合せを選択し、選択したアンテナ設定の組合せを適用して無線通信を行うことを備える付記4記載の無線通信システムの制御方法。
前記ステップ(a)、及び前記ステップ(e)中の前記ステップ(a)に相当するステップにおいて使用するアンテナ設定を、
(a1):前記第1の送信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナからトレーニング信号を送信し、
(a2):前記第2の受信アンテナに固定ビームパターンを設定した状態で、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a3):前記ステップ(a2)におけるトレーニング信号の受信結果に基づいて、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの受信信号特性の関係を記述したデータ列を取得し、
(a4):前記データ列を用いて、前記第1の送信アンテナの、通信に利用する候補となる少なくとも1つの第1の送信アンテナ設定を決定し、
(a5):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a1)乃至(a4)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せについて行うことにより、前記第2の送信アンテナの、通信に利用する候補となる少なくとも1つの第2の送信アンテナ設定を決定し、
(a6):前記第1の送信アンテナに固定ビームパターンを設定した状態で、前記第1の送信アンテナからトレーニング信号を送信し、
(a7):前記第2の受信アンテナのアンテナ設定を変更しながら、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a8):前記ステップ(a7)におけるトレーニング信号の受信結果に基づいて、前記第2の受信アンテナのアンテナ設定と受信信号特性の関係を記述したデータ列を取得し、
(a9):前記データ列を用いて、前記第2の受信アンテナの、通信に利用する候補となる少なくとも1つの第2の受信アンテナ設定を決定し、
(a10):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a6)乃至(a9)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せ、について行うことにより、前記第1の受信アンテナの、通信に利用する候補となる少なくとも1つの第1の受信アンテナ設定を決定することにより得ることを特徴とする、付記1乃至5のいずれか1項に記載の無線通信システムの制御方法。
前記固定ビームパターンがオムニ(無指向性)パターンもしくは擬似オムニ(擬似無指向性)パターンであることを特徴とする付記6記載の無線通信システムの制御方法。
第1の送信アンテナから無線信号を送信でき、第1の受信アンテナによって無線信号を受信できるよう構成された第1の通信機と、
第2の送信アンテナから無線信号を送信でき、第2の受信アンテナによって無線信号を受信できるよう構成された第2の通信機と、
前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信するための第1の手段と、
前記第1の手段におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質の関係を記述したデータ列を取得するための第2の手段と、
前記データ列において、前記アンテナ設定の組み合わせを通信品質が良好な順に整列するための第3の手段と、
前記整列を行ったデータ列において、一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせに関し、前記データ列の更新を行うための第4の手段と、
前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ第1乃至第4の手段を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様のデータ列を取得するための第5の手段と、
前記第4及び第5の手段において得られたデータ列に記述された前記第1の送信アンテナ設定と前記第2の受信アンテナ設定の組合せ、及び前記第1の受信アンテナ設定と前記第2の送信アンテナ設定の組合せのうち少なくとも一部の組合せを、前記第1及び第2の通信機の間の通信に利用するための第6の手段とを備える無線通信システム。
前記第4の手段における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、受信信号特性が2位以降の組み合わせを前記データ列から削除することにより行うことを特徴とする、付記8記載の無線通信システム。
前記第4の手段における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、受信信号特性が2位以降の組み合わせの前記データ列における順位を下げることを特徴とする、付記8記載の無線通信システム。
前記第6の手段は、前記データ列内の順位に従って順次選択したアンテナ設定候補の組合せを用いて無線通信を行うことを備える付記8乃至10のいずれか1項に記載の無線通信システム。
前記第6の手段は、通信中に通信品質を観測し、前記通信品質の悪化に応じて、前記優先順位に従って次順位のアンテナ設定の組合せを選択し、選択したアンテナ設定の組合せを適用して無線通信を行うことを備える付記11記載の無線通信システム。
前記第1の手段、及び前記第5の手段中の前記第1の手段に相当するステップにおいて使用するアンテナ設定を、
(a1):前記第1の送信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナからトレーニング信号を送信し、
(a2):前記第2の受信アンテナに固定ビームパターンを設定した状態で、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a3):前記ステップ(a2)におけるトレーニング信号の受信結果に基づいて、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの受信信号特性の関係を記述したデータ列を取得し、
(a4):前記データ列を用いて、前記第1の送信アンテナの、通信に利用する候補となる少なくとも1つの第1の送信アンテナ設定を決定し、
(a5):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a1)乃至(a4)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せについて行うことにより、前記第2の送信アンテナの、通信に利用する候補となる少なくとも1つの第2の送信アンテナ設定を決定し、
(a6):前記第1の送信アンテナに固定ビームパターンを設定した状態で、前記第1の送信アンテナからトレーニング信号を送信し、
(a7):前記第2の受信アンテナのアンテナ設定を変更しながら、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a8):前記ステップ(a7)におけるトレーニング信号の受信結果に基づいて、前記第2の受信アンテナのアンテナ設定と受信信号特性の関係を記述したデータ列を取得し、
(a9):前記データ列を用いて、前記第2の受信アンテナの、通信に利用する候補となる少なくとも1つの第2の受信アンテナ設定を決定し、
(a10):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a6)乃至(a9)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せ、について行うことにより、前記第1の受信アンテナの、通信に利用する候補となる少なくとも1つの第1の受信アンテナ設定を決定することにより得ることを特徴とする、付記8乃至12のいずれか1項に記載の無線通信システム。
前記固定ビームパターンがオムニ(無指向性)パターンもしくは擬似オムニ(擬似無指向性)パターンであることを特徴とする付記13記載の無線通信システム。
第1及び第2の通信機を含む無線通信システムの制御方法であって、
前記第1の通信機は、送信アンテナ設定を変更することによって第1の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第1の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記第2の通信機は、送信アンテナ設定を変更することによって第2の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第2の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記方法は、
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(b):前記(a)におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質を取得し、
(c):前記通信品質が良好なアンテナ設定の組合せの優先順位が相対的に高く、かつ、前記第1の送信アンテナ及び前記第2の受信アンテナのうち一方のアンテナのアンテナ設定が同一であるアンテナ設定の組合せ間では前記通信品質が第2位以降の優先順位が相対的に低くなるように、前記少なくとも一部の組合せに含まれる組合せ間での優先順位を決定し、
(d):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(c)を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様の優先順位を取得し、
(e):前記(d)及び(d)において得られた優先順位に基づいて、前記第1及び第2の通信機の間の通信に利用するアンテナ設定の組合せを決定する無線通信システムの制御方法。
相手装置との間で無線通信を行う無線通信装置であって、
送信アンテナ設定を変更することによって第1の送信アンテナの送信ビーム方向を制御する送信アンテナ設定制御部と、
受信アンテナ設定を変更することによって第1の受信アンテナの受信ビーム方向を制御する受信アンテナ設定制御部と、
前記第1の送信アンテナのアンテナ設定と相手装置が備える第2の受信アンテナのアンテナ設定の組合せ、及び前記第1の受信アンテナと前記相手装置が備える第2の送信アンテナのアンテナ設定の組合せの優先順位の決定処理を前記相手装置と協調して行う処理部と、
を備え、
前記決定処理は、
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信すること、
(b):前記(a)におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質を取得すること、
(c):前記通信品質が良好なアンテナ設定の組合せの優先順位が相対的に高く、かつ、前記第1の送信アンテナ及び前記第2の受信アンテナのうち一方のアンテナのアンテナ設定が同一であるアンテナ設定の組合せ間では前記通信品質が第2位以降の優先順位が相対的に低くなるように、前記少なくとも一部の組合せに含まれる組合せ間での優先順位を決定すること、
(d):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(c)を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様の優先順位を取得すること、
(e):前記(d)及び(d)において得られた優先順位に基づいて、前記第1及び第2の通信機の間の通信に利用するアンテナ設定の組合せを決定すること、
を備える、無線通信装置。
401、801、81、91 送信機
402、502、82、92 受信機
403、503 送信回路
404 アンテナ設定回路
404-1~M、504-1~K AWV(アレイ重みベクトル)制御回路
405-1~M、505-1~K 送信放射素子
406、506 処理・演算回路
407、507 制御回路
408、508 記憶回路
409、509 受信回路
410 アンテナ設定回路
410-1~N、510-1~L AWV(アレイ重みベクトル)制御回路
411-1~N、511-1~L 受信放射素子
413、513 制御回路
414 アンテナ設定回路
414-1~M スイッチ
415-1~M 送信放射素子
416 アンテナ設定回路
416-1~N スイッチ
417-1~N 受信放射素子
83 ビームパターン(イメージ)
84、85 反射体
86 人体
61 壁
62 反射体
Claims (10)
- 第1及び第2の通信機を含む無線通信システムの制御方法であって、
前記第1の通信機は、送信アンテナ設定を変更することによって第1の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第1の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記第2の通信機は、送信アンテナ設定を変更することによって第2の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第2の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記方法は、
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(b):前記(a)におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質の関係を記述したデータ列を取得し、
(c):前記データ列において、前記アンテナ設定の組み合わせを通信品質が良好な順に整列し、
(d):前記整列を行ったデータ列において、一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせに関し、前記データ列の更新を行い、
(e):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(d)を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様のデータ列を取得し、
(f):前記(d)及び(e)において得られたデータ列に記述された前記第1の送信アンテナ設定と前記第2の受信アンテナ設定の組合せ、及び前記第1の受信アンテナ設定と前記第2の送信アンテナ設定の組合せのうち少なくとも一部の組合せを、前記第1及び第2の通信機の間の通信に利用する無線通信システムの制御方法。 - 前記ステップ(d)における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、前記通信品質が2位以降の組み合わせを前記データ列から削除することにより行う、請求項1記載の無線通信システムの制御方法。
- 前記ステップ(d)における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、前記通信品質が2位以降の組み合わせの前記データ列における順位を下げることにより行う、請求項1記載の無線通信システムの制御方法。
- 前記ステップ(a)、及び前記ステップ(e)中の前記ステップ(a)に相当するステップにおいて使用するアンテナ設定を、
(a1):前記第1の送信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナからトレーニング信号を送信し、
(a2):前記第2の受信アンテナに固定ビームパターンを設定した状態で、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a3):前記ステップ(a2)におけるトレーニング信号の受信結果に基づいて、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの受信信号特性の関係を記述したデータ列を取得し、
(a4):前記データ列を用いて、前記第1の送信アンテナの、通信に利用する候補となる少なくとも1つの第1の送信アンテナ設定を決定し、
(a5):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a1)乃至(a4)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せについて行うことにより、前記第2の送信アンテナの、通信に利用する候補となる少なくとも1つの第2の送信アンテナ設定を決定し、
(a6):前記第1の送信アンテナに固定ビームパターンを設定した状態で、前記第1の送信アンテナからトレーニング信号を送信し、
(a7):前記第2の受信アンテナのアンテナ設定を変更しながら、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a8):前記ステップ(a7)におけるトレーニング信号の受信結果に基づいて、前記第2の受信アンテナのアンテナ設定と受信信号特性の関係を記述したデータ列を取得し、
(a9):前記データ列を用いて、前記第2の受信アンテナの、通信に利用する候補となる少なくとも1つの第2の受信アンテナ設定を決定し、
(a10):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a6)乃至(a9)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せ、について行うことにより、前記第1の受信アンテナの、通信に利用する候補となる少なくとも1つの第1の受信アンテナ設定を決定することにより得ることを特徴とする、請求項1乃至3のいずれか1項に記載の無線通信システムの制御方法。 - 第1の送信アンテナから無線信号を送信でき、第1の受信アンテナによって無線信号を受信できるよう構成された第1の通信機と、
第2の送信アンテナから無線信号を送信でき、第2の受信アンテナによって無線信号を受信できるよう構成された第2の通信機と、
前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信するための第1の手段と、
前記第1の手段におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質の関係を記述したデータ列を取得するための第2の手段と、
前記データ列において、前記アンテナ設定の組み合わせを通信品質が良好な順に整列するための第3の手段と、
前記整列を行ったデータ列において、一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせに関し、前記データ列の更新を行うための第4の手段と、
前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ第1乃至第4の手段を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様のデータ列を取得するための第5の手段と、
前記第4及び第5の手段において得られたデータ列に記述された前記第1の送信アンテナ設定と前記第2の受信アンテナ設定の組合せ、及び前記第1の受信アンテナ設定と前記第2の送信アンテナ設定の組合せのうち少なくとも一部の組合せを、前記第1及び第2の通信機の間の通信に利用するための第6の手段とを備える無線通信システム。 - 前記第4の手段における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、受信信号特性が2位以降の組み合わせを前記データ列から削除することにより行うことを特徴とする、請求項5記載の無線通信システム。
- 前記第4の手段における前記データ列の更新を、前記整列を行ったデータ列において一方のアンテナのアンテナ設定が同一のアンテナ設定の組み合わせについて、受信信号特性が2位以降の組み合わせの前記データ列における順位を下げることを特徴とする、請求項5記載の無線通信システム。
- 前記第1の手段、及び前記第5の手段中の前記第1の手段に相当するステップにおいて使用するアンテナ設定を、
(a1):前記第1の送信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナからトレーニング信号を送信し、
(a2):前記第2の受信アンテナに固定ビームパターンを設定した状態で、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a3):前記ステップ(a2)におけるトレーニング信号の受信結果に基づいて、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナの受信信号特性の関係を記述したデータ列を取得し、
(a4):前記データ列を用いて、前記第1の送信アンテナの、通信に利用する候補となる少なくとも1つの第1の送信アンテナ設定を決定し、
(a5):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a1)乃至(a4)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せについて行うことにより、前記第2の送信アンテナの、通信に利用する候補となる少なくとも1つの第2の送信アンテナ設定を決定し、
(a6):前記第1の送信アンテナに固定ビームパターンを設定した状態で、前記第1の送信アンテナからトレーニング信号を送信し、
(a7):前記第2の受信アンテナのアンテナ設定を変更しながら、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(a8):前記ステップ(a7)におけるトレーニング信号の受信結果に基づいて、前記第2の受信アンテナのアンテナ設定と受信信号特性の関係を記述したデータ列を取得し、
(a9):前記データ列を用いて、前記第2の受信アンテナの、通信に利用する候補となる少なくとも1つの第2の受信アンテナ設定を決定し、
(a10):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a6)乃至(a9)を、前記第2の送信アンテナと前記第1の受信アンテナの組合せ、について行うことにより、前記第1の受信アンテナの、通信に利用する候補となる少なくとも1つの第1の受信アンテナ設定を決定することにより得ることを特徴とする、請求項5乃至7のいずれか1項に記載の無線通信システム。 - 第1及び第2の通信機を含む無線通信システムの制御方法であって、
前記第1の通信機は、送信アンテナ設定を変更することによって第1の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第1の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記第2の通信機は、送信アンテナ設定を変更することによって第2の送信アンテナの送信ビーム方向を制御でき、受信アンテナ設定を変更することによって第2の受信アンテナの受信ビーム方向を制御できるよう構成され、
前記方法は、
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信し、
(b):前記(a)におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質を取得し、
(c):前記通信品質が良好なアンテナ設定の組合せの優先順位が相対的に高く、かつ、前記第1の送信アンテナ及び前記第2の受信アンテナのうち一方のアンテナのアンテナ設定が同一であるアンテナ設定の組合せ間では前記通信品質が第2位以降の優先順位が相対的に低くなるように、前記少なくとも一部の組合せに含まれる組合せ間での優先順位を決定し、
(d):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(c)を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様の優先順位を取得し、
(e):前記(c)及び(d)において得られた優先順位に基づいて、前記第1及び第2の通信機の間の通信に利用するアンテナ設定の組合せを決定する無線通信システムの制御方法。 - 相手装置との間で無線通信を行う無線通信装置であって、
送信アンテナ設定を変更することによって第1の送信アンテナの送信ビーム方向を制御する送信アンテナ設定制御部と、
受信アンテナ設定を変更することによって第1の受信アンテナの受信ビーム方向を制御する受信アンテナ設定制御部と、
前記第1の送信アンテナのアンテナ設定と相手装置が備える第2の受信アンテナのアンテナ設定の組合せ、及び前記第1の受信アンテナと前記相手装置が備える第2の送信アンテナのアンテナ設定の組合せの優先順位の決定処理を前記相手装置と協調して行う処理部と、
を備え、
前記決定処理は、
(a):前記第1の送信アンテナのアンテナ設定、及び前記第2の受信アンテナのアンテナ設定を変更しながら、前記第1の送信アンテナのアンテナ設定と前記第2の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せに関し、前記第1の送信アンテナからトレーニング信号を送信するとともに、前記第2の受信アンテナにおいて前記トレーニング信号を受信すること、
(b):前記(a)におけるトレーニング信号の受信結果に基づいて、前記少なくとも一部の組合せに関し、前記第2の受信アンテナの通信品質を取得すること、
(c):前記通信品質が良好なアンテナ設定の組合せの優先順位が相対的に高く、かつ、前記第1の送信アンテナ及び前記第2の受信アンテナのうち一方のアンテナのアンテナ設定が同一であるアンテナ設定の組合せ間では前記通信品質が第2位以降の優先順位が相対的に低くなるように、前記少なくとも一部の組合せに含まれる組合せ間での優先順位を決定すること、
(d):前記第1の送信アンテナと前記第2の受信アンテナを用いて行った前記ステップ(a)乃至(c)を、前記第2の送信アンテナのアンテナ設定と前記第1の受信アンテナのアンテナ設定がとり得る組合せのうち少なくとも一部の組合せについて行うことにより、同様の優先順位を取得すること、及び
(e):前記(c)及び(d)において得られた優先順位に基づいて、前記第1及び第2の通信機の間の通信に利用するアンテナ設定の組合せを決定すること、
を備える、無線通信装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/635,251 US20130002487A1 (en) | 2010-03-18 | 2010-12-28 | Control method of radio communication system, radio communication system, and radio communication apparatus |
JP2012505327A JP5633559B2 (ja) | 2010-03-18 | 2010-12-28 | 無線通信システムの制御方法、無線通信システム、及び無線通信装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-062568 | 2010-03-18 | ||
JP2010062568 | 2010-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011114412A1 true WO2011114412A1 (ja) | 2011-09-22 |
Family
ID=44648545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/007598 WO2011114412A1 (ja) | 2010-03-18 | 2010-12-28 | 無線通信システムの制御方法、無線通信システム、及び無線通信装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130002487A1 (ja) |
JP (1) | JP5633559B2 (ja) |
WO (1) | WO2011114412A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014230082A (ja) * | 2013-05-22 | 2014-12-08 | 株式会社東芝 | アンテナ装置 |
JP2014236394A (ja) * | 2013-06-03 | 2014-12-15 | キヤノン株式会社 | 通信システム、制御装置、制御方法、及びプログラム |
EP2878082A1 (en) * | 2012-07-27 | 2015-06-03 | Nokia Solutions and Networks Oy | Method, apparatus, computer program product, computer readable medium and system for fast feedback and response handling in wireless networks |
US9847573B2 (en) | 2013-02-01 | 2017-12-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for antenna alignment in a non line-of-sight scenario |
GB2561060A (en) * | 2017-01-31 | 2018-10-03 | Smart Antenna Tech Limited | Beam-Steering reconfigurable Antenna Arrays |
WO2018220793A1 (ja) * | 2017-06-01 | 2018-12-06 | 株式会社ソニー・インタラクティブエンタテインメント | 主ビーム方向決定装置、主ビーム方向決定方法及びプログラム |
JP2022549697A (ja) * | 2019-10-24 | 2022-11-28 | ソニーグループ株式会社 | ミリメートル波見通し外分析 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7006810B1 (en) * | 2002-12-19 | 2006-02-28 | At&T Corp. | Method of selecting receive antennas for MIMO systems |
KR101919049B1 (ko) * | 2011-12-30 | 2018-11-16 | 아주대학교산학협력단 | 통신 시스템에서 분산 통신을 수행하기 위한 통신 단말 및 그 통신 방법 |
US9859959B2 (en) * | 2013-02-01 | 2018-01-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for alignment of multi-beam antennas in a non line-of-sight scenario |
KR102345352B1 (ko) * | 2014-08-24 | 2021-12-30 | 엘지전자 주식회사 | 무선 통신 시스템에서 빔포밍을 위한 가중치 결정 방법 및 이를 위한 장치 |
EP3207642A4 (en) * | 2014-11-17 | 2018-04-04 | MediaTek Inc. | Transceiver architecture for multiple antenna systems |
JP6399516B2 (ja) * | 2014-11-27 | 2018-10-03 | インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Machines Corporation | 無線通信システム、制御装置、最適化方法、無線通信装置およびプログラム |
US10403960B2 (en) * | 2016-03-31 | 2019-09-03 | Dell Products L.P. | System and method for antenna optimization |
US9871574B2 (en) * | 2016-04-05 | 2018-01-16 | Getac Technology Corporation | Antenna signal transmission apparatus and antenna signal transmission method |
CN109067440A (zh) * | 2018-07-18 | 2018-12-21 | 中国传媒大学 | 一种基于波束与多径匹配的mimo天线阵列 |
KR102573284B1 (ko) | 2018-09-19 | 2023-09-01 | 삼성전자주식회사 | 신호의 대역폭에 따라 안테나 설정을 변경하는 전자 장치 및 제어 방법 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002152108A (ja) * | 2000-11-09 | 2002-05-24 | Ntt Docomo Inc | 移動通信方法及びその装置 |
WO2008090836A1 (ja) * | 2007-01-23 | 2008-07-31 | Nec Corporation | 無線制御方法 |
JP2009118126A (ja) * | 2007-11-06 | 2009-05-28 | Panasonic Corp | アンテナ制御装置、アンテナ制御方法、無線通信装置、プログラム及び記録媒体 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8660598B2 (en) * | 2009-11-06 | 2014-02-25 | Nec Laboratories America, Inc. | Systems and methods for prioritizing beams to enable efficient determination of suitable communication links |
-
2010
- 2010-12-28 JP JP2012505327A patent/JP5633559B2/ja active Active
- 2010-12-28 US US13/635,251 patent/US20130002487A1/en not_active Abandoned
- 2010-12-28 WO PCT/JP2010/007598 patent/WO2011114412A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002152108A (ja) * | 2000-11-09 | 2002-05-24 | Ntt Docomo Inc | 移動通信方法及びその装置 |
WO2008090836A1 (ja) * | 2007-01-23 | 2008-07-31 | Nec Corporation | 無線制御方法 |
JP2009118126A (ja) * | 2007-11-06 | 2009-05-28 | Panasonic Corp | アンテナ制御装置、アンテナ制御方法、無線通信装置、プログラム及び記録媒体 |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2878082A1 (en) * | 2012-07-27 | 2015-06-03 | Nokia Solutions and Networks Oy | Method, apparatus, computer program product, computer readable medium and system for fast feedback and response handling in wireless networks |
EP2878082A4 (en) * | 2012-07-27 | 2016-02-24 | Nokia Solutions & Networks Oy | METHOD, APPARATUS, COMPUTER PROGRAM PRODUCT, COMPUTER-READABLE MEDIUM, AND SYSTEM FOR QUICK MANAGEMENT OF FEEDBACK AND RESPONSES DATA IN WIRELESS NETWORKS |
US9425923B2 (en) | 2012-07-27 | 2016-08-23 | Nokia Solutions And Networks Oy | Method, apparatus, computer program product, computer readable medium and system for fast feedback and response handling in wireless networks |
US9847573B2 (en) | 2013-02-01 | 2017-12-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for antenna alignment in a non line-of-sight scenario |
JP2014230082A (ja) * | 2013-05-22 | 2014-12-08 | 株式会社東芝 | アンテナ装置 |
JP2014236394A (ja) * | 2013-06-03 | 2014-12-15 | キヤノン株式会社 | 通信システム、制御装置、制御方法、及びプログラム |
GB2561060A (en) * | 2017-01-31 | 2018-10-03 | Smart Antenna Tech Limited | Beam-Steering reconfigurable Antenna Arrays |
GB2561060B (en) * | 2017-01-31 | 2020-12-16 | Novocomms Ltd | Beam-Steering Reconfigurable Antenna Arrays |
US11239572B2 (en) | 2017-01-31 | 2022-02-01 | Smart Antenna Technologies Ltd. | Beam-steering reconfigurable antenna arrays |
WO2018220793A1 (ja) * | 2017-06-01 | 2018-12-06 | 株式会社ソニー・インタラクティブエンタテインメント | 主ビーム方向決定装置、主ビーム方向決定方法及びプログラム |
JPWO2018220793A1 (ja) * | 2017-06-01 | 2019-12-12 | 株式会社ソニー・インタラクティブエンタテインメント | 主ビーム方向決定装置、主ビーム方向決定方法及びプログラム |
CN110710132A (zh) * | 2017-06-01 | 2020-01-17 | 索尼互动娱乐股份有限公司 | 主波束方向确定设备、主波束方向确定方法和程序 |
US11171700B2 (en) | 2017-06-01 | 2021-11-09 | Sony Interactive Entertainment Inc. | Main beam direction determining device, main beam direction determining method, and program |
CN110710132B (zh) * | 2017-06-01 | 2023-09-05 | 索尼互动娱乐股份有限公司 | 主波束方向确定设备、主波束方向确定方法和程序 |
JP2022549697A (ja) * | 2019-10-24 | 2022-11-28 | ソニーグループ株式会社 | ミリメートル波見通し外分析 |
Also Published As
Publication number | Publication date |
---|---|
JP5633559B2 (ja) | 2014-12-03 |
JPWO2011114412A1 (ja) | 2013-06-27 |
US20130002487A1 (en) | 2013-01-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5633559B2 (ja) | 無線通信システムの制御方法、無線通信システム、及び無線通信装置 | |
JP5310847B2 (ja) | 無線通信システムの制御方法、無線通信システム、無線通信装置、及びアレイ重みベクトルの調整方法 | |
JP5708492B2 (ja) | 無線通信システムの制御方法、無線通信システム、及び無線通信装置 | |
JP5645238B2 (ja) | 無線通信システムの制御方法、及び無線通信システム | |
JP5267567B2 (ja) | 無線通信システムの制御方法、無線通信システム、アレイ重みベクトルの調整方法、及び無線通信装置 | |
JP5975162B2 (ja) | 通信制御方法 | |
JP5429167B2 (ja) | 無線通信システムの制御方法、無線通信システム、送信装置、及び受信装置 | |
JP5598588B2 (ja) | 無線通信システムの制御方法 | |
JP7096452B2 (ja) | 無線通信システム及び無線通信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10847830 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012505327 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13635251 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10847830 Country of ref document: EP Kind code of ref document: A1 |