WO2015029604A1 - Communication control apparatus, communication control method, and terminal apparatus - Google Patents
Communication control apparatus, communication control method, and terminal apparatus Download PDFInfo
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- WO2015029604A1 WO2015029604A1 PCT/JP2014/068092 JP2014068092W WO2015029604A1 WO 2015029604 A1 WO2015029604 A1 WO 2015029604A1 JP 2014068092 W JP2014068092 W JP 2014068092W WO 2015029604 A1 WO2015029604 A1 WO 2015029604A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
Definitions
- the present disclosure relates to a communication control device, a communication control method, and a terminal device.
- a beam in a desired direction is formed by multiplying the signal of each antenna element by a weighting factor.
- a terminal device selects a recommended set from a set of weighting factors (that is, a precoding matrix) included in a codebook and notifies the base station.
- the base station calculates a set of weighting factors based on the reference signal transmitted by the terminal device.
- Patent Document 1 discloses a technique that uses a combination of a first type of precoding weight and a second type of precoding weight.
- the base station may have a larger number of antenna elements (for example, about 100 antenna elements). It is expected that such a large number of antenna elements can form a sharp beam. Furthermore, it is possible to form a beam in a desired three-dimensional direction by arranging the antenna elements on a plane.
- the load related to beam forming can be increased as the number of antenna elements included in the base station is increased.
- the number of weighting factors also increases, so the processing for calculating a set of weighting factors increases. That is, the load in terms of processing of the terminal device or the base station increases.
- the size of the codebook increases, requiring more radio resources for notification of the recommended set of weighting factors, resulting in increased overhead. That is, the load in terms of radio resources increases.
- the number of antenna elements increases, the number of reference signals increases, so that more radio resources are required for transmitting the reference signals, resulting in an increase in overhead. That is, the load in terms of radio resources increases.
- an acquisition unit that acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam, and each of the plurality of three-dimensional beams includes:
- a communication control device comprising: a control unit that controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so as to carry beam specific information corresponding to itself.
- the control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Control transmission of the information addressed to the device.
- the communication control method includes: controlling the transmission of the information addressed to the terminal device so that the three-dimensional beam determined according to the feedback carries the information addressed to the terminal device. Is provided.
- the plurality of 3 A terminal device when each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam carries beam identification information for identifying itself, the plurality of 3 A terminal device is provided that includes an acquisition unit that acquires beam identification information for identifying any three-dimensional beam of the dimension beams, and a notification unit that notifies the acquired beam identification information.
- the beam identification information to be notified is information used for determining a three-dimensional beam carrying information addressed to the terminal device.
- the present disclosure it is possible to reduce a load related to beam forming.
- the above effects are not necessarily limited, and any of the effects shown in the present specification or other effects that can be grasped from the present specification are exhibited together with or in place of the above effects. May be.
- substantially the same elements may be distinguished by adding different alphabets after the same reference numerals.
- substantially the same elements are distinguished as necessary, such as the three-dimensional beam 20A and the three-dimensional beam 20B.
- the same reference numerals are given.
- the three-dimensional beam 20A and the three-dimensional beam 20B they are simply referred to as the three-dimensional beam 20.
- 8-layer MIMO can be realized in the case of SU-MIMO (Single-User Multiple-Input and Multiple-Output).
- 8-layer MIMO is a technique for spatially multiplexing eight independent streams.
- two layers of MU-MIMO can be realized for four users.
- the half-width of the beam formed by the antennas is expected to be narrow. That is, it is expected that a sharp beam can be formed. Furthermore, by arranging the antenna elements on a plane, it becomes possible to form a beam in a desired three-dimensional direction. It has been proposed to transmit a signal toward a specific building located higher than the base station with such a three-dimensional beam.
- the number of antennas increases, the number of users in MU-MIMO can be increased.
- the number of antennas of the terminal device is two, the number of spatially independent streams for one terminal device is two, and therefore, the MU ⁇ is larger than the number of streams for one terminal device. It is more reasonable to increase the number of MIMO users. For these reasons, it is expected that beam forming will be advanced in LTE downlink.
- FIG. 1 is an explanatory diagram for explaining the relationship between the position of each antenna element and the three-dimensional direction of the beam.
- antenna elements arranged in a lattice shape are shown. Also shown are two axes x, y orthogonal to the plane on which the antenna element is arranged, and one axis z orthogonal to the plane.
- the direction of the beam to be formed is represented by, for example, an angle phi (Greek letter) and an angle theta (Greek letter).
- the angle phi (Greek letter) is an angle formed between the x-axis component and the xy plane component in the beam direction.
- the angle theta (Greek letter) is an angle formed by the beam direction and the z axis.
- the weighting factor V m, n of the antenna element arranged m-th in the x-axis direction and n-th arranged in the y-axis direction can be expressed as follows.
- f is the frequency and c is the speed of light.
- J is an imaginary unit in a complex number.
- D x is the distance between the antenna elements in the x-axis direction, and dy is the distance between the antenna elements in the y-axis direction.
- the coordinates of the antenna element are expressed as follows.
- the weighting factor of each antenna element can be obtained by the above-described formula based on the direction and the frequency f. Such weighting factors are used as shown in FIG. 2, for example.
- FIG. 2 is an explanatory diagram for explaining an example of a method of using a weighting factor for beam forming.
- the transmission signal 93 corresponding to each antenna element 91 is complex multiplied by the weighting factor 95 of each antenna element 91.
- the transmission signal in which the weight coefficient 95 is complex-multiplied is transmitted from the antenna element 91.
- complex multiplication of the weighting factor 95 is performed on the digital signal.
- the weight coefficient calculation method is not limited to this. Various calculation techniques can be applied.
- Beam forming in LTE is roughly classified into a method using precoding based on a codebook and a method using precoding not based on a codebook.
- a closed loop method and an open loop method as a method using precoding based on a code book.
- the base station transmits a unique reference signal (for example, CRS (Cell-Specific Reference Signal)) from each of up to four antennas, for example.
- CRS Cell-Specific Reference Signal
- the terminal apparatus estimates channel characteristics by measuring CRS according to the number of transmission antennas of the base station, and calculates an optimal set of weighting factors (precoding matrix) so that the signal quality satisfies a predetermined condition. For example, the terminal apparatus calculates the precoding matrix so that the SINR (Signal to Interference and Noise power Ratio) of the received signal is maximized.
- SINR Signal to Interference and Noise power Ratio
- the terminal device selects a precoding matrix closest to the optimal precoding matrix from the precoding matrix candidates in the codebook and notifies the base station To do.
- a specific example of the code book will be described with reference to FIG.
- FIG. 3 is an explanatory diagram for explaining an example of a code book in which a precoding matrix is defined.
- a codebook including four precoding matrix candidates when the number of layers is 1 and four precoding matrix candidates when the number of layers is two is illustrated.
- the codebook is defined in 3GPP TS 36.211 Table 6.3.4.2.2.3-1.
- the number of rows and the number of columns of each matrix in the codebook are based on the number of transmission antennas and the number of layers (number of data streams), respectively.
- the terminal apparatus determines an optimum precoding matrix candidate from four precoding matrix candidates having one layer number, and notifies the determined precoding matrix candidate to the base station as a recommended precoding matrix.
- the recommended precoding matrix is notified by notifying a codebook index corresponding to the recommended precoding matrix.
- the base station transmits data addressed to the terminal device using the notified recommended precoding matrix (closed loop technique).
- the base station notifies the terminal device of the codebook index corresponding to the precoding matrix to be used (open loop method).
- the recommended precoding matrix can be said to be a recommended set of weighting factors.
- the codebook index may also be called PMI (Precoding Matrix Indicator).
- the codebook when the number of antennas is 4 is defined in 3GPP TS36.211 Table 6.3.4.2.2.3-2.
- a codebook for CSI reporting for a CSI (Channel State Information) reference signal when the number of antennas is 8 is specified in Table 7.2.4-1 of TS36.213 of 3GPP.
- Beamforming with up to 8 layers corresponds to a method using precoding not based on codebook.
- the terminal device does not determine and notify the recommended precoding matrix, and the base station can use any precoding matrix.
- the terminal device transmits a reference signal (sounding reference signal) unique to the terminal device on the uplink. Then, the base station estimates a channel matrix according to reception of the sounding reference signal, and calculates an optimal precoding matrix.
- a reference signal sounding reference signal
- the frequency band in which the sounding reference signal is transmitted is different from the frequency band in which the downlink signal is transmitted by beamforming. Therefore, it is difficult to apply the above method to a precoding matrix for forming a sharp beam.
- FIG. 4 is an explanatory diagram for explaining an example of a signal flow for single-layer beamforming.
- a modulated codeword and a UE (User Equipment) specific reference signal (UE) are mapped to resource elements and transmitted by eight antenna elements.
- a beam is formed by multiplication of such weighting factors.
- FIG. 5 is an explanatory diagram for explaining an example of a signal flow for dual layer beamforming.
- a precoding stage for transmission in a dual layer first stage
- a precoding stage for beamforming second stage
- antenna mounting technology may enable a base station to have a larger number of antenna elements (for example, about 100 antenna elements). It is expected that such a large number of antenna elements can form a sharp beam. Furthermore, it is possible to form a beam in a desired three-dimensional direction by arranging the antenna elements on a plane.
- the load related to beam forming may also increase.
- the number of weighting factors also increases, so the processing for calculating a set of weighting factors increases. That is, the load in terms of processing of the terminal device or the base station increases.
- the size of the codebook increases, requiring more radio resources for notification of the recommended set of weighting factors, resulting in increased overhead. That is, the load in terms of radio resources increases.
- the number of antenna elements increases, the number of reference signals increases, so that more radio resources are required for transmitting the reference signals, resulting in an increase in overhead. That is, the load in terms of radio resources increases.
- the embodiment of the present disclosure makes it possible to reduce the load related to beamforming.
- FIG. 6 is an explanatory diagram illustrating an example of a schematic configuration of the communication system 1 according to the embodiment of the present disclosure.
- the communication system 1 includes a base station 100 and a terminal device 200.
- the base station 100 performs wireless communication with the terminal device 200.
- the base station 100 performs wireless communication with the terminal device 200 located in the cell 10.
- the terminal device 200 performs wireless communication with the base station 100 when located in the cell 10.
- the base station 100 includes a directional antenna that can form a beam in a three-dimensional direction (hereinafter referred to as a “three-dimensional beam”), and transmits a signal using the three-dimensional beam.
- the base station 100 determines a set of three-dimensional beam weighting factors for each terminal device 200, and uses the determined set of weighting factors to transmit a signal addressed to the terminal device 200 using the three-dimensional beam. Then, the terminal device 200 receives the signal transmitted by the three-dimensional beam.
- a three-dimensional beam formed by the base station 100 and an example of signal transmission / reception using the three-dimensional beam will be described with reference to FIGS. 7 and 8.
- FIG. 7 is an explanatory diagram for explaining an example of a three-dimensional beam formed by the base station 100.
- a directional antenna 101 is shown.
- the directional antenna 101 can form a three-dimensional beam.
- the directional antenna 101 forms a plurality of three-dimensional beams 20 in different three-dimensional directions.
- the directional antenna 101 is disposed at a high position, and the three-dimensional beam 20 is radiated downward.
- a communication area 30 corresponding to each three-dimensional beam 20 is generated.
- the three-dimensional beam 20A is formed, and a communication area 30A corresponding to the three-dimensional beam 20A is generated.
- the three-dimensional beam 20B is formed, and a communication area 30B corresponding to the three-dimensional beam 20B is generated.
- FIG. 8 is an explanatory diagram for explaining an example of signal transmission / reception using a three-dimensional beam.
- a base station 100, a terminal device 200A, and a terminal device 200B are shown.
- a three-dimensional beam 20A formed by the base station 100 and a corresponding communication area 30A, and a three-dimensional beam 20B formed by the base station 100 and a corresponding communication area 30B are shown.
- the three-dimensional beam 20A carries a signal to the communication area 30A. That is, the terminal device 200A can receive a signal transmitted from the base station 100 using the three-dimensional beam 20A in the communication area 30A.
- the three-dimensional beam 20B carries a signal to the communication area 30B.
- the terminal device 200B can receive a signal transmitted by the base station 100 using the three-dimensional beam 20B in the communication area 30B.
- the signal intensity of the signal transmitted by the three-dimensional beam 20A is large in the communication area 30A, but small enough to be ignored in the communication area 30B.
- the signal intensity of the signal transmitted by the three-dimensional beam 20B is large in the communication area 30B, but small enough to be ignored in the communication area 30A.
- the base station 100 may transmit a signal with no directivity.
- the base station 100 may form a sector beam and transmit a signal using the sector beam.
- each of a plurality of three-dimensional beams formed by a directional antenna carries information indicating a random access channel corresponding to itself. Then, when a random access procedure is performed by the terminal device 200 on any random access channel, a three-dimensional beam is determined based on the random access channel on which the random access procedure is performed. Then, the determined three-dimensional beam carries information addressed to the terminal device 200. This makes it possible to reduce the load related to beam forming.
- FIG. 9 is a block diagram showing an example of the configuration of the base station 100-1 according to the first embodiment.
- the base station 100-1 includes an antenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 150.
- the antenna unit 110 radiates the signal output from the wireless communication unit 120 to space as a radio wave. Further, the antenna unit 110 converts radio waves in space into a signal and outputs the signal to the wireless communication unit 120.
- the antenna unit 110 forms a three-dimensional beam in a three-dimensional direction and transmits a signal using the three-dimensional beam.
- the antenna unit 110 forms a plurality of three-dimensional beams in different three-dimensional directions.
- the three-dimensional direction of the three-dimensional beam formed by the antenna unit 110 is determined according to a set of weighting factors corresponding to the antenna elements.
- the processing unit 150 transmission control unit 153 multiplies the signal for each antenna element by a weighting factor.
- the antenna unit 110 forms a three-dimensional beam in a three-dimensional direction determined according to the weighting factor.
- the antenna unit 110 may transmit a signal with no directivity.
- the antenna unit 110 may form a sector beam and transmit a signal using the sector beam.
- the antenna unit 110 includes, for example, a directional antenna 101 that can form a beam in a three-dimensional direction.
- the antenna unit 110 may further include an omnidirectional antenna or a sector antenna.
- the wireless communication unit 120 performs wireless communication. For example, the radio communication unit 120 transmits a downlink signal to the terminal device 200 located in the cell 10 and receives an uplink signal from the terminal device 200 located in the cell 10.
- Network communication unit 130 The network communication unit 130 communicates with other communication nodes. For example, the network communication unit 130 communicates with other base stations 100 or core network nodes.
- the storage unit 140 stores a program and data for the operation of the base station 100-1.
- the storage unit 140 includes a random access channel (RACH) corresponding to each of a plurality of three-dimensional beams formed by the directional antenna 101 that can form a three-dimensional beam. Is stored (hereinafter referred to as “RACH information”).
- RACH information stored (hereinafter referred to as “RACH information”).
- the processing unit 150 provides various functions of the base station 100-1.
- the processing unit 150 includes an information acquisition unit 151 and a transmission control unit 153.
- the information acquisition unit 151 acquires information (that is, RACH information) indicating a random access channel (RACH) corresponding to each of a plurality of three-dimensional beams formed by the directional antenna 101 that can form a three-dimensional beam.
- information that is, RACH information
- RACH random access channel
- the information acquisition unit 151 includes first RACH information indicating the RACH corresponding to the three-dimensional beam 20A and second RACH information indicating the RACH corresponding to the three-dimensional beam 20B. To get.
- the plurality of three-dimensional beams are, for example, three-dimensional beams formed by sets having different weighting factors.
- the RACH corresponding to each of the plurality of three-dimensional beams is a RACH corresponding to a set of weighting factors for forming each of the plurality of three-dimensional beams.
- the information acquisition unit 151 forms the first RACH information indicating the RACH corresponding to the set of weighting factors for forming the three-dimensional beam 20A, and the three-dimensional beam 20B. 2nd RACH information which shows RACH corresponding to the set of the weighting coefficient for performing is acquired.
- the RACH corresponding to each of the plurality of three-dimensional beams is different from, for example, the RACH corresponding to the other three-dimensional beams of the plurality of three-dimensional beams.
- a three-dimensional beam (a set of weighting factors) corresponding to the RACH can be uniquely identified.
- the RACH corresponding to the three-dimensional beam 20A and the RACH corresponding to the three-dimensional beam 20B are different from each other. More specifically, for example, the RACH corresponding to the set of weighting factors for forming the three-dimensional beam 20A and the RACH corresponding to the set of weighting factors for forming the three-dimensional beam 20B are different from each other.
- the RACH information is information transmitted as part of system information (System Information), for example. Accordingly, for example, it is possible to notify the RACH information to the terminal device 200-1 that is not in the connected state (for example, the terminal device 200-1 that is in the idle state). Further, for example, it is possible to notify RACH information to an unspecified terminal device 200-1 instead of notifying the individual terminal device 200-1.
- the part of the system information includes a PRACH configuration index and a PRACH frequency offset. This makes it possible to transmit RACH information without adding new information.
- the RACH is, for example, a physical random access channel (PRACH).
- PRACH physical random access channel
- FIG. 10 is an explanatory diagram for explaining a specific example of PRACH.
- a radio frame (RF) 41 is shown in the time direction.
- the radio frame 41 includes 10 subframes.
- the radio frame 41 has a length of 10 ms, and each subframe has a length of 1 ms.
- a radio resource 47 having a width 43 for one subframe in the time direction and a width 45 for six resource blocks (RB) in the frequency direction is used as the PRACH.
- different three-dimensional beams correspond to different PRACHs. That is, different three-dimensional beams (different sets of weighting factors) correspond to different radio resources used as PRACH.
- the plurality of three-dimensional beams may be frequently used three-dimensional beams. That is, the plurality of three-dimensional beams may be three-dimensional beams formed by a frequently used set of weighting factors.
- the transmission control unit 153 controls transmission by the base station 100-1.
- the transmission control unit 153 causes the directional antenna 101 to form a beam by multiplying a signal for each antenna element by a weighting factor.
- the transmission control unit 153 corresponds to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries information (RACH information) indicating the RACH corresponding to itself.
- the transmission of the RACH information indicating the RACH to be performed is controlled.
- the transmission control by the transmission control unit 153 causes the three-dimensional beam 20A to carry first RACH information indicating the RACH corresponding to the three-dimensional beam 20A. Further, the transmission control by the transmission control unit 153 causes the three-dimensional beam 20B to carry second RACH information indicating the RACH corresponding to the three-dimensional beam 20B. That is, the first RACH information is multiplied by a set of weighting factors for forming the three-dimensional beam 20A, and the second RACH information is multiplied by a set of weighting factors for forming the three-dimensional beam 20B. Is done.
- the terminal device 200-1 can acquire RACH information indicating the RACH corresponding to the three-dimensional beam 20 from the three-dimensional beam 20 reaching the terminal device 200-1.
- the terminal device 200A obtains first RACH information indicating the RACH corresponding to the three-dimensional beam 20A reaching the terminal device 200A, and the terminal device 200B receives the three-dimensional beam reaching the terminal device 200B. 2nd RACH information which shows RACH corresponding to 20B is acquired.
- the RACH information is information transmitted as part of system information, for example.
- the transmission control unit 153 is configured so that each of the plurality of three-dimensional beams carries information (RACH information) indicating the RACH corresponding to itself as the part of the system information. The transmission of the RACH information indicating the RACH corresponding to each of the plurality of three-dimensional beams is controlled.
- the part of the system information is a PRACH configuration index and a PRACH frequency offset.
- the three-dimensional beam 20A carries a PRACH configuration index indicating a RACH corresponding to the three-dimensional beam 20A and a PRACH frequency offset.
- the three-dimensional beam 20B carries the PRACH configuration index and the PRACH frequency offset indicating the RACH corresponding to the three-dimensional beam 20B.
- different 3D beams carry different PRACH configuration indexes and PRACH frequency offsets in the same radio resource. That is, different PRACH configuration indexes and PRACH frequency offsets are transmitted on the same radio resource by multiplying different sets of weighting factors.
- the terminal device 200-1 can acquire RACH information indicating the RACH corresponding to the three-dimensional beam 20 reaching the terminal device 200-1 from the system information.
- the terminal apparatus 200A acquires first RACH information indicating the RACH corresponding to the three-dimensional beam 20A from the system information.
- the terminal device 200B acquires second RACH information indicating the RACH corresponding to the three-dimensional beam 20B from the system information.
- the transmission control unit 153 includes information (hereinafter referred to as “hereinafter,“ radio resources ”) assigned to each of the plurality of three-dimensional beams for transmission of information including the part of the system information.
- the transmission of the scheduling information is controlled so as to carry “scheduling information”.
- the scheduling information is downlink control information (DCI) related to system information.
- DCI downlink control information
- scheduling information (DCI) indicating radio resources allocated for transmission of system information is coded using SI-RNTI (System Information Radio Network Temporary Identifier), and is a physical downlink control channel. (Physical Downlink Control Channel: PDCCH)
- the terminal device 200-1 acquires scheduling information by decoding the scheduling information (DCI) using the SI-RNTI, and acquires system information transmitted by the radio resource indicated by the scheduling information. To do.
- the base station 100-1 transmits the RACH information of the system information using a three-dimensional beam.
- the base station 100-1 also uses a three-dimensional beam for scheduling information (DCI) indicating radio resources allocated for transmission of system information including the RACH information. Send.
- DCI three-dimensional beam for scheduling information
- FIG. 11 is an explanatory diagram for explaining an example of information transmitted by a three-dimensional beam.
- the base station 100-1 transmits system information including RACH information using a three-dimensional beam in the radio resource 55 included in the physical downlink shared channel (PDSCH) 53 of the subframe 43B.
- the base station 100-1 also transmits scheduling information indicating the radio resource 55 using a three-dimensional beam in the radio resource 59 included in the PDCCH 57 of the subframe 43B.
- the terminal device 200-1 can acquire the RACH information more reliably.
- the terminal device 200-1 is located at the cell edge and can receive RACH information transmitted by a three-dimensional beam, but when scheduling information of the RACH information is not received, As a result, RACH information cannot be acquired.
- the terminal device 200-1 can acquire the scheduling information more reliably, and as a result, can acquire the RACH information more reliably.
- the scheduling information may be coded using a separately prepared RNTI instead of coding using the SI-RNTI.
- the RNTI may be notified by the base station 100-1, or may be notified individually by the base station 100-1 to the terminal device 200-1 through signaling.
- the transmission control unit 153 is determined based on the RACH on which the random access procedure is performed.
- the transmission of the information addressed to the terminal device 200-1 is controlled so that the dimension beam carries information addressed to the terminal device 200-1.
- the three-dimensional beam determined based on the RACH subjected to the random access procedure is the three-dimensional beam corresponding to the RACH subjected to the random access procedure, or the three-dimensional beam corresponding to the RACH.
- This is a three-dimensional beam determined based on the above.
- RACH information indicating the RACH corresponding to the set of weighting factors is transmitted by a three-dimensional beam formed by the set of weighting factors. Then, the terminal device 200-1 receives RACH information transmitted by the three-dimensional beam. Terminal apparatus 200-1 then transmits a random access preamble on the RACH indicated by the RACH information. Thereafter, the base station 100-1 (transmission control unit 153) recognizes the RACH to which the random access preamble has been transmitted, and transmits a set of weighting factors corresponding to the RACH to the terminal device 200-1. As a set of weighting factors.
- the weighting factor of the three-dimensional beam reaching the terminal device 200-1 is determined from the RACH to which the random access preamble is transmitted, and is determined as a set of weighting factors for transmitting information addressed to the terminal device 200-1. Is done. Base station 100-1 then transmits information addressed to terminal apparatus 200-1 by a three-dimensional beam formed using the determined set of weighting factors.
- the load related to beam forming makes it possible, for example, to reduce the load related to beam forming.
- the base station 100-1 and the terminal device 200-1 do not need to calculate a set of weighting factors, even if the number of antenna elements included in the base station 100-1 increases, the terminal device 200-1 and the terminal device 200-1 The load from the viewpoint of processing of the base station 100-1 does not increase.
- notification of a codebook index is not necessary, overhead is reduced and a load in terms of radio resources is reduced.
- the number of reference signals does not need to be increased, thereby reducing overhead and increasing the load from the viewpoint of radio resources. Decrease. For example, in this way, the load related to beamforming can be reduced from the viewpoint of processing or radio resources.
- FIG. 12 is a sequence diagram illustrating an example of a schematic flow of the entire communication control process according to the first embodiment.
- the base station 100-1 transmits system information including RACH information (S401). At this time, each of the plurality of three-dimensional beams formed by the directional antenna 101 carries RACH information indicating the RACH corresponding to itself.
- the terminal device 200-1 acquires RACH information included in the system information (S403). Then, the terminal device 200-1 performs a random access procedure on the RACH indicated by the RACH information (S405). That is, the terminal device 200-1 transmits a random access preamble on the RACH indicated by the RACH information.
- the base station 100-1 determines a set of three-dimensional beam weighting factors for transmitting information addressed to the terminal device 200-1 based on the RACH on which the random procedure has been performed (S407). Then, the base station 100-1 communicates with the terminal device 200-1 using the determined set of weighting factors (S409). For example, the base station 100-1 transmits information addressed to the terminal device 200-1 by a three-dimensional beam formed by the determined set of weighting factors.
- FIG. 13 is a sequence diagram illustrating an example of a schematic flow of a random access procedure according to the first embodiment.
- the terminal device 200-1 transmits a random access preamble using the RACH indicated by the RACH information (S421). Then, the base station 100-1 transmits a random access response (Random Access Response) to the terminal device 200-1.
- a random access response Random Access Response
- the terminal device 200-1 transmits an RRC connection request by RRC (Radio Resource Control) signaling (S425). Then, the base station 100-1 transmits an RRC connection setup including cell setting information for establishing a connection by RRC signaling (S427).
- RRC Radio Resource Control
- FIG. 14 is a flowchart illustrating an example of a schematic flow of communication control processing on the base station side according to the first embodiment.
- the transmission control unit 153 transmits system information including RACH information via the wireless communication unit 120 (S441). At this time, the transmission control unit 153 controls the transmission of the RACH information so that each of the plurality of three-dimensional beams formed by the directional antenna 101 carries RACH information indicating the RACH corresponding to the transmission beam.
- the transmission control unit 153 weights the three-dimensional beam for transmitting information addressed to the terminal apparatus 200-1 based on the RACH for which the random procedure has been performed. A set of coefficients is determined (S445). Then, the transmission control unit 153 registers the terminal device 200-1 in a group corresponding to the determined set of weighting factors (S447). The same set of weighting factors is used for each group.
- the registration of the terminal device 200-1 with the group may be canceled when a predetermined condition is satisfied.
- the predetermined condition may be that a predetermined time elapses, the terminal device 200-1 may be registered in another group, or may be another condition. .
- each of a plurality of three-dimensional beams formed by a directional antenna carries beam identification information for identifying itself.
- a three-dimensional beam is determined based on the notified beam identification information.
- the determined three-dimensional beam carries information addressed to the terminal device 200. This makes it possible to reduce the load related to beam forming.
- FIG. 15 is a block diagram showing an example of the configuration of the base station 100-2 according to the second embodiment.
- the base station 100-2 includes an antenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 160, and a processing unit 170.
- the antenna unit 110, the wireless communication unit 120, and the network communication unit 130 are not different between the first embodiment and the second embodiment. Therefore, here, the storage unit 160 and the processing unit 170 will be described.
- the storage unit 160 stores a program and data for the operation of the base station 100-2.
- the storage unit 160 stores beam identification information for identifying each of a plurality of three-dimensional beams formed by the directional antenna 101 capable of forming a three-dimensional beam.
- the processing unit 170 provides various functions of the base station 100-2.
- the processing unit 170 includes an information acquisition unit 171 and a transmission control unit 173.
- the information acquisition unit 171 acquires beam identification information for identifying each of a plurality of three-dimensional beams formed by a directional antenna that can form a three-dimensional beam.
- the information acquisition unit 171 includes first beam identification information for identifying the three-dimensional beam 20A and second beam identification information for identifying the three-dimensional beam 20B. To get.
- the plurality of three-dimensional beams are, for example, three-dimensional beams formed by sets having different weighting factors.
- the beam identification information for identifying each of the plurality of three-dimensional beams is information for identifying a set of weighting factors for forming each of the plurality of three-dimensional beams.
- the information acquisition unit 151 forms first beam identification information for identifying a set of weighting factors for forming the three-dimensional beam 20A, and the three-dimensional beam 20B. Second beam identification information for identifying a set of weighting factors to be acquired is acquired.
- the beam identification information for identifying each of the plurality of three-dimensional beams is information transmitted as part of system information, for example. Thereby, for example, it becomes possible to notify the beam identification information to the terminal device 200-2 that is not in the connected state (for example, the terminal device 200-2 that is in the idle state). Further, for example, the beam identification information can be notified to an unspecified terminal device 200-2 instead of being notified to the individual terminal device 200-2.
- the part of the system information is information newly added to the system information.
- the plurality of three-dimensional beams may be frequently used three-dimensional beams. That is, the plurality of three-dimensional beams may be three-dimensional beams formed by a frequently used set of weighting factors.
- the transmission control unit 173 controls transmission by the base station 100-2.
- the transmission control unit 173 causes the directional antenna 101 to form a beam by multiplying a signal for each antenna element by a weighting factor.
- the transmission control unit 173 identifies each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams transmits beam identification information for identifying itself.
- the transmission of the beam identification information is controlled.
- transmission control by the transmission control unit 173 causes the three-dimensional beam 20A to carry first beam identification information for identifying the three-dimensional beam 20A. Further, the transmission control by the transmission control unit 173 causes the three-dimensional beam 20B to carry second beam identification information for identifying the three-dimensional beam 20B. That is, the first beam identification information is multiplied by a set of weighting factors for forming the three-dimensional beam 20A, and the second beam identification information is set by a weighting factor for forming the three-dimensional beam 20B. Is multiplied.
- the terminal device 200-2 can acquire the beam identification information for identifying the three-dimensional beam 20 from the three-dimensional beam 20 reaching the terminal device 200-2.
- the terminal device 200A acquires first beam identification information for identifying the three-dimensional beam 20A reaching the terminal device 200A, and the terminal device 200B receives the three-dimensional beam reaching the terminal device 200B.
- Second beam identification information for identifying 20B is acquired.
- the beam identification information is information transmitted as part of system information, for example.
- the transmission control unit 173 transmits the plurality of 3D beams so that each of the plurality of 3D beams carries beam identification information for identifying itself as the part of the system information. The transmission of the beam identification information for identifying each dimension beam is controlled.
- the three-dimensional beam 20 ⁇ / b> A carries first beam identification information for identifying the three-dimensional beam 20 ⁇ / b> A as part of the system information under the control of the transmission control unit 173.
- the three-dimensional beam 20B carries second beam identification information for identifying the three-dimensional beam 20B as the part of the system information.
- different three-dimensional beams carry different beam identification information in the same radio resource. That is, different beam identification information is transmitted on the same radio resource by multiplying different sets of weighting factors.
- the terminal device 200-2 can acquire beam identification information for identifying the three-dimensional beam 20 reaching the terminal device 200-2 from the system information.
- the terminal device 200A acquires first beam identification information for identifying the three-dimensional beam 20A from the system information.
- the terminal device 200B acquires second beam identification information for identifying the three-dimensional beam 20B from the system information.
- the transmission control unit 173 may transmit information indicating radio resources to which each of the plurality of three-dimensional beams is allocated for transmission of information including the part of the system information (hereinafter, " The transmission of the scheduling information is controlled so as to carry “scheduling information”.
- the scheduling information is downlink control information (DCI) related to system information.
- DCI downlink control information
- scheduling information (DCI) indicating radio resources allocated for transmission of system information is coded using SI-RNTI and is transmitted on PDCCH0.
- the terminal device 200-2 acquires scheduling information by decoding the scheduling information (DCI) using the SI-RNTI, and acquires system information transmitted by the radio resource indicated by the scheduling information.
- the base station 100-2 transmits the beam identification information in the system information using a three-dimensional beam.
- the base station 100-2 also transmits scheduling information (DCI) indicating radio resources allocated for transmission of system information including the beam identification information to the three-dimensional beam. Send by.
- the base station 100-2 transmits system information including beam identification information using a three-dimensional beam in the radio resource 55 included in the PDSCH 53 of the subframe 43B. To do.
- the base station 100-2 also transmits scheduling information indicating the radio resource 55 using a three-dimensional beam on the radio resource 59 included in the PDCCH 57 of the subframe 43B.
- the terminal device 200-2 can acquire the beam identification information more reliably. Specifically, for example, when the terminal device 200-2 is located at the cell edge and can receive the beam identification information transmitted by the three-dimensional beam, the scheduling information of the beam identification information cannot be received. As a result, beam identification information cannot be acquired. However, if the scheduling information of the beam identification information is also transmitted by the three-dimensional beam, the terminal device 200-2 can acquire the scheduling information more reliably, and as a result, more reliably acquire the beam identification information. Can do.
- the scheduling information may be coded using a separately prepared RNTI instead of coding using the SI-RNTI.
- the RNTI may be notified by the base station 100-1, or may be notified individually by the base station 100-1 to the terminal device 200-1 through signaling.
- the transmission control unit 173 determines that the three-dimensional beam determined based on the notified beam identification information is The transmission of the information addressed to the terminal device 200-2 is controlled so as to carry the information addressed to the terminal device 200-2.
- the three-dimensional beam determined based on the notified beam identification information is a three-dimensional beam identified from the notified beam identification information, or the three-dimensional identified from the notified beam identification information. This is a three-dimensional beam determined based on the beam.
- beam identification information for identifying a set of weighting factors is transmitted by a three-dimensional beam formed by the set of weighting factors.
- the terminal device 200-2 receives the beam identification information transmitted by the three-dimensional beam.
- the terminal apparatus 200-2 notifies the beam identification information to the base station 100-2.
- base station 100-2 (transmission control unit 173) determines a set of weighting factors identified from the notified beam identification information as a set of weighting factors for transmitting information addressed to terminal device 200-2.
- the weighting factor of the three-dimensional beam reaching the terminal device 200-2 is determined from the notified beam identification information, and is determined as a set of weighting factors for transmitting information addressed to the terminal device 200-2.
- the base station 100-2 transmits information addressed to the terminal device 200-2 by a three-dimensional beam formed using the determined set of weighting factors.
- the load related to beam forming makes it possible, for example, to reduce the load related to beam forming.
- the base station 100-2 and the terminal device 200-2 do not need to calculate a set of weighting factors, even if the number of antenna elements included in the base station 100-2 increases, the terminal device 200-2 and the terminal device 200-2 The load from the viewpoint of processing of the base station 100-2 does not increase.
- the beam identification information with a smaller number of bits is notified instead of the codebook index notification, the overhead is reduced and the load in terms of radio resources is reduced.
- the beam identification information transmitted by the base station 100-2 and the beam identification information notified by the terminal device 200-2 may have the same format or different formats.
- the terminal device 200-2 acquires the first type of beam identification information transmitted by the base station 100-2, and notifies the base station 100-2 of the first type of beam identification information as it is. May be.
- the terminal device 200-2 acquires the first type of beam identification information transmitted by the base station 100-2, and sends the second type of beam identification information to the base station 100-2. You may be notified.
- the same three-dimensional beam (the same set of weighting factors) is identified from the beam identification information of the first format and the beam identification information of the second format.
- FIG. 16 is a block diagram illustrating an example of a configuration of the terminal device 200-2 according to the second embodiment.
- the terminal device 200-2 includes an antenna unit 210, a wireless communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 260.
- the antenna unit 210 radiates the signal output from the wireless communication unit 220 to the space as a radio wave. Further, the antenna unit 210 converts a radio wave in the space into a signal and outputs the signal to the wireless communication unit 220.
- the wireless communication unit 220 performs wireless communication. For example, when the terminal device 200-2 is located in the cell 10, the wireless communication unit 220 receives a downlink signal from the base station 100-2 and transmits an uplink signal to the base station 100-2. .
- the storage unit 230 stores a program and data for the operation of the terminal device 200-2.
- the input unit 240 receives input from the user of the terminal device 200-2. Then, the input unit 240 provides the input result to the processing unit 260.
- Display unit 250 The display unit 250 displays a screen for showing to the user of the terminal device 200-2. For example, the display unit 250 displays the screen according to control by the processing unit 260 (display control unit 265).
- the processing unit 260 provides various functions of the terminal device 200-2.
- the processing unit 260 includes an information acquisition unit 261, a notification unit 263, and a display control unit 265.
- each of a plurality of three-dimensional beams formed by the directional antenna 101 capable of forming a three-dimensional beam carries beam identification information for identifying itself.
- the information acquisition unit 261 acquires beam identification information for identifying any three-dimensional beam among the plurality of three-dimensional beams.
- the beam identification information is information transmitted as part of the system information.
- the information acquisition unit 261 acquires the beam identification information included in the system information.
- the acquired beam identification information is information for identifying a three-dimensional beam that reaches the terminal device 200-2.
- the notification unit 263 notifies the acquired beam identification information. For example, when the beam identification information is acquired, the notification unit 263 notifies the base station 100-2 of the beam identification information via the wireless communication unit 120.
- the notification unit 263 may notify the beam identification information to the base station 100-2 as part of the communication status report, and the beam identification information as a response to the inquiry from the base station 100-2 by signaling. You may notify to 100-2.
- the beam identification information to be notified is information used to determine a three-dimensional beam carrying information addressed to the terminal device 200-2.
- the display control unit 265 controls display of the output screen by the display unit 250. For example, the display control unit 265 generates an output screen displayed by the display unit 250 and causes the display unit 250 to display the output screen.
- FIG. 17 is a sequence diagram illustrating an example of a schematic flow of the entire communication control process according to the second embodiment.
- the base station 100-2 and the terminal device 200-2 are communicating with each other (S501). Then, the base station 100-2 transmits system information including beam identification information (S503). At this time, each of the plurality of three-dimensional beams formed by the directional antenna 101 carries beam identification information for identifying itself.
- the terminal device 200-2 acquires the beam identification information included in the system information (S505). Then, the terminal device 200-2 notifies the acquired beam identification information to the base station 100-2 (S507).
- the base station 100-2 determines a set of three-dimensional beam weighting factors for transmitting information addressed to the terminal device 200-2 based on the notified beam identification information (S509). At this time, the base station 100-2 registers the terminal device 200-2 in a group corresponding to the determined set of weighting factors. Then, the base station 100-2 communicates with the terminal device 200-2 using the determined set of weighting factors (S511). For example, the base station 100-2 transmits information addressed to the terminal device 200-2 by a three-dimensional beam formed by the determined set of weighting factors.
- the base station 100-2 continuously transmits system information including beam identification information (S513, S515). If there is no notification of the beam identification information from the terminal device 200-2, the base station 100-2 stops using the set of three-dimensional beam weighting factors for the terminal device 200-2 (S517). For example, by canceling the registration of the terminal device 200-2 to the group, the use of the set of weighting factors of the three-dimensional beam is stopped for the terminal device 200-2.
- FIG. 18 is a flowchart illustrating an example of a schematic flow of communication control processing on the base station side according to the second embodiment.
- the transmission control unit 173 transmits system information including beam identification information via the wireless communication unit 120 (S541). At this time, the transmission control unit 173 controls transmission of the beam identification information so that each of the plurality of three-dimensional beams formed by the directional antenna 101 carries beam identification information for identifying itself. .
- the transmission control unit 173 transmits information addressed to the terminal device 200-2 based on the notified beam identification information.
- a set of weighting factors of the three-dimensional beam is determined (S545).
- the transmission control unit 173 registers the terminal device 200-2 in the group corresponding to the determined set of weighting factors (S547). The same set of weighting factors is used for each group.
- step S549: No if the system information transmission cycle has not arrived (S549: No), the processing returns to step S543.
- the transmission control unit 173 cancels the registration of the terminal device 200-2 that does not notify the beam identification information to the group. As a result, the use of the set of three-dimensional beam weighting coefficients for the terminal device 200-2 is stopped. Then, the process returns to step S541.
- FIG. 19 is a flowchart illustrating an example of a schematic flow of communication control processing on the terminal device side according to the second embodiment.
- the information acquisition unit 261 acquires system information (S541).
- the notification unit 263 transmits the acquired beam via the wireless communication unit 220.
- the identification information is notified to the base station 100-2 (S545). Then, the process ends.
- the processing ends.
- the information acquisition unit acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam.
- the transmission control unit controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the transmission control unit. Further, when the feedback corresponding to any of the beam specific information is performed by the terminal device, the transmission control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. The transmission of the information addressed to the terminal device is controlled.
- the beam specific information corresponding to each of the plurality of three-dimensional beams is information (RACH information) indicating the RACH corresponding to each of the plurality of three-dimensional beams.
- the beam specific information corresponding to itself is information (RACH information) indicating the RACH corresponding to itself.
- the feedback corresponding to any beam specific information is a random access procedure on any RACH.
- the three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the RACH on which the random access procedure has been performed.
- the beam specific information corresponding to each of the plurality of three-dimensional beams is beam identification information for identifying each of the plurality of three-dimensional beams.
- the beam specific information corresponding to itself is beam identification information for identifying itself.
- the feedback corresponding to any beam specific information is a notification of any beam identification information.
- the three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the notified beam identification information.
- the beam specific information is not limited to RACH information and beam identification information. Various information can be used as beam specific information.
- the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information.
- RACH information is information transmitted as part of system information.
- the beam identification information is information transmitted as part of the system information.
- the transmission control unit may transmit the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information.
- the transmission of the beam specific information corresponding to each of the three-dimensional beams is controlled.
- the transmission control unit 153 carries the information indicating the RACH corresponding to itself (RACH information) as each of the plurality of three-dimensional beams as the part of the system information.
- the transmission of the RACH information indicating the RACH corresponding to each of the plurality of three-dimensional beams is controlled.
- the transmission control unit 173 causes the plurality of three-dimensional beams to carry beam identification information for identifying themselves as the part of the system information.
- the transmission of the beam identification information for identifying each of the three-dimensional beams is controlled.
- the transmission control unit may include information (scheduling) indicating a radio resource to which each of the plurality of three-dimensional beams is allocated for transmission of information including the part of the system information.
- the transmission of the scheduling information is controlled so as to carry information.
- the plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors.
- the base station 100 may be realized as any type of eNB (evolved Node B) such as a macro eNB, a pico eNB, or a home eNB.
- the base station 100 may be realized as another type of base station such as a NodeB or a BTS (Base Transceiver Station).
- Base station 100 may include a main body (also referred to as a base station apparatus) that controls radio communication, and one or more RRHs (Remote Radio Heads) that are arranged at locations different from the main body.
- RRHs Remote Radio Heads
- the terminal device 200 is a smartphone, a tablet PC (Personal Computer), a notebook PC, a portable game terminal, a mobile terminal such as a portable / dongle type mobile router or a digital camera, or an in-vehicle terminal such as a car navigation device. It may be realized as.
- the terminal device 200 may be realized as a terminal (also referred to as an MTC (Machine Type Communication) terminal) that performs M2M (Machine To Machine) communication.
- the terminal device 200 may be a wireless communication module (for example, an integrated circuit module configured by one die) mounted on these terminals.
- FIG. 20 is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied.
- the eNB 800 includes one or more antennas 810 and a base station device 820. Each antenna 810 and the base station apparatus 820 can be connected to each other via an RF cable.
- Each of the antennas 810 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission and reception of radio signals by the base station apparatus 820.
- at least one antenna 810 is a directional antenna capable of forming a three-dimensional beam.
- the eNB 800 includes a plurality of antennas 810 as illustrated in FIG. 20, and the plurality of antennas 810 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example.
- 20 illustrates an example in which the eNB 800 includes a plurality of antennas 810, but the eNB 800 may include a single antenna 810.
- the base station apparatus 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.
- the controller 821 may be a CPU or a DSP, for example, and operates various functions of the upper layer of the base station apparatus 820. For example, the controller 821 generates a data packet from the data in the signal processed by the wireless communication interface 825, and transfers the generated packet via the network interface 823. The controller 821 may generate a bundled packet by bundling data from a plurality of baseband processors, and may transfer the generated bundled packet. In addition, the controller 821 is a logic that executes control such as radio resource control, radio bearer control, mobility management, inflow control, or scheduling. May have a typical function. Moreover, the said control may be performed in cooperation with a surrounding eNB or a core network node.
- the memory 822 includes RAM and ROM, and stores programs executed by the controller 821 and various control data (for example, terminal list, transmission power data, scheduling data, and the like).
- the network interface 823 is a communication interface for connecting the base station device 820 to the core network 824.
- the controller 821 may communicate with the core network node or other eNB via the network interface 823.
- the eNB 800 and the core network node or another eNB may be connected to each other by a logical interface (for example, an S1 interface or an X2 interface).
- the network interface 823 may be a wired communication interface or a wireless communication interface for wireless backhaul.
- the network interface 823 may use a frequency band higher than the frequency band used by the wireless communication interface 825 for wireless communication.
- the wireless communication interface 825 supports any cellular communication scheme such as LTE (Long Term Evolution) or LTE-Advanced, and provides a wireless connection to terminals located in the cell of the eNB 800 via the antenna 810.
- the wireless communication interface 825 may typically include a baseband (BB) processor 826, an RF circuit 827, and the like.
- the BB processor 826 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and each layer (for example, L1, MAC (Medium Access Control), RLC (Radio Link Control), and PDCP).
- Various signal processing of Packet Data Convergence Protocol
- Packet Data Convergence Protocol is executed.
- the BB processor 826 may have some or all of the logical functions described above instead of the controller 821.
- the BB processor 826 may be a module that includes a memory that stores a communication control program, a processor that executes the program, and related circuits. The function of the BB processor 826 may be changed by updating the program. Good.
- the module may be a card or a blade inserted into a slot of the base station apparatus 820, or a chip mounted on the card or the blade.
- the RF circuit 827 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 810.
- the radio communication interface 825 may include a plurality of BB processors 826 as illustrated in FIG. 20, and the plurality of BB processors 826 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example. Further, the wireless communication interface 825 includes a plurality of RF circuits 827 as shown in FIG. 20, and the plurality of RF circuits 827 may correspond to, for example, a plurality of antenna elements, respectively. 20 illustrates an example in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827. However, the wireless communication interface 825 includes a single BB processor 826 or a single RF circuit 827. But you can.
- FIG. 21 is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied.
- the eNB 830 includes one or more antennas 840, a base station apparatus 850, and an RRH 860. Each antenna 840 and RRH 860 may be connected to each other via an RF cable. Base station apparatus 850 and RRH 860 can be connected to each other via a high-speed line such as an optical fiber cable.
- Each of the antennas 840 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of radio signals by the RRH 860.
- the at least one antenna 840 is a directional antenna capable of forming a three-dimensional beam.
- the eNB 830 includes a plurality of antennas 840 as illustrated in FIG. 21, and the plurality of antennas 840 may respectively correspond to a plurality of frequency bands used by the eNB 830, for example.
- 21 illustrates an example in which the eNB 830 includes a plurality of antennas 840, but the eNB 830 may include a single antenna 840.
- the base station device 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857.
- the controller 851, the memory 852, and the network interface 853 are the same as the controller 821, the memory 822, and the network interface 823 described with reference to FIG.
- the wireless communication interface 855 supports a cellular communication method such as LTE or LTE-Advanced, and provides a wireless connection to a terminal located in a sector corresponding to the RRH 860 via the RRH 860 and the antenna 840.
- the wireless communication interface 855 may typically include a BB processor 856 and the like.
- the BB processor 856 is the same as the BB processor 826 described with reference to FIG. 20 except that the BB processor 856 is connected to the RF circuit 864 of the RRH 860 via the connection interface 857.
- the wireless communication interface 855 includes a plurality of BB processors 856 as illustrated in FIG.
- the plurality of BB processors 856 may respectively correspond to a plurality of frequency bands used by the eNB 830, for example.
- 21 shows an example in which the wireless communication interface 855 includes a plurality of BB processors 856, the wireless communication interface 855 may include a single BB processor 856.
- connection interface 857 is an interface for connecting the base station device 850 (wireless communication interface 855) to the RRH 860.
- the connection interface 857 may be a communication module for communication on the high-speed line that connects the base station apparatus 850 (wireless communication interface 855) and the RRH 860.
- the RRH 860 includes a connection interface 861 and a wireless communication interface 863.
- connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station device 850.
- the connection interface 861 may be a communication module for communication on the high-speed line.
- the wireless communication interface 863 transmits and receives wireless signals via the antenna 840.
- the wireless communication interface 863 may typically include an RF circuit 864 and the like.
- the RF circuit 864 may include a mixer, a filter, an amplifier, and the like, and transmits and receives wireless signals via the antenna 840.
- the wireless communication interface 863 includes a plurality of RF circuits 864 as shown in FIG. 21, and the plurality of RF circuits 864 may correspond to, for example, a plurality of antenna elements, respectively. 21 shows an example in which the wireless communication interface 863 includes a plurality of RF circuits 864, the wireless communication interface 863 may include a single RF circuit 864.
- the information acquisition units 151 and 171 and the transmission control units 153 and 173 described with reference to FIGS. 9 and 15 are the wireless communication interface 825 and the wireless communication interface 855 and / or Alternatively, the wireless communication interface 863 may be implemented. Further, at least a part of these functions may be implemented in the controller 821 and the controller 851.
- FIG. 22 is a block diagram illustrating an example of a schematic configuration of a smartphone 900 to which the technology according to the present disclosure can be applied.
- the smartphone 900 includes a processor 901, a memory 902, a storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915.
- One or more antennas 916, a bus 917, a battery 918 and an auxiliary controller 919 are provided.
- the processor 901 may be, for example, a CPU or a SoC (System on Chip), and controls the functions of the application layer and other layers of the smartphone 900.
- the memory 902 includes a RAM and a ROM, and stores programs executed by the processor 901 and data.
- the storage 903 can include a storage medium such as a semiconductor memory or a hard disk.
- the external connection interface 904 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device to the smartphone 900.
- the camera 906 includes, for example, an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and generates a captured image.
- the sensor 907 may include a sensor group such as a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor.
- the microphone 908 converts sound input to the smartphone 900 into an audio signal.
- the input device 909 includes, for example, a touch sensor that detects a touch on the screen of the display device 910, a keypad, a keyboard, a button, or a switch, and receives an operation or information input from a user.
- the display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smartphone 900.
- the speaker 911 converts an audio signal output from the smartphone 900 into audio.
- the wireless communication interface 912 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication.
- the wireless communication interface 912 may typically include a BB processor 913, an RF circuit 914, and the like.
- the BB processor 913 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication.
- the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 916.
- the wireless communication interface 912 may be a one-chip module in which the BB processor 913 and the RF circuit 914 are integrated.
- the wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914 as illustrated in FIG. 22 shows an example in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914, the wireless communication interface 912 includes a single BB processor 913 or a single RF circuit 914. But you can.
- the wireless communication interface 912 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN (Local Area Network) method in addition to the cellular communication method.
- a BB processor 913 and an RF circuit 914 for each wireless communication method may be included.
- Each of the antenna switches 915 switches the connection destination of the antenna 916 among a plurality of circuits (for example, circuits for different wireless communication systems) included in the wireless communication interface 912.
- Each of the antennas 916 includes a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 912.
- the smartphone 900 may include a plurality of antennas 916 as illustrated in FIG. 22 illustrates an example in which the smartphone 900 includes a plurality of antennas 916, the smartphone 900 may include a single antenna 916.
- the smartphone 900 may include an antenna 916 for each wireless communication method.
- the antenna switch 915 may be omitted from the configuration of the smartphone 900.
- the bus 917 connects the processor 901, the memory 902, the storage 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 to each other.
- the battery 918 supplies power to each block of the smartphone 900 illustrated in FIG. 22 through a power supply line partially illustrated by a broken line in the drawing.
- the auxiliary controller 919 operates the minimum necessary functions of the smartphone 900 in the sleep mode.
- the information acquisition unit 261 and the notification unit 263 described with reference to FIG. 16 may be implemented in the wireless communication interface 912. In addition, at least a part of these functions may be implemented in the processor 901 or the auxiliary controller 919.
- FIG. 23 is a block diagram illustrating an example of a schematic configuration of a car navigation device 920 to which the technology according to the present disclosure can be applied.
- the car navigation device 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, and wireless communication.
- the interface 933 includes one or more antenna switches 936, one or more antennas 937, and a battery 938.
- the processor 921 may be a CPU or SoC, for example, and controls the navigation function and other functions of the car navigation device 920.
- the memory 922 includes RAM and ROM, and stores programs and data executed by the processor 921.
- the GPS module 924 measures the position (for example, latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites.
- the sensor 925 may include a sensor group such as a gyro sensor, a geomagnetic sensor, and an atmospheric pressure sensor.
- the data interface 926 is connected to the in-vehicle network 941 through a terminal (not shown), for example, and acquires data generated on the vehicle side such as vehicle speed data.
- the content player 927 reproduces content stored in a storage medium (for example, CD or DVD) inserted into the storage medium interface 928.
- the input device 929 includes, for example, a touch sensor, a button, or a switch that detects a touch on the screen of the display device 930, and receives an operation or information input from the user.
- the display device 930 has a screen such as an LCD or an OLED display, and displays a navigation function or an image of content to be reproduced.
- the speaker 931 outputs the navigation function or the audio of the content to be played back.
- the wireless communication interface 933 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication.
- the wireless communication interface 933 may typically include a BB processor 934, an RF circuit 935, and the like.
- the BB processor 934 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication.
- the RF circuit 935 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 937.
- the wireless communication interface 933 may be a one-chip module in which the BB processor 934 and the RF circuit 935 are integrated.
- the wireless communication interface 933 may include a plurality of BB processors 934 and a plurality of RF circuits 935 as shown in FIG.
- FIG. 23 shows an example in which the wireless communication interface 933 includes a plurality of BB processors 934 and a plurality of RF circuits 935.
- the wireless communication interface 933 includes a single BB processor 934 or a single RF circuit 935. But you can.
- the wireless communication interface 933 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN method in addition to the cellular communication method.
- a BB processor 934 and an RF circuit 935 may be included for each communication method.
- Each of the antenna switches 936 switches the connection destination of the antenna 937 among a plurality of circuits included in the wireless communication interface 933 (for example, circuits for different wireless communication systems).
- Each of the antennas 937 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 933.
- the car navigation device 920 may include a plurality of antennas 937 as shown in FIG. FIG. 23 illustrates an example in which the car navigation device 920 includes a plurality of antennas 937. However, the car navigation device 920 may include a single antenna 937.
- the car navigation device 920 may include an antenna 937 for each wireless communication method.
- the antenna switch 936 may be omitted from the configuration of the car navigation device 920.
- the battery 938 supplies power to each block of the car navigation device 920 shown in FIG. 23 through a power supply line partially shown by broken lines in the drawing. Further, the battery 938 stores electric power supplied from the vehicle side.
- the information acquisition unit 261 and the notification unit 263 described with reference to FIG. 16 may be implemented in the wireless communication interface 933. Further, at least a part of these functions may be implemented in the processor 921.
- the technology according to the present disclosure may be realized as an in-vehicle system (or vehicle) 940 including one or more blocks of the car navigation device 920 described above, an in-vehicle network 941, and a vehicle side module 942.
- vehicle-side module 942 generates vehicle-side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the in-vehicle network 941.
- the information acquisition unit acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam.
- the transmission control unit controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the transmission control unit.
- the transmission control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. The transmission of the information addressed to the terminal device is controlled.
- the base station 100 and the terminal device 200 do not need to calculate a set of weighting factors, even if the number of antenna elements included in the base station 100 increases, from the viewpoint of processing of the terminal device 200 and the base station 100 The load does not increase.
- the overhead due to the notification of the codebook index is reduced, and the load in terms of radio resources is reduced.
- the number of reference signals does not need to be increased, thereby reducing overhead and reducing the load in terms of radio resources. . For example, in this way, the load related to beamforming can be reduced from the viewpoint of processing or radio resources.
- the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of the system information.
- the beam identification information can be notified to an unspecified terminal device 200 instead of being notified to the individual terminal device 200.
- the transmission control unit may transmit each of the plurality of three-dimensional beams to each of the plurality of three-dimensional beams such that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information. The transmission of the corresponding beam specific information is controlled.
- the terminal device 200 can acquire the beam specific information corresponding to the three-dimensional beam 20 reaching the terminal device 200-2 from the system information.
- the terminal device 200A acquires the first beam specific information corresponding to the three-dimensional beam 20A from the system information.
- the terminal device 200B acquires the second beam specific information corresponding to the three-dimensional beam 20B from the system information.
- the transmission control unit may carry information (scheduling information) indicating a radio resource allocated to each of the plurality of three-dimensional beams for transmission of information including the part of the system information.
- the transmission of the scheduling information is controlled.
- the terminal device 200 can more reliably acquire the beam specific information.
- the terminal device 200 is located at a cell edge and can receive beam specific information transmitted by a three-dimensional beam, but when scheduling information of the beam specific information cannot be received, As a result, beam specific information cannot be acquired.
- the terminal device 200 can acquire the scheduling information more reliably, and as a result, can acquire the beam specific information more reliably.
- the base station may transmit information to a part of terminal devices using a three-dimensional beam.
- the base station may transmit information using a three-dimensional beam to a terminal device located in the periphery of the cell without transmitting information to the terminal device located in the center of the cell using a three-dimensional beam.
- the base station may transmit information using a three-dimensional beam to a terminal device located at a high position (for example, a building on a higher floor).
- processing steps in the communication control processing of this specification do not necessarily have to be executed in time series in the order described in the flowchart.
- the processing steps in the communication control process may be executed in an order different from the order described in the flowchart, or may be executed in parallel.
- a communication control device base station control device
- a terminal device can be used to exhibit functions equivalent to the configurations of the communication control device and the terminal device.
- Computer programs can also be created.
- a storage medium storing the computer program may also be provided.
- An information processing apparatus for example, a processing circuit or a chip including a memory (for example, ROM and RAM) for storing the computer program and a processor (for example, CPU) for executing the computer program may be provided.
- An acquisition unit that acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam;
- a control unit that controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the plurality of three-dimensional beams;
- the control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Control the transmission of the information addressed to the device; Communication control device.
- the communication control apparatus (2) The communication control apparatus according to (1), wherein the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information.
- the control unit includes the beam corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information.
- the communication control device which controls transmission of unique information.
- the control unit includes the information indicating the radio resource such that each of the plurality of three-dimensional beams carries information indicating a radio resource allocated for transmission of information including the part of the system information.
- the communication control device according to (2) or (3), wherein the transmission control is performed.
- the communication control device according to any one of (1) to (4), wherein the plurality of three-dimensional beams are three-dimensional beams formed by sets having different weighting factors.
- the beam specific information corresponding to each of the plurality of three-dimensional beams is information indicating a random access channel corresponding to each of the plurality of three-dimensional beams,
- the beam specific information corresponding to itself is information indicating a random access channel corresponding to itself,
- the feedback corresponding to any beam specific information is a random access procedure on any random access channel;
- the three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the random access channel on which the random access procedure has been performed.
- the communication control apparatus according to any one of (1) to (5).
- the communication control device wherein a random access channel corresponding to each of the plurality of three-dimensional beams is different from a random access channel corresponding to another three-dimensional beam of the plurality of three-dimensional beams.
- the information indicating a random access channel corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information;
- the communication control apparatus according to (6) or (7), wherein the part of the system information includes a physical random access channel configuration index and a physical random access channel frequency offset.
- the plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors;
- the random access channel corresponding to each of the plurality of three-dimensional beams is a random access channel corresponding to a set of weighting factors for forming each of the plurality of three-dimensional beams.
- the communication control apparatus according to any one of (6) to (8).
- the three-dimensional beam determined based on the random access channel on which the random access procedure has been performed is a three-dimensional beam corresponding to the random access channel on which the random access procedure has been performed, or the corresponding to the random access channel.
- the communication control device according to any one of (6) to (9), wherein the communication control device is a three-dimensional beam determined based on the three-dimensional beam.
- the beam specific information corresponding to each of the plurality of three-dimensional beams is beam identification information for identifying each of the plurality of three-dimensional beams,
- the beam specific information corresponding to itself is beam identification information for identifying itself,
- the feedback corresponding to any beam specific information is a notification of any beam identification information;
- the three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the notified beam identification information.
- the communication control apparatus according to any one of (1) to (5).
- the plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors;
- the beam identification information for identifying each of the plurality of three-dimensional beams is information for identifying a set of weighting factors for forming each of the plurality of three-dimensional beams.
- the communication control device according to (11). (13)
- the three-dimensional beam determined based on the notified beam identification information is the three-dimensional beam identified from the notified beam identification information or the three-dimensional beam identified from the notified beam identification information.
- the communication control device according to (11) or (12), wherein the communication control device is a three-dimensional beam determined on the basis of the three-dimensional beam.
- a terminal device When each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam carries beam identification information for identifying itself, any one of the plurality of three-dimensional beams An acquisition unit for acquiring beam identification information for identifying a three-dimensional beam; A notification unit for notifying the acquired beam identification information; With The beam identification information to be notified is information used to determine a three-dimensional beam carrying information addressed to the terminal device. Terminal device.
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Abstract
[Problem] To allow reduction of the load related to beamforming. [Solution] Provided is a communication control apparatus comprising: an acquisition unit that acquires beam-specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming three-dimensional beams; and a control unit that controls the transmission of the beam-specific information corresponding to each of the plurality of three-dimensional beams such that each of the plurality of three-dimensional beams carries the beam-specific information corresponding to that three-dimensional beam. When a feedback corresponding to any beam-specific information is performed by a terminal apparatus, the control unit controls the transmission of information addressed to the terminal apparatus such that a three-dimensional beam determined in accordance with the feedback carries the information addressed to the terminal apparatus.
Description
本開示は、通信制御装置、通信制御方法及び端末装置に関する。
The present disclosure relates to a communication control device, a communication control method, and a terminal device.
近年、複数のアンテナ素子を有する基地局が当該複数のアンテナ素子を使用して端末装置へのビームを形成するビームフォーミングという技術が広く知られている。例えば、LTE(Long Term Evolution)のリリース10では、基地局が8本のアンテナを搭載することが規格化されている。
In recent years, a technique called beam forming in which a base station having a plurality of antenna elements forms a beam to a terminal device using the plurality of antenna elements is widely known. For example, in Release 10 of LTE (Long Term Evolution), it is standardized that a base station is equipped with eight antennas.
ビームフォーミングでは、各アンテナ素子の信号に重み係数を乗算することにより、所望の方向へのビームが形成される。例えば、LTEにおいて、端末装置が、コードブックに含まれる重み係数のセット(即ち、プリコーディング行列)のうちの推奨セットを選択し、基地局に通知する。あるいは、基地局が、端末装置により送信されるリファレンス信号に基づいて、重み係数のセットを算出する。
In beam forming, a beam in a desired direction is formed by multiplying the signal of each antenna element by a weighting factor. For example, in LTE, a terminal device selects a recommended set from a set of weighting factors (that is, a precoding matrix) included in a codebook and notifies the base station. Alternatively, the base station calculates a set of weighting factors based on the reference signal transmitted by the terminal device.
例えば、特許文献1には、プリコーディング重みの第1のタイプとプリコーディング重みの第2のタイプの組合せを使用する技術が開示されている。
For example, Patent Document 1 discloses a technique that uses a combination of a first type of precoding weight and a second type of precoding weight.
一方、近年のアンテナ実装技術の進歩により、基地局がさらに多数のアンテナ素子(例えば、100個程度のアンテナ素子)を有することも可能になり得る。このような多数のアンテナ素子によって鋭いビームの形成が可能になると予想される。さらに、平面にアンテナ素子を配置することにより、所望の3次元方向へのビームを形成することが可能になる。
On the other hand, recent advances in antenna mounting technology may make it possible for the base station to have a larger number of antenna elements (for example, about 100 antenna elements). It is expected that such a large number of antenna elements can form a sharp beam. Furthermore, it is possible to form a beam in a desired three-dimensional direction by arranging the antenna elements on a plane.
しかし、上記特許文献1に開示されている技術を含む従来の技術によれば、基地局が有するアンテナ素子の数の増加に伴い、ビームフォーミングに関連する負荷も増大し得る。一例として、アンテナ素子の数の増加に伴い、重み係数の数も増加するので、重み係数のセットを算出するための処理が増大する。即ち、端末装置又は基地局の処理の観点での負荷が増大する。別の例として、アンテナ素子の数の増加に伴い、コードブックのサイズが大きくなるので、重み係数の推奨セットの通知のためにより多くの無線リソースが必要になり、その結果オーバーヘッドが増大する。即ち、無線リソースの観点での負荷が増大する。さらに別の例として、アンテナ素子の数の増加に伴い、リファレンス信号の数が多くなるので、リファレンス信号の送信のためにより多くの無線リソースが必要になり、その結果オーバーヘッドが増大する。即ち、無線リソースの観点での負荷が増大する。
However, according to conventional techniques including the technique disclosed in Patent Document 1, the load related to beam forming can be increased as the number of antenna elements included in the base station is increased. As an example, as the number of antenna elements increases, the number of weighting factors also increases, so the processing for calculating a set of weighting factors increases. That is, the load in terms of processing of the terminal device or the base station increases. As another example, as the number of antenna elements increases, the size of the codebook increases, requiring more radio resources for notification of the recommended set of weighting factors, resulting in increased overhead. That is, the load in terms of radio resources increases. As yet another example, as the number of antenna elements increases, the number of reference signals increases, so that more radio resources are required for transmitting the reference signals, resulting in an increase in overhead. That is, the load in terms of radio resources increases.
そこで、ビームフォーミングに関連する負荷を軽減することを可能にする仕組みが提供されることが望ましい。
Therefore, it is desirable to provide a mechanism that makes it possible to reduce the load related to beamforming.
本開示によれば、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する取得部と、上記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する制御部と、を備える通信制御装置が提供される。上記制御部は、いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、上記端末装置宛の情報を搬送するように、上記端末装置宛の上記情報の送信を制御する。
According to the present disclosure, an acquisition unit that acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam, and each of the plurality of three-dimensional beams includes: There is provided a communication control device comprising: a control unit that controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so as to carry beam specific information corresponding to itself. When the feedback corresponding to any of the beam specific information is performed by the terminal device, the control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Control transmission of the information addressed to the device.
また、本開示によれば、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得することと、上記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御することと、いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、上記端末装置宛の情報を搬送するように、上記端末装置宛の上記情報の送信を制御することと、を含む通信制御方法が提供される。
In addition, according to the present disclosure, acquiring beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam, and each of the plurality of three-dimensional beams Controlling transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so as to carry beam specific information corresponding to itself, and feedback corresponding to any of the beam specific information is transmitted to the terminal device The communication control method includes: controlling the transmission of the information addressed to the terminal device so that the three-dimensional beam determined according to the feedback carries the information addressed to the terminal device. Is provided.
また、本開示によれば、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する場合に、上記複数の3次元ビームのうちのいずれかの3次元ビームを識別するためのビーム識別情報を取得する取得部と、取得される上記ビーム識別情報を通知する通知部と、を備える端末装置が提供される。通知される上記ビーム識別情報は、上記端末装置宛の情報を搬送する3次元ビームを決定するために用いられる情報である。
Further, according to the present disclosure, when each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam carries beam identification information for identifying itself, the plurality of 3 A terminal device is provided that includes an acquisition unit that acquires beam identification information for identifying any three-dimensional beam of the dimension beams, and a notification unit that notifies the acquired beam identification information. The beam identification information to be notified is information used for determining a three-dimensional beam carrying information addressed to the terminal device.
以上説明したように本開示によれば、ビームフォーミングに関連する負荷を軽減することが可能となる。なお、上記の効果は必ずしも限定的なものではなく、上記効果とともに、又は上記効果に代えて、本明細書に示されたいずれかの効果、又は本明細書から把握され得る他の効果が奏されてもよい。
As described above, according to the present disclosure, it is possible to reduce a load related to beam forming. The above effects are not necessarily limited, and any of the effects shown in the present specification or other effects that can be grasped from the present specification are exhibited together with or in place of the above effects. May be.
以下に添付の図面を参照しながら、本開示の好適な実施の形態について詳細に説明する。なお、本明細書及び図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複説明を省略する。
Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.
また、本明細書及び図面において、実質的に同一の要素を、同一の符号の後に異なるアルファベットを付して区別する場合もある。例えば、実質的に同一の要素を、必要に応じて3次元ビーム20A及び3次元ビーム20Bのように区別する。ただし、実質的に同一の要素の各々を特に区別する必要がない場合、同一符号のみを付する。例えば、3次元ビーム20A及び3次元ビーム20Bを特に区別する必要が無い場合には、単に3次元ビーム20と称する。
In the present specification and drawings, substantially the same elements may be distinguished by adding different alphabets after the same reference numerals. For example, substantially the same elements are distinguished as necessary, such as the three-dimensional beam 20A and the three-dimensional beam 20B. However, when it is not necessary to particularly distinguish each of substantially the same elements, only the same reference numerals are given. For example, when it is not necessary to distinguish between the three-dimensional beam 20A and the three-dimensional beam 20B, they are simply referred to as the three-dimensional beam 20.
なお、説明は以下の順序で行うものとする。
1.はじめに
2.通信システムの概略的な構成
3.第1の実施形態
3.1.基地局の構成
3.2.処理の流れ
4.第2の実施形態
4.1.基地局の構成
4.2.端末装置の構成
4.3.処理の流れ
5.本開示の実施形態に共通の技術的特徴
6.応用例
6.1.基地局に関する応用例
6.2.端末装置に関する応用例
7.まとめ The description will be made in the following order.
1. 1.Introduction 2. Schematic configuration of communication system First embodiment 3.1. Configuration of base station 3.2. Flow of processing Second Embodiment 4.1. Configuration of base station 4.2. Configuration of terminal device 4.3. Process flow 5. Technical features common to the embodiments of the present disclosure Application example 6.1. Application examples related to base stations 6.2. 6. Application examples related to terminal devices Summary
1.はじめに
2.通信システムの概略的な構成
3.第1の実施形態
3.1.基地局の構成
3.2.処理の流れ
4.第2の実施形態
4.1.基地局の構成
4.2.端末装置の構成
4.3.処理の流れ
5.本開示の実施形態に共通の技術的特徴
6.応用例
6.1.基地局に関する応用例
6.2.端末装置に関する応用例
7.まとめ The description will be made in the following order.
1. 1.
<<1.はじめに>>
まず、図1~図5を参照して、ビームフォーミングに関する動向、ビームフォーミングに関する各種技術、及びビームフォーミングに関する課題を説明する。 << 1. Introduction >>
First, with reference to FIG. 1 to FIG. 5, trends related to beam forming, various techniques related to beam forming, and problems related to beam forming will be described.
まず、図1~図5を参照して、ビームフォーミングに関する動向、ビームフォーミングに関する各種技術、及びビームフォーミングに関する課題を説明する。 << 1. Introduction >>
First, with reference to FIG. 1 to FIG. 5, trends related to beam forming, various techniques related to beam forming, and problems related to beam forming will be described.
(ビームフォーミングに関する動向)
近年の移動体データ通信端末の普及により、爆発的に増加するトラフィックへの対応が急務となっている。そのため、3GPP(Third Generation Partnership Project)では、MU-MIMO(Multi-User Multiple-Input and Multiple-Output)、CoMP(Coordinated Multipoint transmission/reception)等の、通信容量を増加させるための技術が検討されている。 (Trends related to beam forming)
With the spread of mobile data communication terminals in recent years, it has become an urgent task to cope with explosively increasing traffic. Therefore, in 3GPP (Third Generation Partnership Project), techniques for increasing communication capacity such as MU-MIMO (Multi-User Multiple-Input and Multiple-Output) and CoMP (Coordinated Multipoint transmission / reception) have been studied. Yes.
近年の移動体データ通信端末の普及により、爆発的に増加するトラフィックへの対応が急務となっている。そのため、3GPP(Third Generation Partnership Project)では、MU-MIMO(Multi-User Multiple-Input and Multiple-Output)、CoMP(Coordinated Multipoint transmission/reception)等の、通信容量を増加させるための技術が検討されている。 (Trends related to beam forming)
With the spread of mobile data communication terminals in recent years, it has become an urgent task to cope with explosively increasing traffic. Therefore, in 3GPP (Third Generation Partnership Project), techniques for increasing communication capacity such as MU-MIMO (Multi-User Multiple-Input and Multiple-Output) and CoMP (Coordinated Multipoint transmission / reception) have been studied. Yes.
LTEのリリース10では、基地局が8本のアンテナを搭載することが規格化されている。よって、当該アンテナによれば、SU-MIMO(Single-User Multiple-Input and Multiple-Output)の場合に8レイヤのMIMOを実現することができる。8レイヤのMIMOとは、独立な8つのストリームを空間的に多重する技術である。また、4ユーザに2レイヤのMU-MIMOを実現することもできる。
In Release 10 of LTE, it is standardized that a base station is equipped with 8 antennas. Therefore, according to the antenna, 8-layer MIMO can be realized in the case of SU-MIMO (Single-User Multiple-Input and Multiple-Output). 8-layer MIMO is a technique for spatially multiplexing eight independent streams. In addition, two layers of MU-MIMO can be realized for four users.
端末装置ではアンテナの配置のためのスペースが小さいこと、及び端末装置の処理能力には限界があることに起因して、端末装置のアンテナを増やすことは難しい。しかし、近年のアンテナ実装技術の進歩により、基地局に100本程度のアンテナを配置することは不可能ではなくなってきている。
It is difficult to increase the number of antennas in the terminal device due to the small space for antenna arrangement in the terminal device and the limited processing capability of the terminal device. However, with recent advances in antenna mounting technology, it is not impossible to arrange about 100 antennas in a base station.
このように100本程度のアンテナを基地局が備えることにより、アンテナにより形成されるビームの半値幅(-3dBのアンテナゲインを伴う角度)は、狭くなることが予想される。即ち、鋭いビームを形成することが可能になることが予想される。さらに、アンテナ素子を平面に配置することにより、所望の3次元方向のビームを形成することが可能になる。このような3次元方向のビームで、基地局よりも高い位置にある特定のビルに向けて信号を送信することが、提案されている。
As described above, when the base station has about 100 antennas, the half-width of the beam formed by the antennas (an angle with an antenna gain of −3 dB) is expected to be narrow. That is, it is expected that a sharp beam can be formed. Furthermore, by arranging the antenna elements on a plane, it becomes possible to form a beam in a desired three-dimensional direction. It has been proposed to transmit a signal toward a specific building located higher than the base station with such a three-dimensional beam.
また、アンテナ本数が増えるので、MU-MIMOでのユーザ数を増やすことが可能になる。端末装置のアンテナ数が2本である場合には、1つの端末装置についての空間的に独立したストリームの数は2本であるので、1つの端末装置についてのストリーム数を増やすよりも、MU-MIMOのユーザ数を増やす方が合理的である。以上の様な理由でLTEのダウンリンクにおけるビームフォーミングの高度化が期待されている。
Also, since the number of antennas increases, the number of users in MU-MIMO can be increased. When the number of antennas of the terminal device is two, the number of spatially independent streams for one terminal device is two, and therefore, the MU− is larger than the number of streams for one terminal device. It is more reasonable to increase the number of MIMO users. For these reasons, it is expected that beam forming will be advanced in LTE downlink.
アンテナ本数が多くなるほど鋭いビームが形成でき、多くのセクタを形成できることので、基地局当たりのユーザの多重数を多くできる。
As the number of antennas increases, a sharper beam can be formed and more sectors can be formed, so that the number of multiplexed users per base station can be increased.
(3Dビームフォーミングの重み係数の算出手法)
ビームフォーミングのための各アンテナ素子の重み係数は、複素数として表される。この点について図1を参照して具体的に説明する。 (Method for calculating weighting coefficient of 3D beam forming)
The weighting factor of each antenna element for beam forming is expressed as a complex number. This point will be specifically described with reference to FIG.
ビームフォーミングのための各アンテナ素子の重み係数は、複素数として表される。この点について図1を参照して具体的に説明する。 (Method for calculating weighting coefficient of 3D beam forming)
The weighting factor of each antenna element for beam forming is expressed as a complex number. This point will be specifically described with reference to FIG.
図1は、各アンテナ素子の位置とビームの3次元方向との関係を説明するための説明図である。図1を参照すると、格子状に配置されたアンテナ素子が示されている。また、アンテナ素子が配置された平面上の直行する2つの軸x、y、及び、当該平面に直行する1つの軸zも示されている。ここで、形成すべきビームの方向は、例えば、角度phi(ギリシャ文字)及び角度theta(ギリシャ文字)で表される。角度phi(ギリシャ文字)は、ビーム方向のうちのxy平面の成分とx軸とのなす角度である。また、角度theta(ギリシャ文字)は、ビーム方向とz軸とのなす角度である。この場合に、例えば、x軸方向においてm番目に配置され、y軸方向においてn番目に配置されるアンテナ素子の重み係数Vm,nは、以下のように表され得る。
FIG. 1 is an explanatory diagram for explaining the relationship between the position of each antenna element and the three-dimensional direction of the beam. Referring to FIG. 1, antenna elements arranged in a lattice shape are shown. Also shown are two axes x, y orthogonal to the plane on which the antenna element is arranged, and one axis z orthogonal to the plane. Here, the direction of the beam to be formed is represented by, for example, an angle phi (Greek letter) and an angle theta (Greek letter). The angle phi (Greek letter) is an angle formed between the x-axis component and the xy plane component in the beam direction. The angle theta (Greek letter) is an angle formed by the beam direction and the z axis. In this case, for example, the weighting factor V m, n of the antenna element arranged m-th in the x-axis direction and n-th arranged in the y-axis direction can be expressed as follows.
fは周波数であり、cは光速である。また、jは複素数における虚数単位である。また、dxは、x軸方向におけるアンテナ素子の間隔であり、dyは、y軸方向におけるアンテナ素子間の間隔である。なお、アンテナ素子の座標は、以下のように表される。
f is the frequency and c is the speed of light. J is an imaginary unit in a complex number. D x is the distance between the antenna elements in the x-axis direction, and dy is the distance between the antenna elements in the y-axis direction. The coordinates of the antenna element are expressed as follows.
所望の3次元方向が決定されると、当該方向及び周波数fに基づいて、各アンテナ素子の重み係数を上述した式により求めることができる。このような重み係数は例えば図2に示されるように用いられる。
When the desired three-dimensional direction is determined, the weighting factor of each antenna element can be obtained by the above-described formula based on the direction and the frequency f. Such weighting factors are used as shown in FIG. 2, for example.
図2は、ビームフォーミングのための重み係数の利用手法の一例を説明するための説明図である。図2を参照すると、各アンテナ素子91に対応する送信信号93には、各アンテナ素子91の重み係数95が複素乗算される。そして、重み係数95が複素乗算された当該送信信号が、アンテナ素子91から送信される。例えば、重み係数95の複素乗算は、デジタル信号に対して行われる。
FIG. 2 is an explanatory diagram for explaining an example of a method of using a weighting factor for beam forming. Referring to FIG. 2, the transmission signal 93 corresponding to each antenna element 91 is complex multiplied by the weighting factor 95 of each antenna element 91. Then, the transmission signal in which the weight coefficient 95 is complex-multiplied is transmitted from the antenna element 91. For example, complex multiplication of the weighting factor 95 is performed on the digital signal.
重み係数の算出の手法の一例を説明したが、重み係数の算出手法はこれに限られない。様々な算出手法が適用され得る。
Although an example of the weight coefficient calculation method has been described, the weight coefficient calculation method is not limited to this. Various calculation techniques can be applied.
(LTEにおけるビームフォーミング)
LTEにおけるビームフォーミングは、コードブックに基づくプリコーディングを使用する方式と、コードブックに基づかないプリコーディングを使用する方式とに大別される。また、コードブックに基づくプリコーディングを使用する方式には、閉ループによる手法と開ループによる手法とがある。 (Beam forming in LTE)
Beamforming in LTE is roughly classified into a method using precoding based on a codebook and a method using precoding not based on a codebook. In addition, there are a closed loop method and an open loop method as a method using precoding based on a code book.
LTEにおけるビームフォーミングは、コードブックに基づくプリコーディングを使用する方式と、コードブックに基づかないプリコーディングを使用する方式とに大別される。また、コードブックに基づくプリコーディングを使用する方式には、閉ループによる手法と開ループによる手法とがある。 (Beam forming in LTE)
Beamforming in LTE is roughly classified into a method using precoding based on a codebook and a method using precoding not based on a codebook. In addition, there are a closed loop method and an open loop method as a method using precoding based on a code book.
-コードブックに基づくプリコーディングを使用する方式
基地局は例えば4本までのアンテナからそれぞれユニークなリファレンス信号(例えば、CRS(Cell-Specific Reference Signal))を送信する。端末装置は、基地局の送信アンテナ本数に応じたCRSを測定することによりチャネル特性を推定し、信号品質が所定の条件を満たすように最適な重み係数のセット(プリコーディング行列)を算出する。例えば、端末装置は、受信信号のSINR(Signal to Interference and Noise power Ratio)が最大になるようにプリコーディング行列を算出する。 -Method using precoding based on codebook The base station transmits a unique reference signal (for example, CRS (Cell-Specific Reference Signal)) from each of up to four antennas, for example. The terminal apparatus estimates channel characteristics by measuring CRS according to the number of transmission antennas of the base station, and calculates an optimal set of weighting factors (precoding matrix) so that the signal quality satisfies a predetermined condition. For example, the terminal apparatus calculates the precoding matrix so that the SINR (Signal to Interference and Noise power Ratio) of the received signal is maximized.
基地局は例えば4本までのアンテナからそれぞれユニークなリファレンス信号(例えば、CRS(Cell-Specific Reference Signal))を送信する。端末装置は、基地局の送信アンテナ本数に応じたCRSを測定することによりチャネル特性を推定し、信号品質が所定の条件を満たすように最適な重み係数のセット(プリコーディング行列)を算出する。例えば、端末装置は、受信信号のSINR(Signal to Interference and Noise power Ratio)が最大になるようにプリコーディング行列を算出する。 -Method using precoding based on codebook The base station transmits a unique reference signal (for example, CRS (Cell-Specific Reference Signal)) from each of up to four antennas, for example. The terminal apparatus estimates channel characteristics by measuring CRS according to the number of transmission antennas of the base station, and calculates an optimal set of weighting factors (precoding matrix) so that the signal quality satisfies a predetermined condition. For example, the terminal apparatus calculates the precoding matrix so that the SINR (Signal to Interference and Noise power Ratio) of the received signal is maximized.
最適なプリコーディング行列そのものの通知によるオーバーヘッドの増加を回避するため、端末装置は、コードブックの中のプリコーディング行列候補から最適なプリコーディング行列に最も近いプリコーディング行列を選択し、基地局に通知する。以下、図3を参照してコードブックの具体例を説明する。
In order to avoid an increase in overhead due to notification of the optimal precoding matrix itself, the terminal device selects a precoding matrix closest to the optimal precoding matrix from the precoding matrix candidates in the codebook and notifies the base station To do. Hereinafter, a specific example of the code book will be described with reference to FIG.
図3は、プリコーディング行列が規定されたコードブックの一例を説明するための説明図である。図3を参照すると、レイヤ数が1の場合の4つのプリコーディング行列候補と、レイヤ数が2の場合の4つのプリコーディング行列候補とを含むコードブックが示されている。当該コードブックは、3GPPのTS36.211のTable 6.3.4.2.3-1に規定されている。コードブックの中の各行列の行数及び列数は、それぞれ、送信アンテナ数及びレイヤ数(データストリーム数)に基づく。端末装置は、例えば、レイヤ数1の4つのプリコーディング行列候補から最適なプリコーディング行列候補を決定し、決定されたプリコーディング行列候補を推奨プリコーディング行列として基地局に通知する。推奨プリコーディング行列は、推奨プリコーディング行列に対応するコードブックインデックスを通知することにより通知される。例えば、基地局は、通知された推奨プリコーディング行列を使用して、端末装置宛のデータを送信する(閉ループによる手法)。一方、基地局は、推奨プリコーディング行列を使用しない場合に、使用するプリコーディング行列に対応するコードブックインデックスを端末装置に通知する(開ループの手法)。なお、推奨プリコーディング行列は、重み係数の推奨セットとも言える。また、コードブックインデックスは、PMI(Precoding Matrix Indicator)とも呼ばれることがある。
FIG. 3 is an explanatory diagram for explaining an example of a code book in which a precoding matrix is defined. Referring to FIG. 3, a codebook including four precoding matrix candidates when the number of layers is 1 and four precoding matrix candidates when the number of layers is two is illustrated. The codebook is defined in 3GPP TS 36.211 Table 6.3.4.2.2.3-1. The number of rows and the number of columns of each matrix in the codebook are based on the number of transmission antennas and the number of layers (number of data streams), respectively. For example, the terminal apparatus determines an optimum precoding matrix candidate from four precoding matrix candidates having one layer number, and notifies the determined precoding matrix candidate to the base station as a recommended precoding matrix. The recommended precoding matrix is notified by notifying a codebook index corresponding to the recommended precoding matrix. For example, the base station transmits data addressed to the terminal device using the notified recommended precoding matrix (closed loop technique). On the other hand, when the recommended precoding matrix is not used, the base station notifies the terminal device of the codebook index corresponding to the precoding matrix to be used (open loop method). Note that the recommended precoding matrix can be said to be a recommended set of weighting factors. The codebook index may also be called PMI (Precoding Matrix Indicator).
なお、アンテナ数が4の場合のコードブックは、3GPPのTS36.211のTable 6.3.4.2.3-2に規定されている。また、アンテナ数が8の場合における、CSI(Channel State Information)リファレンス信号に対するCSIレポーティングのためのコードブックは、3GPPのTS36.213のTable 7.2.4-1に規定されている。
The codebook when the number of antennas is 4 is defined in 3GPP TS36.211 Table 6.3.4.2.2.3-2. In addition, a codebook for CSI reporting for a CSI (Channel State Information) reference signal when the number of antennas is 8 is specified in Table 7.2.4-1 of TS36.213 of 3GPP.
-コードブックに基づかないプリコーディングを使用する方式
レイヤ数が8までのビームフォーミングは、コードブックに基づかないプリコーディングを使用する方式に対応している。当該方式では、端末装置による推奨プリコーディング行列の決定及び通知は行われず、基地局は任意のプリコーディング行列を使用し得る。 -Method using precoding not based on codebook Beamforming with up to 8 layers corresponds to a method using precoding not based on codebook. In this scheme, the terminal device does not determine and notify the recommended precoding matrix, and the base station can use any precoding matrix.
レイヤ数が8までのビームフォーミングは、コードブックに基づかないプリコーディングを使用する方式に対応している。当該方式では、端末装置による推奨プリコーディング行列の決定及び通知は行われず、基地局は任意のプリコーディング行列を使用し得る。 -Method using precoding not based on codebook Beamforming with up to 8 layers corresponds to a method using precoding not based on codebook. In this scheme, the terminal device does not determine and notify the recommended precoding matrix, and the base station can use any precoding matrix.
例えば、端末装置は、アップリンクで端末装置に固有のリファレンス信号(サウンディングリファレンス信号)を送信する。そして、基地局は、サウンディングリファレンス信号の受信に応じてチャネル行列を推定し、最適なプリコーディング行列を算出する。
For example, the terminal device transmits a reference signal (sounding reference signal) unique to the terminal device on the uplink. Then, the base station estimates a channel matrix according to reception of the sounding reference signal, and calculates an optimal precoding matrix.
なお、複信方式としてFDD方式が採用される場合には、サウンディングリファレンス信号が送信される周波数帯域と、ビームフォーミングによりダウンリンク信号が送信される周波数帯域とは異なる。よって、鋭いビームを形成するためのプリコーディング行列に上記方式を適用することは難しい。
When the FDD scheme is adopted as the duplex scheme, the frequency band in which the sounding reference signal is transmitted is different from the frequency band in which the downlink signal is transmitted by beamforming. Therefore, it is difficult to apply the above method to a precoding matrix for forming a sharp beam.
-ビームフォーミングについての信号フロー
図4及び図5を参照して、ビームフォーミングについての信号フローを説明する。 -Signal Flow for Beam Forming A signal flow for beam forming will be described with reference to Figs.
図4及び図5を参照して、ビームフォーミングについての信号フローを説明する。 -Signal Flow for Beam Forming A signal flow for beam forming will be described with reference to Figs.
図4は、シングルレイヤのビームフォーミングについての信号フローの例を説明するための説明図である。図4を参照すると、変調されたコードワード及びUE(User Equipment)固有リファレンス信号(UE-Specific Reference Signal)がリソースエレメントにマッピングされ、8つのアンテナ素子で送信される。そして、上記コードワード及び上記リファレンス信号は、アンテナ素子ごとに、重み係数Wi(i=1~8)を乗算され、送信される。このような重み係数の乗算によりビームが形成される。
FIG. 4 is an explanatory diagram for explaining an example of a signal flow for single-layer beamforming. Referring to FIG. 4, a modulated codeword and a UE (User Equipment) specific reference signal (UE) are mapped to resource elements and transmitted by eight antenna elements. Then, the code word and the reference signal are multiplied by a weight coefficient W i (i = 1 to 8) and transmitted for each antenna element. A beam is formed by multiplication of such weighting factors.
図5は、デュアルレイヤのビームフォーミングについての信号フローの例を説明するための説明図である。図5を参照すると、デュアルレイヤのビームフォーミングでは、デュアルレイヤでの送信のためのプリコーディングのステージ(第1のステージ)と、ビームフォーミングのためのプリコーディングのステージ(第2のステージ)とが存在する。より具体的には、まず、デュアルレイヤでの送信のために、重み係数Wa、Wb、Wc、Wdの乗算が行われ、その後、ビームフォーミングのために、重み係数Wi(i=1~8)の乗算が行われる。このような重み係数の乗算により、デュアルレイヤでの送信を行いつつ、ビームを形成することができる。
FIG. 5 is an explanatory diagram for explaining an example of a signal flow for dual layer beamforming. Referring to FIG. 5, in dual layer beamforming, a precoding stage for transmission in a dual layer (first stage) and a precoding stage for beamforming (second stage) are provided. Exists. More specifically, weighting factors W a , W b , W c , and W d are first multiplied for transmission in the dual layer, and then the weighting factors W i (i = 1 to 8) multiplication is performed. By such multiplication of weighting factors, it is possible to form a beam while performing transmission in a dual layer.
(ビームフォーミングに関する課題)
上述したように、近年のアンテナ実装技術の進歩により、基地局がさらに多数のアンテナ素子(例えば、100個程度のアンテナ素子)を有することも可能になり得る。このような多数のアンテナ素子によって鋭いビームの形成が可能になると予想される。さらに、平面にアンテナ素子を配置することにより、所望の3次元方向へのビームを形成することが可能になる。 (Issues related to beam forming)
As described above, recent advances in antenna mounting technology may enable a base station to have a larger number of antenna elements (for example, about 100 antenna elements). It is expected that such a large number of antenna elements can form a sharp beam. Furthermore, it is possible to form a beam in a desired three-dimensional direction by arranging the antenna elements on a plane.
上述したように、近年のアンテナ実装技術の進歩により、基地局がさらに多数のアンテナ素子(例えば、100個程度のアンテナ素子)を有することも可能になり得る。このような多数のアンテナ素子によって鋭いビームの形成が可能になると予想される。さらに、平面にアンテナ素子を配置することにより、所望の3次元方向へのビームを形成することが可能になる。 (Issues related to beam forming)
As described above, recent advances in antenna mounting technology may enable a base station to have a larger number of antenna elements (for example, about 100 antenna elements). It is expected that such a large number of antenna elements can form a sharp beam. Furthermore, it is possible to form a beam in a desired three-dimensional direction by arranging the antenna elements on a plane.
しかし、基地局が有するアンテナ素子の数の増加に伴い、ビームフォーミングに関連する負荷も増大し得る。一例として、アンテナ素子の数の増加に伴い、重み係数の数も増加するので、重み係数のセットを算出するための処理が増大する。即ち、端末装置又は基地局の処理の観点での負荷が増大する。別の例として、アンテナ素子の数の増加に伴い、コードブックのサイズが大きくなるので、重み係数の推奨セットの通知のためにより多くの無線リソースが必要になり、その結果オーバーヘッドが増大する。即ち、無線リソースの観点での負荷が増大する。さらに別の例として、アンテナ素子の数の増加に伴い、リファレンス信号の数が多くなるので、リファレンス信号の送信のためにより多くの無線リソースが必要になり、その結果オーバーヘッドが増大する。即ち、無線リソースの観点での負荷が増大する。
However, as the number of antenna elements included in the base station increases, the load related to beam forming may also increase. As an example, as the number of antenna elements increases, the number of weighting factors also increases, so the processing for calculating a set of weighting factors increases. That is, the load in terms of processing of the terminal device or the base station increases. As another example, as the number of antenna elements increases, the size of the codebook increases, requiring more radio resources for notification of the recommended set of weighting factors, resulting in increased overhead. That is, the load in terms of radio resources increases. As yet another example, as the number of antenna elements increases, the number of reference signals increases, so that more radio resources are required for transmitting the reference signals, resulting in an increase in overhead. That is, the load in terms of radio resources increases.
そこで、本開示の実施形態は、ビームフォーミングに関連する負荷を軽減することを可能にする。
Therefore, the embodiment of the present disclosure makes it possible to reduce the load related to beamforming.
<<2.通信システムの概略的な構成>>
続いて、図6~図8を参照して、本開示の実施形態に係る通信システム1の概略的な構成を説明する。図6は、本開示の実施形態に係る通信システム1の概略的な構成の一例を示す説明図である。図6を参照すると、通信システム1は、基地局100及び端末装置200を含む。 << 2. Schematic configuration of communication system >>
Subsequently, a schematic configuration of thecommunication system 1 according to the embodiment of the present disclosure will be described with reference to FIGS. FIG. 6 is an explanatory diagram illustrating an example of a schematic configuration of the communication system 1 according to the embodiment of the present disclosure. Referring to FIG. 6, the communication system 1 includes a base station 100 and a terminal device 200.
続いて、図6~図8を参照して、本開示の実施形態に係る通信システム1の概略的な構成を説明する。図6は、本開示の実施形態に係る通信システム1の概略的な構成の一例を示す説明図である。図6を参照すると、通信システム1は、基地局100及び端末装置200を含む。 << 2. Schematic configuration of communication system >>
Subsequently, a schematic configuration of the
基地局100は、端末装置200との無線通信を行う。例えば、基地局100は、セル10内に位置する端末装置200との無線通信を行う。換言すると、端末装置200は、セル10内に位置する場合に基地局100との無線通信を行う。
The base station 100 performs wireless communication with the terminal device 200. For example, the base station 100 performs wireless communication with the terminal device 200 located in the cell 10. In other words, the terminal device 200 performs wireless communication with the base station 100 when located in the cell 10.
とりわけ本開示の実施形態では、基地局100は、3次元方向へのビーム(以下、「3次元ビーム」と呼ぶ)を形成可能な指向性アンテナを備え、3次元ビームによって信号を送信する。例えば、基地局100は、端末装置200ごとに3次元ビームの重み係数のセットを決定し、決定された重み係数のセットを使用して、3次元ビームによって端末装置200宛の信号を送信する。そして、端末装置200は、3次元ビームによって送信された上記信号を受信する。以下、図7及び図8を参照して、基地局100により形成される3次元ビームの例、及び、3次元ビームによる信号の送受信の例を説明する。
In particular, in the embodiment of the present disclosure, the base station 100 includes a directional antenna that can form a beam in a three-dimensional direction (hereinafter referred to as a “three-dimensional beam”), and transmits a signal using the three-dimensional beam. For example, the base station 100 determines a set of three-dimensional beam weighting factors for each terminal device 200, and uses the determined set of weighting factors to transmit a signal addressed to the terminal device 200 using the three-dimensional beam. Then, the terminal device 200 receives the signal transmitted by the three-dimensional beam. Hereinafter, an example of a three-dimensional beam formed by the base station 100 and an example of signal transmission / reception using the three-dimensional beam will be described with reference to FIGS. 7 and 8.
図7は、基地局100により形成される3次元ビームの例を説明するための説明図である。図7を参照すると、指向性アンテナ101が示されている。指向性アンテナ101は、3次元ビームを形成可能である。図7に示されるように、指向性アンテナ101は、異なる3次元方向への複数の3次元ビーム20を形成する。例えばこのように、指向性アンテナ101は高い位置に配置され、3次元ビーム20は、下方向に向かって放射される。すると、各3次元ビーム20に対応する通信領域30が発生する。具体的には、3次元ビーム20Aが形成され、3次元ビーム20Aに対応する通信領域30Aが発生する。また、3次元ビーム20Bが形成され、3次元ビーム20Bに対応する通信領域30Bが発生する。
FIG. 7 is an explanatory diagram for explaining an example of a three-dimensional beam formed by the base station 100. Referring to FIG. 7, a directional antenna 101 is shown. The directional antenna 101 can form a three-dimensional beam. As shown in FIG. 7, the directional antenna 101 forms a plurality of three-dimensional beams 20 in different three-dimensional directions. For example, in this way, the directional antenna 101 is disposed at a high position, and the three-dimensional beam 20 is radiated downward. Then, a communication area 30 corresponding to each three-dimensional beam 20 is generated. Specifically, the three-dimensional beam 20A is formed, and a communication area 30A corresponding to the three-dimensional beam 20A is generated. Further, the three-dimensional beam 20B is formed, and a communication area 30B corresponding to the three-dimensional beam 20B is generated.
図8は、3次元ビームによる信号の送受信の例を説明するための説明図である。図8を参照すると、基地局100並びに端末装置200A及び端末装置200Bが示されている。さらに、基地局100により形成される3次元ビーム20A及びそれに対応する通信領域30Aと、基地局100により形成される3次元ビーム20B及びそれに対応する通信領域30Bとが、示されている。3次元ビーム20Aは、通信領域30Aに信号を搬送する。即ち、端末装置200Aは、通信領域30Aにおいて、基地局100が3次元ビーム20Aによって送信する信号を受信することができる。また、3次元ビーム20Bは、通信領域30Bに信号を搬送する。即ち、端末装置200Bは、通信領域30Bにおいて、基地局100が3次元ビーム20Bによって送信する信号を受信することができる。なお、3次元ビーム20Aによって送信される信号の信号強度は、通信領域30Aでは大きいが、通信領域30Bにおいては無視できる程度の小さい。また、3次元ビーム20Bによって送信される信号の信号強度は、通信領域30Bでは大きいが、通信領域30Aにおいては無視できる程度の小さい。
FIG. 8 is an explanatory diagram for explaining an example of signal transmission / reception using a three-dimensional beam. Referring to FIG. 8, a base station 100, a terminal device 200A, and a terminal device 200B are shown. Furthermore, a three-dimensional beam 20A formed by the base station 100 and a corresponding communication area 30A, and a three-dimensional beam 20B formed by the base station 100 and a corresponding communication area 30B are shown. The three-dimensional beam 20A carries a signal to the communication area 30A. That is, the terminal device 200A can receive a signal transmitted from the base station 100 using the three-dimensional beam 20A in the communication area 30A. The three-dimensional beam 20B carries a signal to the communication area 30B. That is, the terminal device 200B can receive a signal transmitted by the base station 100 using the three-dimensional beam 20B in the communication area 30B. The signal intensity of the signal transmitted by the three-dimensional beam 20A is large in the communication area 30A, but small enough to be ignored in the communication area 30B. The signal intensity of the signal transmitted by the three-dimensional beam 20B is large in the communication area 30B, but small enough to be ignored in the communication area 30A.
なお、さらに、基地局100は、無指向性で信号を送信してもよい。あるいは、基地局100は、セクタビームを形成し、セクタビームによって信号を送信してもよい。
In addition, the base station 100 may transmit a signal with no directivity. Alternatively, the base station 100 may form a sector beam and transmit a signal using the sector beam.
<<3.第1の実施形態>>
続いて、図9~図14を参照して、本開示の第1の実施形態を説明する。本開示の第1の実施形態によれば、指向性アンテナにより形成される複数の3次元ビームの各々が、自らに対応するランダムアクセスチャネルを示す情報を搬送する。そして、いずれかのランダムアクセスチャネルで端末装置200によりランダムアクセス手続きが行われると、当該ランダムアクセス手続きが行われたランダムアクセスチャネルに基づいて、3次元ビームが決定される。すると、決定された3次元ビームが、端末装置200宛の情報を搬送する。これにより、ビームフォーミングに関連する負荷を軽減することを可能になる。 << 3. First Embodiment >>
Subsequently, the first embodiment of the present disclosure will be described with reference to FIGS. 9 to 14. According to the first embodiment of the present disclosure, each of a plurality of three-dimensional beams formed by a directional antenna carries information indicating a random access channel corresponding to itself. Then, when a random access procedure is performed by theterminal device 200 on any random access channel, a three-dimensional beam is determined based on the random access channel on which the random access procedure is performed. Then, the determined three-dimensional beam carries information addressed to the terminal device 200. This makes it possible to reduce the load related to beam forming.
続いて、図9~図14を参照して、本開示の第1の実施形態を説明する。本開示の第1の実施形態によれば、指向性アンテナにより形成される複数の3次元ビームの各々が、自らに対応するランダムアクセスチャネルを示す情報を搬送する。そして、いずれかのランダムアクセスチャネルで端末装置200によりランダムアクセス手続きが行われると、当該ランダムアクセス手続きが行われたランダムアクセスチャネルに基づいて、3次元ビームが決定される。すると、決定された3次元ビームが、端末装置200宛の情報を搬送する。これにより、ビームフォーミングに関連する負荷を軽減することを可能になる。 << 3. First Embodiment >>
Subsequently, the first embodiment of the present disclosure will be described with reference to FIGS. 9 to 14. According to the first embodiment of the present disclosure, each of a plurality of three-dimensional beams formed by a directional antenna carries information indicating a random access channel corresponding to itself. Then, when a random access procedure is performed by the
<3.1.基地局の構成>
まず、図9~図11を参照して、第1の実施形態に係る基地局100-1の構成の一例を説明する。図9は、第1の実施形態に係る基地局100-1の構成の一例を示すブロック図である。図9を参照すると、基地局100-1は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部150を備える。 <3.1. Base station configuration>
First, an example of the configuration of the base station 100-1 according to the first embodiment will be described with reference to FIG. 9 to FIG. FIG. 9 is a block diagram showing an example of the configuration of the base station 100-1 according to the first embodiment. Referring to FIG. 9, the base station 100-1 includes anantenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 150.
まず、図9~図11を参照して、第1の実施形態に係る基地局100-1の構成の一例を説明する。図9は、第1の実施形態に係る基地局100-1の構成の一例を示すブロック図である。図9を参照すると、基地局100-1は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部150を備える。 <3.1. Base station configuration>
First, an example of the configuration of the base station 100-1 according to the first embodiment will be described with reference to FIG. 9 to FIG. FIG. 9 is a block diagram showing an example of the configuration of the base station 100-1 according to the first embodiment. Referring to FIG. 9, the base station 100-1 includes an
(アンテナ部110)
アンテナ部110は、無線通信部120により出力される信号を電波として空間に放射する。また、アンテナ部110は、空間の電波を信号に変換し、当該信号を無線通信部120へ出力する。 (Antenna unit 110)
Theantenna unit 110 radiates the signal output from the wireless communication unit 120 to space as a radio wave. Further, the antenna unit 110 converts radio waves in space into a signal and outputs the signal to the wireless communication unit 120.
アンテナ部110は、無線通信部120により出力される信号を電波として空間に放射する。また、アンテナ部110は、空間の電波を信号に変換し、当該信号を無線通信部120へ出力する。 (Antenna unit 110)
The
とりわけ本開示の実施形態では、アンテナ部110は、3次元方向への3次元ビームを形成し、3次元ビームによって信号を送信する。例えば、アンテナ部110は、異なる3次元方向への複数の3次元ビームを形成する。
In particular, in the embodiment of the present disclosure, the antenna unit 110 forms a three-dimensional beam in a three-dimensional direction and transmits a signal using the three-dimensional beam. For example, the antenna unit 110 forms a plurality of three-dimensional beams in different three-dimensional directions.
アンテナ部110により形成される3次元ビームの3次元方向は、アンテナ素子に対応する重み係数のセットに応じて決まる。例えば、アンテナ素子ごとの信号に対する重み係数の乗算が処理部150(送信制御部153)により行われる。その結果、アンテナ部110は、当該重み係数に応じて決まる3次元方向への3次元ビームを形成する。
The three-dimensional direction of the three-dimensional beam formed by the antenna unit 110 is determined according to a set of weighting factors corresponding to the antenna elements. For example, the processing unit 150 (transmission control unit 153) multiplies the signal for each antenna element by a weighting factor. As a result, the antenna unit 110 forms a three-dimensional beam in a three-dimensional direction determined according to the weighting factor.
なお、さらに、アンテナ部110は、無指向性で信号を送信してもよい。また、アンテナ部110は、セクタビームを形成し、セクタビームによって信号を送信してもよい。
In addition, the antenna unit 110 may transmit a signal with no directivity. The antenna unit 110 may form a sector beam and transmit a signal using the sector beam.
アンテナ部110は、例えば、3次元方向へのビームを形成可能な指向性アンテナ101を含む。アンテナ部110は、無指向性のアンテナ又はセクタアンテナをさらに含んでもよい。
The antenna unit 110 includes, for example, a directional antenna 101 that can form a beam in a three-dimensional direction. The antenna unit 110 may further include an omnidirectional antenna or a sector antenna.
(無線通信部120)
無線通信部120は、無線通信を行う。例えば、無線通信部120は、セル10内に位置する端末装置200へのダウンリンク信号を送信し、セル10内に位置する端末装置200からのアップリンク信号を受信する。 (Wireless communication unit 120)
Thewireless communication unit 120 performs wireless communication. For example, the radio communication unit 120 transmits a downlink signal to the terminal device 200 located in the cell 10 and receives an uplink signal from the terminal device 200 located in the cell 10.
無線通信部120は、無線通信を行う。例えば、無線通信部120は、セル10内に位置する端末装置200へのダウンリンク信号を送信し、セル10内に位置する端末装置200からのアップリンク信号を受信する。 (Wireless communication unit 120)
The
(ネットワーク通信部130)
ネットワーク通信部130は、他の通信ノードと通信する。例えば、ネットワーク通信部130は、他の基地局100又はコアネットワークノードと通信する。 (Network communication unit 130)
Thenetwork communication unit 130 communicates with other communication nodes. For example, the network communication unit 130 communicates with other base stations 100 or core network nodes.
ネットワーク通信部130は、他の通信ノードと通信する。例えば、ネットワーク通信部130は、他の基地局100又はコアネットワークノードと通信する。 (Network communication unit 130)
The
(記憶部140)
記憶部140は、基地局100-1の動作のためのプログラム及びデータを記憶する。 (Storage unit 140)
Thestorage unit 140 stores a program and data for the operation of the base station 100-1.
記憶部140は、基地局100-1の動作のためのプログラム及びデータを記憶する。 (Storage unit 140)
The
とりわけ第1の実施形態では、例えば、記憶部140は、3次元ビームを形成可能な指向性アンテナ101により形成される複数の3次元ビームの各々に対応するランダムアクセスチャネル(Random Access Channel:RACH)を示す情報(以下、「RACH情報」と呼ぶ)を記憶する。
In particular, in the first embodiment, for example, the storage unit 140 includes a random access channel (RACH) corresponding to each of a plurality of three-dimensional beams formed by the directional antenna 101 that can form a three-dimensional beam. Is stored (hereinafter referred to as “RACH information”).
(処理部150)
処理部150は、基地局100-1の様々な機能を提供する。処理部150は、情報取得部151及び送信制御部153を含む。 (Processing unit 150)
Theprocessing unit 150 provides various functions of the base station 100-1. The processing unit 150 includes an information acquisition unit 151 and a transmission control unit 153.
処理部150は、基地局100-1の様々な機能を提供する。処理部150は、情報取得部151及び送信制御部153を含む。 (Processing unit 150)
The
(情報取得部151)
情報取得部151は、3次元ビームを形成可能な指向性アンテナ101により形成される複数の3次元ビームの各々に対応するランダムアクセスチャネル(RACH)を示す情報(即ち、RACH情報)を取得する。 (Information acquisition unit 151)
Theinformation acquisition unit 151 acquires information (that is, RACH information) indicating a random access channel (RACH) corresponding to each of a plurality of three-dimensional beams formed by the directional antenna 101 that can form a three-dimensional beam.
情報取得部151は、3次元ビームを形成可能な指向性アンテナ101により形成される複数の3次元ビームの各々に対応するランダムアクセスチャネル(RACH)を示す情報(即ち、RACH情報)を取得する。 (Information acquisition unit 151)
The
具体例として、図8を再び参照すると、情報取得部151は、3次元ビーム20Aに対応するRACHを示す第1のRACH情報、及び、3次元ビーム20Bに対応するRACHを示す第2のRACH情報を取得する。
As a specific example, referring to FIG. 8 again, the information acquisition unit 151 includes first RACH information indicating the RACH corresponding to the three-dimensional beam 20A and second RACH information indicating the RACH corresponding to the three-dimensional beam 20B. To get.
上記複数の3次元ビームは、例えば、重み係数の異なるセットにより形成される3次元ビームである。そして、上記複数の3次元ビームの各々に対応するRACHは、上記複数の3次元ビームの各々を形成するための重み係数のセットに対応するRACHである。
The plurality of three-dimensional beams are, for example, three-dimensional beams formed by sets having different weighting factors. The RACH corresponding to each of the plurality of three-dimensional beams is a RACH corresponding to a set of weighting factors for forming each of the plurality of three-dimensional beams.
具体例として、図8を再び参照すると、情報取得部151は、3次元ビーム20Aを形成するための重み係数のセットに対応するRACHを示す第1のRACH情報、及び、3次元ビーム20Bを形成するための重み係数のセットに対応するRACHを示す第2のRACH情報を取得する。
As a specific example, referring to FIG. 8 again, the information acquisition unit 151 forms the first RACH information indicating the RACH corresponding to the set of weighting factors for forming the three-dimensional beam 20A, and the three-dimensional beam 20B. 2nd RACH information which shows RACH corresponding to the set of the weighting coefficient for performing is acquired.
上記複数の3次元ビームの各々に対応するRACHは、例えば、上記複数の3次元ビームの他の3次元ビームに対応するRACHと異なる。これにより、例えば、RACHに対応する3次元ビーム(重み係数のセット)が一意に特定され得る。
The RACH corresponding to each of the plurality of three-dimensional beams is different from, for example, the RACH corresponding to the other three-dimensional beams of the plurality of three-dimensional beams. Thereby, for example, a three-dimensional beam (a set of weighting factors) corresponding to the RACH can be uniquely identified.
具体例として、図8を再び参照すると、3次元ビーム20Aに対応するRACHと、3次元ビーム20Bに対応するRACHとは、互いに異なる。さらに具体的には、例えば、3次元ビーム20Aを形成するための重み係数のセットに対応するRACHと、3次元ビーム20Bを形成するための重み係数のセットに対応するRACHとは、互いに異なる。
As a specific example, referring again to FIG. 8, the RACH corresponding to the three-dimensional beam 20A and the RACH corresponding to the three-dimensional beam 20B are different from each other. More specifically, for example, the RACH corresponding to the set of weighting factors for forming the three-dimensional beam 20A and the RACH corresponding to the set of weighting factors for forming the three-dimensional beam 20B are different from each other.
上記RACH情報は、例えば、システム情報(System Information)の一部として送信される情報である。これにより、例えば、接続状態ではない端末装置200-1(例えば、アイドル状態である端末装置200-1)にもRACH情報を知らせることが可能になる。また、例えば、RACH情報を、個別の端末装置200-1へ通知するのではなく、不特定の端末装置200-1へ報知することが可能になる。具体的には、例えば、上記システム情報の上記一部は、PRACHコンフィギュレーションインデックス及びPRACH周波数オフセットを含む。これにより、新たな情報を追加することなく、RACH情報を送信することが可能になる。
The RACH information is information transmitted as part of system information (System Information), for example. Accordingly, for example, it is possible to notify the RACH information to the terminal device 200-1 that is not in the connected state (for example, the terminal device 200-1 that is in the idle state). Further, for example, it is possible to notify RACH information to an unspecified terminal device 200-1 instead of notifying the individual terminal device 200-1. Specifically, for example, the part of the system information includes a PRACH configuration index and a PRACH frequency offset. This makes it possible to transmit RACH information without adding new information.
なお、上記RACHは、例えば、物理ランダムアクセスチャネル(Physical Random Access Channel:PRACH)である。以下、図10を参照してPRACHの具体例を説明する。
The RACH is, for example, a physical random access channel (PRACH). Hereinafter, a specific example of PRACH will be described with reference to FIG.
図10は、PRACHの具体例を説明するための説明図である。図10を参照すると、時間方向において、無線フレーム(Radio Frame:RF)41が示されている。無線フレーム41は、10個のサブフレームを含む。無線フレーム41の長さは10msであり、各サブフレームの長さは1msである。例えば、時間方向において1サブフレーム分の幅43を有し、周波数方向において6リソースブロック(RB)分の幅45を有する無線リソース47が、PRACHとして使用される。そして、例えば、異なる3次元ビーム(重み係数の異なるセット)は、異なるPRACHに対応する。即ち、異なる3次元ビーム(重み係数の異なるセット)は、PRACHとして使用される異なる無線リソースに対応する。
FIG. 10 is an explanatory diagram for explaining a specific example of PRACH. Referring to FIG. 10, a radio frame (RF) 41 is shown in the time direction. The radio frame 41 includes 10 subframes. The radio frame 41 has a length of 10 ms, and each subframe has a length of 1 ms. For example, a radio resource 47 having a width 43 for one subframe in the time direction and a width 45 for six resource blocks (RB) in the frequency direction is used as the PRACH. For example, different three-dimensional beams (different sets of weighting factors) correspond to different PRACHs. That is, different three-dimensional beams (different sets of weighting factors) correspond to different radio resources used as PRACH.
なお、上記複数の3次元ビームは、頻繁に使用される3次元ビームであってもよい。即ち、上記複数の3次元ビームは、頻繁に使用される重み係数のセットにより形成される3次元ビームであってもよい。
The plurality of three-dimensional beams may be frequently used three-dimensional beams. That is, the plurality of three-dimensional beams may be three-dimensional beams formed by a frequently used set of weighting factors.
(送信制御部153)
送信制御部153は、基地局100-1による送信を制御する。例えば、送信制御部153は、アンテナ素子ごとの信号に重み係数を乗算することにより、指向性アンテナ101にビームを形成させる。 (Transmission control unit 153)
Thetransmission control unit 153 controls transmission by the base station 100-1. For example, the transmission control unit 153 causes the directional antenna 101 to form a beam by multiplying a signal for each antenna element by a weighting factor.
送信制御部153は、基地局100-1による送信を制御する。例えば、送信制御部153は、アンテナ素子ごとの信号に重み係数を乗算することにより、指向性アンテナ101にビームを形成させる。 (Transmission control unit 153)
The
-RACH情報の送信制御
送信制御部153は、上記複数の3次元ビームの各々が、自らに対応するRACHを示す情報(RACH情報)を搬送するように、上記複数の3次元ビームの各々に対応するRACHを示す上記RACH情報の送信を制御する。 -Transmission control of RACH information Thetransmission control unit 153 corresponds to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries information (RACH information) indicating the RACH corresponding to itself. The transmission of the RACH information indicating the RACH to be performed is controlled.
送信制御部153は、上記複数の3次元ビームの各々が、自らに対応するRACHを示す情報(RACH情報)を搬送するように、上記複数の3次元ビームの各々に対応するRACHを示す上記RACH情報の送信を制御する。 -Transmission control of RACH information The
具体例として、図8を再び参照すると、送信制御部153による送信制御により、3次元ビーム20Aが、3次元ビーム20Aに対応するRACHを示す第1のRACH情報を搬送する。また、送信制御部153による送信制御により、3次元ビーム20Bが、3次元ビーム20Bに対応するRACHを示す第2のRACH情報を搬送する。即ち、第1のRACH情報には、3次元ビーム20Aを形成するための重み係数のセットが乗算され、第2のRACH情報には、3次元ビーム20Bを形成するための重み係数のセットが乗算される。
As a specific example, referring to FIG. 8 again, the transmission control by the transmission control unit 153 causes the three-dimensional beam 20A to carry first RACH information indicating the RACH corresponding to the three-dimensional beam 20A. Further, the transmission control by the transmission control unit 153 causes the three-dimensional beam 20B to carry second RACH information indicating the RACH corresponding to the three-dimensional beam 20B. That is, the first RACH information is multiplied by a set of weighting factors for forming the three-dimensional beam 20A, and the second RACH information is multiplied by a set of weighting factors for forming the three-dimensional beam 20B. Is done.
これにより、端末装置200-1は、端末装置200-1に届く3次元ビーム20から、当該3次元ビーム20に対応するRACHを示すRACH情報を取得することが可能になる。例えば、図8を参照すると、端末装置200Aは、端末装置200Aに届く3次元ビーム20Aに対応するRACHを示す第1のRACH情報を取得し、端末装置200Bは、端末装置200Bに届く3次元ビーム20Bに対応するRACHを示す第2のRACH情報を取得する。
As a result, the terminal device 200-1 can acquire RACH information indicating the RACH corresponding to the three-dimensional beam 20 from the three-dimensional beam 20 reaching the terminal device 200-1. For example, referring to FIG. 8, the terminal device 200A obtains first RACH information indicating the RACH corresponding to the three-dimensional beam 20A reaching the terminal device 200A, and the terminal device 200B receives the three-dimensional beam reaching the terminal device 200B. 2nd RACH information which shows RACH corresponding to 20B is acquired.
上述したように、例えば、上記RACH情報は、例えば、システム情報の一部として送信される情報である。この場合に、送信制御部153は、例えば、上記複数の3次元ビームの各々が、上記システム情報の上記一部として、自らに対応するRACHを示す情報(RACH情報)を搬送するように、上記複数の3次元ビームの各々に対応するRACHを示す上記RACH情報の送信を制御する。
As described above, for example, the RACH information is information transmitted as part of system information, for example. In this case, for example, the transmission control unit 153 is configured so that each of the plurality of three-dimensional beams carries information (RACH information) indicating the RACH corresponding to itself as the part of the system information. The transmission of the RACH information indicating the RACH corresponding to each of the plurality of three-dimensional beams is controlled.
具体例として、上述したように、上記システム情報の上記一部は、PRACHコンフィギュレーションインデックス及びPRACH周波数オフセットである。図8を再び参照すると、送信制御部153による送信制御により、3次元ビーム20Aが、3次元ビーム20Aに対応するRACHを示すPRACHコンフィギュレーションインデックス及びPRACH周波数オフセットを搬送する。一方、送信制御部153による送信制御により、3次元ビーム20Bが、3次元ビーム20Bに対応するRACHを示すPRACHコンフィギュレーションインデックス及びPRACH周波数オフセットを搬送する。このように、同一の無線リソースにおいて、異なる3次元ビームが、異なるPRACHコンフィギュレーションインデックス及びPRACH周波数オフセットを搬送する。即ち、異なるPRACHコンフィギュレーションインデックス及びPRACH周波数オフセットが、異なる重み係数のセットの乗算により、同一の無線リソースで送信される。
As a specific example, as described above, the part of the system information is a PRACH configuration index and a PRACH frequency offset. Referring to FIG. 8 again, due to transmission control by the transmission control unit 153, the three-dimensional beam 20A carries a PRACH configuration index indicating a RACH corresponding to the three-dimensional beam 20A and a PRACH frequency offset. On the other hand, by the transmission control by the transmission control unit 153, the three-dimensional beam 20B carries the PRACH configuration index and the PRACH frequency offset indicating the RACH corresponding to the three-dimensional beam 20B. Thus, different 3D beams carry different PRACH configuration indexes and PRACH frequency offsets in the same radio resource. That is, different PRACH configuration indexes and PRACH frequency offsets are transmitted on the same radio resource by multiplying different sets of weighting factors.
これにより、端末装置200-1は、システム情報から、端末装置200-1に届く3次元ビーム20に対応するRACHを示すRACH情報を取得することが可能になる。例えば、図8を参照すると、端末装置200Aは、システム情報から、3次元ビーム20Aに対応するRACHを示す第1のRACH情報を取得する。一方、端末装置200Bは、システム情報から、3次元ビーム20Bに対応するRACHを示す第2のRACH情報を取得する。
As a result, the terminal device 200-1 can acquire RACH information indicating the RACH corresponding to the three-dimensional beam 20 reaching the terminal device 200-1 from the system information. For example, referring to FIG. 8, the terminal apparatus 200A acquires first RACH information indicating the RACH corresponding to the three-dimensional beam 20A from the system information. On the other hand, the terminal device 200B acquires second RACH information indicating the RACH corresponding to the three-dimensional beam 20B from the system information.
-スケジューリング情報の送信制御
例えば、送信制御部153は、上記複数の3次元ビームの各々が、上記システム情報の上記一部を含む情報の送信のために割り当てられる無線リソースを示す情報(以下、「スケジューリング情報」と呼ぶ)を搬送するように、上記スケジューリング情報の送信を制御する。例えば、上記スケジューリング情報は、システム情報に関するダウンリンク制御情報(Downlink Control Information:DCI)である。 -Scheduling Information Transmission Control For example, thetransmission control unit 153 includes information (hereinafter referred to as “hereinafter,“ radio resources ”) assigned to each of the plurality of three-dimensional beams for transmission of information including the part of the system information. The transmission of the scheduling information is controlled so as to carry “scheduling information”. For example, the scheduling information is downlink control information (DCI) related to system information.
例えば、送信制御部153は、上記複数の3次元ビームの各々が、上記システム情報の上記一部を含む情報の送信のために割り当てられる無線リソースを示す情報(以下、「スケジューリング情報」と呼ぶ)を搬送するように、上記スケジューリング情報の送信を制御する。例えば、上記スケジューリング情報は、システム情報に関するダウンリンク制御情報(Downlink Control Information:DCI)である。 -Scheduling Information Transmission Control For example, the
具体的には、例えば、システム情報の送信のために割り当てられる無線リソースを示すスケジューリング情報(DCI)は、SI-RNTI(System Information Radio Network Temporary Identifier)を使用してコーディングされ、物理ダウンリンク制御チャネル(Physical Downlink Control Channel:PDCCH)で送信される。端末装置200-1は、上記SI-RNTIを使用して上記スケジューリング情報(DCI)をデコーディングすることにより、スケジューリング情報を取得し、当該スケジューリング情報により示される無線リソースで送信されるシステム情報を取得する。とりわけ第1の実施形態では、例えば、上述したように、基地局100-1は、システム情報のうちのRACH情報を、3次元ビームによって送信する。そして、さらに、第1の実施形態では、例えば、基地局100-1は、上記RACH情報を含むシステム情報の送信のために割り当てられた無線リソースを示すスケジューリング情報(DCI)も、3次元ビームによって送信する。以下、この点について図11を参照して具体例を説明する。
Specifically, for example, scheduling information (DCI) indicating radio resources allocated for transmission of system information is coded using SI-RNTI (System Information Radio Network Temporary Identifier), and is a physical downlink control channel. (Physical Downlink Control Channel: PDCCH) The terminal device 200-1 acquires scheduling information by decoding the scheduling information (DCI) using the SI-RNTI, and acquires system information transmitted by the radio resource indicated by the scheduling information. To do. In particular, in the first embodiment, for example, as described above, the base station 100-1 transmits the RACH information of the system information using a three-dimensional beam. In addition, in the first embodiment, for example, the base station 100-1 also uses a three-dimensional beam for scheduling information (DCI) indicating radio resources allocated for transmission of system information including the RACH information. Send. Hereinafter, a specific example of this point will be described with reference to FIG.
図11は、3次元ビームによって送信される情報の例を説明するための説明図である。図11を参照すると、時間方向において、3つのサブフレーム43A、43B、43Cが示され、周波数方向において、周波数帯域幅51が示されている。例えば、基地局100-1は、RACH情報を含むシステム情報を、サブフレーム43Bの物理ダウンリンク共有チャネル(Physical Downlink Shared Channel:PDSCH)53に含まれる無線リソース55において、3次元ビームによって送信する。また、基地局100-1は、無線リソース55を示すスケジューリング情報も、サブフレーム43BのPDCCH57に含まれる無線リソース59において、3次元ビームによって送信する。
FIG. 11 is an explanatory diagram for explaining an example of information transmitted by a three-dimensional beam. Referring to FIG. 11, three subframes 43A, 43B, and 43C are shown in the time direction, and a frequency bandwidth 51 is shown in the frequency direction. For example, the base station 100-1 transmits system information including RACH information using a three-dimensional beam in the radio resource 55 included in the physical downlink shared channel (PDSCH) 53 of the subframe 43B. In addition, the base station 100-1 also transmits scheduling information indicating the radio resource 55 using a three-dimensional beam in the radio resource 59 included in the PDCCH 57 of the subframe 43B.
これにより、例えば、端末装置200-1は、RACH情報をより確実に取得することが可能になる。具体的には、例えば、端末装置200-1は、セルエッジに位置し、3次元ビームによって送信されるRACH情報を受信可能であるが、当該RACH情報のスケジューリング情報が受信不能である場合には、結果として、RACH情報を取得することができない。しかし、RACH情報のスケジューリング情報も3次元ビームによって送信されれば、端末装置200-1は、当該スケジューリング情報をより確実に取得することができ、結果としてRACH情報をより確実に取得することができる。
Thereby, for example, the terminal device 200-1 can acquire the RACH information more reliably. Specifically, for example, the terminal device 200-1 is located at the cell edge and can receive RACH information transmitted by a three-dimensional beam, but when scheduling information of the RACH information is not received, As a result, RACH information cannot be acquired. However, if the scheduling information of the RACH information is also transmitted by the three-dimensional beam, the terminal device 200-1 can acquire the scheduling information more reliably, and as a result, can acquire the RACH information more reliably. .
なお、スケジューリング情報は、SI-RNTIを使用してコーディングされる代わりに、別に用意されたRNTIを使用してコーディングされてもよい。当該RNTIは、基地局100-1により報知されてもよく、又は、基地局100-1により端末装置200-1に個別にシグナリングで通知されてもよい。
Note that the scheduling information may be coded using a separately prepared RNTI instead of coding using the SI-RNTI. The RNTI may be notified by the base station 100-1, or may be notified individually by the base station 100-1 to the terminal device 200-1 through signaling.
-端末装置宛の情報の送信制御
送信制御部153は、いずれかのRACHで端末装置200-1によりランダムアクセス手続きが行われると、当該ランダムアクセス手続きが行われた上記RACHに基づき決定される3次元ビームが、端末装置200-1宛の情報を搬送するように、端末装置200-1宛の上記情報の送信を制御する。 -Transmission control of information addressed to terminal device When the random access procedure is performed by the terminal device 200-1 on any RACH, thetransmission control unit 153 is determined based on the RACH on which the random access procedure is performed. The transmission of the information addressed to the terminal device 200-1 is controlled so that the dimension beam carries information addressed to the terminal device 200-1.
送信制御部153は、いずれかのRACHで端末装置200-1によりランダムアクセス手続きが行われると、当該ランダムアクセス手続きが行われた上記RACHに基づき決定される3次元ビームが、端末装置200-1宛の情報を搬送するように、端末装置200-1宛の上記情報の送信を制御する。 -Transmission control of information addressed to terminal device When the random access procedure is performed by the terminal device 200-1 on any RACH, the
例えば、当該ランダムアクセス手続きが行われた上記RACHに基づき決定される3次元ビームは、当該ランダムアクセス手続きが行われた上記RACHに対応する3次元ビーム、又は当該RACHに対応する当該3次元ビームに基づき決定される3次元ビームである。
For example, the three-dimensional beam determined based on the RACH subjected to the random access procedure is the three-dimensional beam corresponding to the RACH subjected to the random access procedure, or the three-dimensional beam corresponding to the RACH. This is a three-dimensional beam determined based on the above.
具体的には、例えば、重み係数のセットに対応するRACHを示すRACH情報が、重み係数の当該セットにより形成される3次元ビームによって送信される。すると、端末装置200-1は、当該3次元ビームによって送信されるRACH情報を受信する。そして、端末装置200-1は、当該RACH情報により示されるRACHで、ランダムアクセスプリアンブルを送信する。その後、基地局100-1(送信制御部153)は、ランダムアクセスプリアンブルが送信されたRACHを認識し、当該RACHに対応する重み係数のセットを、端末装置200-1宛の情報を送信するための重み係数のセットとして決定する。このように、端末装置200-1に届く3次元ビームの重み係数が、ランダムアクセスプリアンブルが送信されたRACHから判明し、端末装置200-1宛の情報を送信するための重み係数のセットとして決定される。そして、基地局100-1は、決定された重み係数のセットを使用して形成される3次元ビームによって、端末装置200-1宛の情報を送信する。
Specifically, for example, RACH information indicating the RACH corresponding to the set of weighting factors is transmitted by a three-dimensional beam formed by the set of weighting factors. Then, the terminal device 200-1 receives RACH information transmitted by the three-dimensional beam. Terminal apparatus 200-1 then transmits a random access preamble on the RACH indicated by the RACH information. Thereafter, the base station 100-1 (transmission control unit 153) recognizes the RACH to which the random access preamble has been transmitted, and transmits a set of weighting factors corresponding to the RACH to the terminal device 200-1. As a set of weighting factors. As described above, the weighting factor of the three-dimensional beam reaching the terminal device 200-1 is determined from the RACH to which the random access preamble is transmitted, and is determined as a set of weighting factors for transmitting information addressed to the terminal device 200-1. Is done. Base station 100-1 then transmits information addressed to terminal apparatus 200-1 by a three-dimensional beam formed using the determined set of weighting factors.
これにより、例えば、ビームフォーミングに関連する負荷を軽減することが可能になる。一例として、基地局100-1及び端末装置200-1は重み係数のセットを算出する必要はないので、基地局100-1が有するアンテナ素子の数が増加したとしても、端末装置200-1及び基地局100-1の処理の観点での負荷は増加しない。また、別の例として、コードブックインデックスの通知が不要であるので、オーバーヘッドが減少し、無線リソースの観点での負荷が減少する。また、さらに別の例として、基地局100-1が有するアンテナ素子の数が増加したとしても、リファレンス信号の数を増やさなくてもよいので、オーバーヘッドが減少し、無線リソースの観点での負荷が減少する。例えばこのように、処理又は無線リソースなどの観点から、ビームフォーミングに関連する負荷が軽減され得る。
This makes it possible, for example, to reduce the load related to beam forming. As an example, since the base station 100-1 and the terminal device 200-1 do not need to calculate a set of weighting factors, even if the number of antenna elements included in the base station 100-1 increases, the terminal device 200-1 and the terminal device 200-1 The load from the viewpoint of processing of the base station 100-1 does not increase. As another example, since notification of a codebook index is not necessary, overhead is reduced and a load in terms of radio resources is reduced. As yet another example, even if the number of antenna elements included in the base station 100-1 increases, the number of reference signals does not need to be increased, thereby reducing overhead and increasing the load from the viewpoint of radio resources. Decrease. For example, in this way, the load related to beamforming can be reduced from the viewpoint of processing or radio resources.
<3.2.処理の流れ>
次に、図12~図14を参照して、第1の実施形態に係る通信制御処理の例を説明する。 <3.2. Flow of processing>
Next, an example of communication control processing according to the first embodiment will be described with reference to FIGS.
次に、図12~図14を参照して、第1の実施形態に係る通信制御処理の例を説明する。 <3.2. Flow of processing>
Next, an example of communication control processing according to the first embodiment will be described with reference to FIGS.
(全体の処理の流れ)
図12は、第1の実施形態に係る通信制御処理全体の概略的な流れの一例を示すシーケンス図である。 (Overall process flow)
FIG. 12 is a sequence diagram illustrating an example of a schematic flow of the entire communication control process according to the first embodiment.
図12は、第1の実施形態に係る通信制御処理全体の概略的な流れの一例を示すシーケンス図である。 (Overall process flow)
FIG. 12 is a sequence diagram illustrating an example of a schematic flow of the entire communication control process according to the first embodiment.
基地局100-1は、RACH情報を含むシステム情報を送信する(S401)。この際に、指向性アンテナ101により形成される複数の3次元ビームの各々が、自らに対応するRACHを示すRACH情報を搬送する。
The base station 100-1 transmits system information including RACH information (S401). At this time, each of the plurality of three-dimensional beams formed by the directional antenna 101 carries RACH information indicating the RACH corresponding to itself.
端末装置200-1は、システム情報に含まれるRACH情報を取得する(S403)。そして、端末装置200-1は、RACH情報により示されるRACHでのランダムアクセス手続きを行う(S405)。即ち、端末装置200-1は、RACH情報により示されるRACHで、ランダムアクセスプリアンブルを送信する。
The terminal device 200-1 acquires RACH information included in the system information (S403). Then, the terminal device 200-1 performs a random access procedure on the RACH indicated by the RACH information (S405). That is, the terminal device 200-1 transmits a random access preamble on the RACH indicated by the RACH information.
その後、基地局100-1は、ランダム手続きが行われたRACHに基づいて、端末装置200-1宛の情報を送信するための3次元ビームの重み係数のセットを決定する(S407)。そして、基地局100-1は、決定された重み係数のセットを使用して、端末装置200-1と通信する(S409)。例えば、基地局100-1は、決定された重み係数のセットにより形成される3次元ビームによって、端末装置200-1宛の情報を送信する。
Thereafter, the base station 100-1 determines a set of three-dimensional beam weighting factors for transmitting information addressed to the terminal device 200-1 based on the RACH on which the random procedure has been performed (S407). Then, the base station 100-1 communicates with the terminal device 200-1 using the determined set of weighting factors (S409). For example, the base station 100-1 transmits information addressed to the terminal device 200-1 by a three-dimensional beam formed by the determined set of weighting factors.
(ランダムアクセス手続き)
図13は、第1の実施形態に係るランダムアクセス手続きの概略的な流れの一例を示すシーケンス図である。 (Random access procedure)
FIG. 13 is a sequence diagram illustrating an example of a schematic flow of a random access procedure according to the first embodiment.
図13は、第1の実施形態に係るランダムアクセス手続きの概略的な流れの一例を示すシーケンス図である。 (Random access procedure)
FIG. 13 is a sequence diagram illustrating an example of a schematic flow of a random access procedure according to the first embodiment.
まず、端末装置200-1は、RACH情報により示されるRACHで、ランダムアクセスプリアンブルを送信する(S421)。すると、基地局100-1は、端末装置200-1にランダムアクセス応答(Random Access Response)を送信する。
First, the terminal device 200-1 transmits a random access preamble using the RACH indicated by the RACH information (S421). Then, the base station 100-1 transmits a random access response (Random Access Response) to the terminal device 200-1.
その後、端末装置200-1は、RRC(Radio Resource Control)シグナリングにより、RRC接続要求(RRC Connection Request)を送信する(S425)。そして、基地局100-1は、RRCシグナリングにより、接続確立のためのセル設定情報などを含むRRC接続セットアップ(RRC Connection Setup)を送信する(S427)。
Thereafter, the terminal device 200-1 transmits an RRC connection request by RRC (Radio Resource Control) signaling (S425). Then, the base station 100-1 transmits an RRC connection setup including cell setting information for establishing a connection by RRC signaling (S427).
(基地局側の通信制御処理)
図14は、第1の実施形態に係る基地局側の通信制御処理の概略的な流れの一例を示すフローチャートである。 (Communication control processing on the base station side)
FIG. 14 is a flowchart illustrating an example of a schematic flow of communication control processing on the base station side according to the first embodiment.
図14は、第1の実施形態に係る基地局側の通信制御処理の概略的な流れの一例を示すフローチャートである。 (Communication control processing on the base station side)
FIG. 14 is a flowchart illustrating an example of a schematic flow of communication control processing on the base station side according to the first embodiment.
送信制御部153は、無線通信部120を介して、RACH情報を含むシステム情報を送信する(S441)。この際に、送信制御部153は、指向性アンテナ101により形成される複数の3次元ビームの各々が、自らに対応するRACHを示すRACH情報を搬送するように、RACH情報の送信を制御する。
The transmission control unit 153 transmits system information including RACH information via the wireless communication unit 120 (S441). At this time, the transmission control unit 153 controls the transmission of the RACH information so that each of the plurality of three-dimensional beams formed by the directional antenna 101 carries RACH information indicating the RACH corresponding to the transmission beam.
その後、ランダムアクセス手続きが行われると(S443:Yes)、送信制御部153は、ランダム手続きが行われたRACHに基づいて、端末装置200-1宛の情報を送信するための3次元ビームの重み係数のセットを決定する(S445)。そして、送信制御部153は、決定された重み係数のセットに対応するグループに端末装置200-1を登録する(S447)。当該グループごとに、同一の重み係数のセットが使用される。
Thereafter, when a random access procedure is performed (S443: Yes), the transmission control unit 153 weights the three-dimensional beam for transmitting information addressed to the terminal apparatus 200-1 based on the RACH for which the random procedure has been performed. A set of coefficients is determined (S445). Then, the transmission control unit 153 registers the terminal device 200-1 in a group corresponding to the determined set of weighting factors (S447). The same set of weighting factors is used for each group.
その後、システム情報の送信の周期が到来していれば(S449:Yes)、処理はステップS441へ戻り、そうでなければ(S449:No)、処理はステップS443へ戻る。
Thereafter, if the system information transmission cycle has arrived (S449: Yes), the process returns to step S441; otherwise (S449: No), the process returns to step S443.
なお、グループへの端末装置200-1登録は、所定の条件が満たされる場合に解除されてもよい。例えば、上記所定の条件は、所定の時間が経過することであってもよく、端末装置200-1が別のグループに登録されることであってもよく、又は別の条件であってもよい。
The registration of the terminal device 200-1 with the group may be canceled when a predetermined condition is satisfied. For example, the predetermined condition may be that a predetermined time elapses, the terminal device 200-1 may be registered in another group, or may be another condition. .
<<4.第2の実施形態>>
続いて、図15~図19を参照して、本開示の第2の実施形態を説明する。本開示の第2の実施形態によれば、指向性アンテナにより形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する。そして、いずれかのビーム識別情報が端末装置200により通知されると、通知される上記ビーム識別情報に基づいて、3次元ビームが決定される。すると決定された3次元ビームが、端末装置200宛の情報を搬送する。これにより、ビームフォーミングに関連する負荷を軽減することを可能になる。 << 4. Second Embodiment >>
Subsequently, a second embodiment of the present disclosure will be described with reference to FIGS. 15 to 19. According to the second embodiment of the present disclosure, each of a plurality of three-dimensional beams formed by a directional antenna carries beam identification information for identifying itself. When any of the beam identification information is notified by theterminal device 200, a three-dimensional beam is determined based on the notified beam identification information. Then, the determined three-dimensional beam carries information addressed to the terminal device 200. This makes it possible to reduce the load related to beam forming.
続いて、図15~図19を参照して、本開示の第2の実施形態を説明する。本開示の第2の実施形態によれば、指向性アンテナにより形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する。そして、いずれかのビーム識別情報が端末装置200により通知されると、通知される上記ビーム識別情報に基づいて、3次元ビームが決定される。すると決定された3次元ビームが、端末装置200宛の情報を搬送する。これにより、ビームフォーミングに関連する負荷を軽減することを可能になる。 << 4. Second Embodiment >>
Subsequently, a second embodiment of the present disclosure will be described with reference to FIGS. 15 to 19. According to the second embodiment of the present disclosure, each of a plurality of three-dimensional beams formed by a directional antenna carries beam identification information for identifying itself. When any of the beam identification information is notified by the
<4.1.基地局の構成>
まず、図15を参照して、第2の実施形態に係る基地局100-2の構成の一例を説明する。図15は、第2の実施形態に係る基地局100-2の構成の一例を示すブロック図である。図15を参照すると、基地局100-2は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部160及び処理部170を備える。 <4.1. Base station configuration>
First, an example of the configuration of the base station 100-2 according to the second embodiment will be described with reference to FIG. FIG. 15 is a block diagram showing an example of the configuration of the base station 100-2 according to the second embodiment. Referring to FIG. 15, the base station 100-2 includes anantenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 160, and a processing unit 170.
まず、図15を参照して、第2の実施形態に係る基地局100-2の構成の一例を説明する。図15は、第2の実施形態に係る基地局100-2の構成の一例を示すブロック図である。図15を参照すると、基地局100-2は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部160及び処理部170を備える。 <4.1. Base station configuration>
First, an example of the configuration of the base station 100-2 according to the second embodiment will be described with reference to FIG. FIG. 15 is a block diagram showing an example of the configuration of the base station 100-2 according to the second embodiment. Referring to FIG. 15, the base station 100-2 includes an
ここで、アンテナ部110、無線通信部120及びネットワーク通信部130については、第1の実施形態と第2の実施形態との間で差異はない。よって、ここでは、記憶部160及び処理部170を説明する。
Here, the antenna unit 110, the wireless communication unit 120, and the network communication unit 130 are not different between the first embodiment and the second embodiment. Therefore, here, the storage unit 160 and the processing unit 170 will be described.
(記憶部160)
記憶部160は、基地局100-2の動作のためのプログラム及びデータを記憶する。 (Storage unit 160)
Thestorage unit 160 stores a program and data for the operation of the base station 100-2.
記憶部160は、基地局100-2の動作のためのプログラム及びデータを記憶する。 (Storage unit 160)
The
とりわけ第2の実施形態では、例えば、記憶部160は、3次元ビームを形成可能な指向性アンテナ101により形成される複数の3次元ビームの各々を識別するためのビーム識別情報を記憶する。
Particularly in the second embodiment, for example, the storage unit 160 stores beam identification information for identifying each of a plurality of three-dimensional beams formed by the directional antenna 101 capable of forming a three-dimensional beam.
(処理部170)
処理部170は、基地局100-2の様々な機能を提供する。処理部170は、情報取得部171及び送信制御部173を含む。 (Processor 170)
Theprocessing unit 170 provides various functions of the base station 100-2. The processing unit 170 includes an information acquisition unit 171 and a transmission control unit 173.
処理部170は、基地局100-2の様々な機能を提供する。処理部170は、情報取得部171及び送信制御部173を含む。 (Processor 170)
The
(情報取得部171)
情報取得部171は、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々を識別するためのビーム識別情報を取得する。 (Information acquisition unit 171)
Theinformation acquisition unit 171 acquires beam identification information for identifying each of a plurality of three-dimensional beams formed by a directional antenna that can form a three-dimensional beam.
情報取得部171は、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々を識別するためのビーム識別情報を取得する。 (Information acquisition unit 171)
The
具体例として、図8を再び参照すると、情報取得部171は、3次元ビーム20Aを識別するための第1のビーム識別情報、及び、3次元ビーム20Bを識別するための第2のビーム識別情報を取得する。
As a specific example, referring to FIG. 8 again, the information acquisition unit 171 includes first beam identification information for identifying the three-dimensional beam 20A and second beam identification information for identifying the three-dimensional beam 20B. To get.
上記複数の3次元ビームは、例えば、重み係数の異なるセットにより形成される3次元ビームである。そして、上記複数の3次元ビームの各々を識別するためのビーム識別情報は、上記複数の3次元ビームの各々を形成するための重み係数のセットを識別するための情報である。
The plurality of three-dimensional beams are, for example, three-dimensional beams formed by sets having different weighting factors. The beam identification information for identifying each of the plurality of three-dimensional beams is information for identifying a set of weighting factors for forming each of the plurality of three-dimensional beams.
具体例として、図8を再び参照すると、情報取得部151は、3次元ビーム20Aを形成するための重み係数のセットを識別するための第1のビーム識別情報、及び、3次元ビーム20Bを形成するための重み係数のセットを識別するための第2のビーム識別情報を取得する。
As a specific example, referring to FIG. 8 again, the information acquisition unit 151 forms first beam identification information for identifying a set of weighting factors for forming the three-dimensional beam 20A, and the three-dimensional beam 20B. Second beam identification information for identifying a set of weighting factors to be acquired is acquired.
上記複数の3次元ビームの各々を識別するための上記ビーム識別情報は、例えば、システム情報の一部として送信される情報である。これにより、例えば、接続状態ではない端末装置200-2(例えば、アイドル状態である端末装置200-2)にもビーム識別情報を知らせることが可能になる。また、例えば、ビーム識別情報を、個別の端末装置200-2へ通知するのではなく、不特定の端末装置200-2へ報知することが可能になる。具体的には、例えば、上記システム情報の上記一部は、システム情報に新たに追加される情報である。
The beam identification information for identifying each of the plurality of three-dimensional beams is information transmitted as part of system information, for example. Thereby, for example, it becomes possible to notify the beam identification information to the terminal device 200-2 that is not in the connected state (for example, the terminal device 200-2 that is in the idle state). Further, for example, the beam identification information can be notified to an unspecified terminal device 200-2 instead of being notified to the individual terminal device 200-2. Specifically, for example, the part of the system information is information newly added to the system information.
なお、上記複数の3次元ビームは、頻繁に使用される3次元ビームであってもよい。即ち、上記複数の3次元ビームは、頻繁に使用される重み係数のセットにより形成される3次元ビームであってもよい。
The plurality of three-dimensional beams may be frequently used three-dimensional beams. That is, the plurality of three-dimensional beams may be three-dimensional beams formed by a frequently used set of weighting factors.
(送信制御部173)
送信制御部173は、基地局100-2による送信を制御する。例えば、送信制御部173は、アンテナ素子ごとの信号に重み係数を乗算することにより、指向性アンテナ101にビームを形成させる。 (Transmission control unit 173)
Thetransmission control unit 173 controls transmission by the base station 100-2. For example, the transmission control unit 173 causes the directional antenna 101 to form a beam by multiplying a signal for each antenna element by a weighting factor.
送信制御部173は、基地局100-2による送信を制御する。例えば、送信制御部173は、アンテナ素子ごとの信号に重み係数を乗算することにより、指向性アンテナ101にビームを形成させる。 (Transmission control unit 173)
The
-ビーム識別情報の送信制御
送信制御部173は、上記複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を送信するように、上記複数の3次元ビームの各々を識別するための上記ビーム識別情報の送信を制御する。 -Transmission control of beam identification information Thetransmission control unit 173 identifies each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams transmits beam identification information for identifying itself. The transmission of the beam identification information is controlled.
送信制御部173は、上記複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を送信するように、上記複数の3次元ビームの各々を識別するための上記ビーム識別情報の送信を制御する。 -Transmission control of beam identification information The
具体例として、図8を再び参照すると、送信制御部173による送信制御により、3次元ビーム20Aが、3次元ビーム20Aを識別するための第1のビーム識別情報を搬送する。また、送信制御部173による送信制御により、3次元ビーム20Bが、3次元ビーム20Bを識別するための第2のビーム識別情報を搬送する。即ち、第1のビーム識別情報には、3次元ビーム20Aを形成するための重み係数のセットが乗算され、第2のビーム識別情報には、3次元ビーム20Bを形成するための重み係数のセットが乗算される。
As a specific example, referring again to FIG. 8, transmission control by the transmission control unit 173 causes the three-dimensional beam 20A to carry first beam identification information for identifying the three-dimensional beam 20A. Further, the transmission control by the transmission control unit 173 causes the three-dimensional beam 20B to carry second beam identification information for identifying the three-dimensional beam 20B. That is, the first beam identification information is multiplied by a set of weighting factors for forming the three-dimensional beam 20A, and the second beam identification information is set by a weighting factor for forming the three-dimensional beam 20B. Is multiplied.
これにより、端末装置200-2は、端末装置200-2に届く3次元ビーム20から、当該3次元ビーム20を識別するためのビーム識別情報を取得することが可能になる。例えば、図8を参照すると、端末装置200Aは、端末装置200Aに届く3次元ビーム20Aを識別するための第1のビーム識別情報を取得し、端末装置200Bは、端末装置200Bに届く3次元ビーム20Bを識別するための第2のビーム識別情報を取得する。
As a result, the terminal device 200-2 can acquire the beam identification information for identifying the three-dimensional beam 20 from the three-dimensional beam 20 reaching the terminal device 200-2. For example, referring to FIG. 8, the terminal device 200A acquires first beam identification information for identifying the three-dimensional beam 20A reaching the terminal device 200A, and the terminal device 200B receives the three-dimensional beam reaching the terminal device 200B. Second beam identification information for identifying 20B is acquired.
上述したように、例えば、上記ビーム識別情報は、例えば、システム情報の一部として送信される情報である。この場合に、送信制御部173は、例えば、上記複数の3次元ビームの各々が、上記システム情報の上記一部として、自らを識別するためのビーム識別情報を搬送するように、上記複数の3次元ビームの各々を識別するための上記ビーム識別情報の送信を制御する。
As described above, for example, the beam identification information is information transmitted as part of system information, for example. In this case, for example, the transmission control unit 173 transmits the plurality of 3D beams so that each of the plurality of 3D beams carries beam identification information for identifying itself as the part of the system information. The transmission of the beam identification information for identifying each dimension beam is controlled.
具体例として、図8を再び参照すると、送信制御部173による制御により、3次元ビーム20Aは、システム情報の一部として、3次元ビーム20Aを識別するための第1のビーム識別情報を搬送する。一方、3次元ビーム20Bは、上記システム情報の上記一部として、3次元ビーム20Bを識別するための第2のビーム識別情報を搬送する。このように、同一の無線リソースにおいて、異なる3次元ビームが、異なるビーム識別情報を搬送する。即ち、異なるビーム識別情報が、異なる重み係数のセットの乗算により、同一の無線リソースで送信される。
As a specific example, referring again to FIG. 8, the three-dimensional beam 20 </ b> A carries first beam identification information for identifying the three-dimensional beam 20 </ b> A as part of the system information under the control of the transmission control unit 173. . On the other hand, the three-dimensional beam 20B carries second beam identification information for identifying the three-dimensional beam 20B as the part of the system information. In this way, different three-dimensional beams carry different beam identification information in the same radio resource. That is, different beam identification information is transmitted on the same radio resource by multiplying different sets of weighting factors.
これにより、端末装置200-2は、システム情報から、端末装置200-2に届く3次元ビーム20を識別するためのビーム識別情報を取得することが可能になる。例えば、図8を参照すると、端末装置200Aは、システム情報から、3次元ビーム20Aを識別するための第1のビーム識別情報を取得する。一方、端末装置200Bは、システム情報から、3次元ビーム20Bを識別するための第2のビーム識別情報を取得する。
As a result, the terminal device 200-2 can acquire beam identification information for identifying the three-dimensional beam 20 reaching the terminal device 200-2 from the system information. For example, referring to FIG. 8, the terminal device 200A acquires first beam identification information for identifying the three-dimensional beam 20A from the system information. On the other hand, the terminal device 200B acquires second beam identification information for identifying the three-dimensional beam 20B from the system information.
-スケジューリング情報の送信制御
例えば、送信制御部173は、上記複数の3次元ビームの各々が、上記システム情報の上記一部を含む情報の送信のために割り当てられる無線リソースを示す情報(以下、「スケジューリング情報」と呼ぶ)を搬送するように、上記スケジューリング情報の送信を制御する。例えば、上記スケジューリング情報は、システム情報に関するダウンリンク制御情報(DCI)である。 -Scheduling information transmission control For example, thetransmission control unit 173 may transmit information indicating radio resources to which each of the plurality of three-dimensional beams is allocated for transmission of information including the part of the system information (hereinafter, " The transmission of the scheduling information is controlled so as to carry “scheduling information”. For example, the scheduling information is downlink control information (DCI) related to system information.
例えば、送信制御部173は、上記複数の3次元ビームの各々が、上記システム情報の上記一部を含む情報の送信のために割り当てられる無線リソースを示す情報(以下、「スケジューリング情報」と呼ぶ)を搬送するように、上記スケジューリング情報の送信を制御する。例えば、上記スケジューリング情報は、システム情報に関するダウンリンク制御情報(DCI)である。 -Scheduling information transmission control For example, the
具体的には、例えば、システム情報の送信のために割り当てられる無線リソースを示すスケジューリング情報(DCI)は、SI-RNTIを使用してコーディングされ、PDCCH0で送信される。端末装置200-2は、上記SI-RNTIを使用して上記スケジューリング情報(DCI)をデコーディングすることにより、スケジューリング情報を取得し、当該スケジューリング情報により示される無線リソースで送信されるシステム情報を取得する。とりわけ第2の実施形態では、例えば、上述したように、基地局100-2は、システム情報のうちのビーム識別情報を、3次元ビームによって送信する。そして、さらに、第2の実施形態では、例えば、基地局100-2は、上記ビーム識別情報を含むシステム情報の送信のために割り当てられた無線リソースを示すスケジューリング情報(DCI)も、3次元ビームによって送信する。
Specifically, for example, scheduling information (DCI) indicating radio resources allocated for transmission of system information is coded using SI-RNTI and is transmitted on PDCCH0. The terminal device 200-2 acquires scheduling information by decoding the scheduling information (DCI) using the SI-RNTI, and acquires system information transmitted by the radio resource indicated by the scheduling information. To do. In particular, in the second embodiment, for example, as described above, the base station 100-2 transmits the beam identification information in the system information using a three-dimensional beam. Further, in the second embodiment, for example, the base station 100-2 also transmits scheduling information (DCI) indicating radio resources allocated for transmission of system information including the beam identification information to the three-dimensional beam. Send by.
図11の例を第2の実施形態に適用すると、例えば、基地局100-2は、ビーム識別情報を含むシステム情報を、サブフレーム43BのPDSCH53に含まれる無線リソース55において、3次元ビームによって送信する。また、基地局100-2は、無線リソース55を示すスケジューリング情報も、サブフレーム43BのPDCCH57に含まれる無線リソース59において、3次元ビームによって送信する。
When the example of FIG. 11 is applied to the second embodiment, for example, the base station 100-2 transmits system information including beam identification information using a three-dimensional beam in the radio resource 55 included in the PDSCH 53 of the subframe 43B. To do. In addition, the base station 100-2 also transmits scheduling information indicating the radio resource 55 using a three-dimensional beam on the radio resource 59 included in the PDCCH 57 of the subframe 43B.
これにより、例えば、端末装置200-2は、ビーム識別情報をより確実に取得することが可能になる。具体的には、例えば、端末装置200-2は、セルエッジに位置し、3次元ビームによって送信されるビーム識別情報を受信可能であるが、当該ビーム識別情報のスケジューリング情報が受信不能である場合には、結果として、ビーム識別情報を取得することができない。しかし、ビーム識別情報のスケジューリング情報も3次元ビームによって送信されれば、端末装置200-2は、当該スケジューリング情報をより確実に取得することができ、結果としてビーム識別情報をより確実に取得することができる。
Thus, for example, the terminal device 200-2 can acquire the beam identification information more reliably. Specifically, for example, when the terminal device 200-2 is located at the cell edge and can receive the beam identification information transmitted by the three-dimensional beam, the scheduling information of the beam identification information cannot be received. As a result, beam identification information cannot be acquired. However, if the scheduling information of the beam identification information is also transmitted by the three-dimensional beam, the terminal device 200-2 can acquire the scheduling information more reliably, and as a result, more reliably acquire the beam identification information. Can do.
なお、スケジューリング情報は、SI-RNTIを使用してコーディングされる代わりに、別に用意されたRNTIを使用してコーディングされてもよい。当該RNTIは、基地局100-1により報知されてもよく、又は、基地局100-1により端末装置200-1に個別にシグナリングで通知されてもよい。
Note that the scheduling information may be coded using a separately prepared RNTI instead of coding using the SI-RNTI. The RNTI may be notified by the base station 100-1, or may be notified individually by the base station 100-1 to the terminal device 200-1 through signaling.
-端末装置宛の情報の送信制御
送信制御部173は、いずれかのビーム識別情報が端末装置200-2により通知されると、通知される上記ビーム識別情報に基づき決定される3次元ビームが、端末装置200-2宛の情報を搬送するように、端末装置200-2宛の上記情報の送信を制御する。 -Transmission control of information addressed to terminal device When any of the beam identification information is notified by the terminal device 200-2, thetransmission control unit 173 determines that the three-dimensional beam determined based on the notified beam identification information is The transmission of the information addressed to the terminal device 200-2 is controlled so as to carry the information addressed to the terminal device 200-2.
送信制御部173は、いずれかのビーム識別情報が端末装置200-2により通知されると、通知される上記ビーム識別情報に基づき決定される3次元ビームが、端末装置200-2宛の情報を搬送するように、端末装置200-2宛の上記情報の送信を制御する。 -Transmission control of information addressed to terminal device When any of the beam identification information is notified by the terminal device 200-2, the
例えば、通知される上記ビーム識別情報に基づき決定される上記3次元ビームは、通知される上記ビーム識別情報から識別される3次元ビーム、又は通知される当該ビーム識別情報から識別される当該3次元ビームに基づき決定される3次元ビームである。
For example, the three-dimensional beam determined based on the notified beam identification information is a three-dimensional beam identified from the notified beam identification information, or the three-dimensional identified from the notified beam identification information. This is a three-dimensional beam determined based on the beam.
具体的には、例えば、重み係数のセットを識別するためのビーム識別情報が、重み係数の当該セットにより形成される3次元ビームによって送信される。すると、端末装置200-2は、当該3次元ビームによって送信されるビーム識別情報を受信する。そして、端末装置200-2は、当該ビーム識別情報を基地局100-2に通知する。その後、基地局100-2(送信制御部173)は、通知されたビーム識別情報から識別される重み係数のセットを、端末装置200-2宛の情報を送信するための重み係数のセットとして決定する。このように、端末装置200-2に届く3次元ビームの重み係数が、通知されたビーム識別情報から判明し、端末装置200-2宛の情報を送信するための重み係数のセットとして決定される。そして、基地局100-2は、決定された重み係数のセットを使用して形成される3次元ビームによって、端末装置200-2宛の情報を送信する。
Specifically, for example, beam identification information for identifying a set of weighting factors is transmitted by a three-dimensional beam formed by the set of weighting factors. Then, the terminal device 200-2 receives the beam identification information transmitted by the three-dimensional beam. Then, the terminal apparatus 200-2 notifies the beam identification information to the base station 100-2. Thereafter, base station 100-2 (transmission control unit 173) determines a set of weighting factors identified from the notified beam identification information as a set of weighting factors for transmitting information addressed to terminal device 200-2. To do. As described above, the weighting factor of the three-dimensional beam reaching the terminal device 200-2 is determined from the notified beam identification information, and is determined as a set of weighting factors for transmitting information addressed to the terminal device 200-2. . Then, the base station 100-2 transmits information addressed to the terminal device 200-2 by a three-dimensional beam formed using the determined set of weighting factors.
これにより、例えば、ビームフォーミングに関連する負荷を軽減することが可能になる。一例として、基地局100-2及び端末装置200-2は重み係数のセットを算出する必要はないので、基地局100-2が有するアンテナ素子の数が増加したとしても、端末装置200-2及び基地局100-2の処理の観点での負荷は増加しない。また、別の例として、コードブックインデックスの通知の代わりに、よりビット数の少ないビーム識別情報が通知されるので、オーバーヘッドが減少し、無線リソースの観点での負荷が減少する。また、さらに別の例として、基地局100-2が有するアンテナ素子の数が増加したとしても、リファレンス信号の数を増やさなくてもよいので、オーバーヘッドが減少し、無線リソースの観点での負荷が減少する。例えばこのように、処理又は無線リソースなどの観点から、ビームフォーミングに関連する負荷が軽減され得る。
This makes it possible, for example, to reduce the load related to beam forming. As an example, since the base station 100-2 and the terminal device 200-2 do not need to calculate a set of weighting factors, even if the number of antenna elements included in the base station 100-2 increases, the terminal device 200-2 and the terminal device 200-2 The load from the viewpoint of processing of the base station 100-2 does not increase. As another example, since the beam identification information with a smaller number of bits is notified instead of the codebook index notification, the overhead is reduced and the load in terms of radio resources is reduced. As yet another example, even if the number of antenna elements included in the base station 100-2 increases, it is not necessary to increase the number of reference signals, thereby reducing overhead and increasing the load in terms of radio resources. Decrease. For example, in this way, the load related to beamforming can be reduced from the viewpoint of processing or radio resources.
なお、基地局100-2により送信されるビーム識別情報と、端末装置200-2により通知されるビーム識別情報とは、同一の形式であってもよく、又は別の形式であってもよい。一例として、端末装置200-2は、基地局100-2により送信される第1の形式のビーム識別情報を取得し、当該第1の形式のビーム識別情報をそのまま基地局100-2に通知してもよい。また、別の例として、端末装置200-2は、基地局100-2により送信される第1の形式のビーム識別情報を取得し、第2の形式のビーム識別情報を基地局100-2に通知してもよい。この場合に、第1の形式のビーム識別情報及び第2の形式のビーム識別情報からは、同一の3次元ビーム(同一の重み係数のセット)が識別される。
Note that the beam identification information transmitted by the base station 100-2 and the beam identification information notified by the terminal device 200-2 may have the same format or different formats. As an example, the terminal device 200-2 acquires the first type of beam identification information transmitted by the base station 100-2, and notifies the base station 100-2 of the first type of beam identification information as it is. May be. As another example, the terminal device 200-2 acquires the first type of beam identification information transmitted by the base station 100-2, and sends the second type of beam identification information to the base station 100-2. You may be notified. In this case, the same three-dimensional beam (the same set of weighting factors) is identified from the beam identification information of the first format and the beam identification information of the second format.
<4.2.端末装置の構成>
次に、図16を参照して、第2の実施形態に係る端末装置200-2の構成の一例を説明する。図16は、第2の実施形態に係る端末装置200-2の構成の一例を示すブロック図である。図16を参照すると、端末装置200-2は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部260を備える。 <4.2. Configuration of terminal device>
Next, an example of the configuration of the terminal device 200-2 according to the second embodiment will be described with reference to FIG. FIG. 16 is a block diagram illustrating an example of a configuration of the terminal device 200-2 according to the second embodiment. Referring to FIG. 16, the terminal device 200-2 includes anantenna unit 210, a wireless communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 260.
次に、図16を参照して、第2の実施形態に係る端末装置200-2の構成の一例を説明する。図16は、第2の実施形態に係る端末装置200-2の構成の一例を示すブロック図である。図16を参照すると、端末装置200-2は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部260を備える。 <4.2. Configuration of terminal device>
Next, an example of the configuration of the terminal device 200-2 according to the second embodiment will be described with reference to FIG. FIG. 16 is a block diagram illustrating an example of a configuration of the terminal device 200-2 according to the second embodiment. Referring to FIG. 16, the terminal device 200-2 includes an
(アンテナ部210)
アンテナ部210は、無線通信部220により出力される信号を電波として空間に放射する。また、アンテナ部210は、空間の電波を信号に変換し、当該信号を無線通信部220へ出力する。 (Antenna unit 210)
Theantenna unit 210 radiates the signal output from the wireless communication unit 220 to the space as a radio wave. Further, the antenna unit 210 converts a radio wave in the space into a signal and outputs the signal to the wireless communication unit 220.
アンテナ部210は、無線通信部220により出力される信号を電波として空間に放射する。また、アンテナ部210は、空間の電波を信号に変換し、当該信号を無線通信部220へ出力する。 (Antenna unit 210)
The
(無線通信部220)
無線通信部220は、無線通信を行う。例えば、無線通信部220は、端末装置200-2がセル10内に位置する場合に、基地局100-2からのダウンリンク信号を受信し、基地局100-2へのアップリンク信号を送信する。 (Wireless communication unit 220)
Thewireless communication unit 220 performs wireless communication. For example, when the terminal device 200-2 is located in the cell 10, the wireless communication unit 220 receives a downlink signal from the base station 100-2 and transmits an uplink signal to the base station 100-2. .
無線通信部220は、無線通信を行う。例えば、無線通信部220は、端末装置200-2がセル10内に位置する場合に、基地局100-2からのダウンリンク信号を受信し、基地局100-2へのアップリンク信号を送信する。 (Wireless communication unit 220)
The
(記憶部230)
記憶部230は、端末装置200-2の動作のためのプログラム及びデータを記憶する。 (Storage unit 230)
Thestorage unit 230 stores a program and data for the operation of the terminal device 200-2.
記憶部230は、端末装置200-2の動作のためのプログラム及びデータを記憶する。 (Storage unit 230)
The
(入力部240)
入力部240は、端末装置200-2のユーザによる入力を受け付ける。そして、入力部240は、入力結果を処理部260に提供する。 (Input unit 240)
Theinput unit 240 receives input from the user of the terminal device 200-2. Then, the input unit 240 provides the input result to the processing unit 260.
入力部240は、端末装置200-2のユーザによる入力を受け付ける。そして、入力部240は、入力結果を処理部260に提供する。 (Input unit 240)
The
(表示部250)
表示部250は、端末装置200-2のユーザに見せるための画面を表示する。例えば、表示部250は、処理部260(表示制御部265)による制御に応じて、上記画面を表示する。 (Display unit 250)
Thedisplay unit 250 displays a screen for showing to the user of the terminal device 200-2. For example, the display unit 250 displays the screen according to control by the processing unit 260 (display control unit 265).
表示部250は、端末装置200-2のユーザに見せるための画面を表示する。例えば、表示部250は、処理部260(表示制御部265)による制御に応じて、上記画面を表示する。 (Display unit 250)
The
(処理部260)
処理部260は、端末装置200-2の様々な機能を提供する。処理部260は、情報取得部261、通知部263及び表示制御部265を含む。 (Processing unit 260)
Theprocessing unit 260 provides various functions of the terminal device 200-2. The processing unit 260 includes an information acquisition unit 261, a notification unit 263, and a display control unit 265.
処理部260は、端末装置200-2の様々な機能を提供する。処理部260は、情報取得部261、通知部263及び表示制御部265を含む。 (Processing unit 260)
The
(情報取得部261)
上述したように、3次元ビームを形成可能な指向性アンテナ101により形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する。この場合に、情報取得部261は、上記複数の3次元ビームのうちのいずれかの3次元ビームを識別するためのビーム識別情報を取得する (Information acquisition unit 261)
As described above, each of a plurality of three-dimensional beams formed by thedirectional antenna 101 capable of forming a three-dimensional beam carries beam identification information for identifying itself. In this case, the information acquisition unit 261 acquires beam identification information for identifying any three-dimensional beam among the plurality of three-dimensional beams.
上述したように、3次元ビームを形成可能な指向性アンテナ101により形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する。この場合に、情報取得部261は、上記複数の3次元ビームのうちのいずれかの3次元ビームを識別するためのビーム識別情報を取得する (Information acquisition unit 261)
As described above, each of a plurality of three-dimensional beams formed by the
上述したように、例えば、上記ビーム識別情報は、システム情報の一部として送信される情報である。この場合に、情報取得部261は、システム情報を取得すると、当該システム情報に含まれるビーム識別情報を取得する。取得されるビーム識別情報は、端末装置200-2に届く3次元ビームを識別するための情報である。
As described above, for example, the beam identification information is information transmitted as part of the system information. In this case, when acquiring the system information, the information acquisition unit 261 acquires the beam identification information included in the system information. The acquired beam identification information is information for identifying a three-dimensional beam that reaches the terminal device 200-2.
(通知部263)
通知部263は、取得される上記ビーム識別情報を通知する。例えば、通知部263は、ビーム識別情報が取得されると、無線通信部120を介して当該ビーム識別情報を基地局100-2に通知する。 (Notification unit 263)
Thenotification unit 263 notifies the acquired beam identification information. For example, when the beam identification information is acquired, the notification unit 263 notifies the base station 100-2 of the beam identification information via the wireless communication unit 120.
通知部263は、取得される上記ビーム識別情報を通知する。例えば、通知部263は、ビーム識別情報が取得されると、無線通信部120を介して当該ビーム識別情報を基地局100-2に通知する。 (Notification unit 263)
The
通知部263は、通信状態の報告の一部として、ビーム識別情報を基地局100-2に通知してもよく、シグナリングによる基地局100-2からの問合せに対する応答として、ビーム識別情報を基地局100-2に通知してもよい。
The notification unit 263 may notify the beam identification information to the base station 100-2 as part of the communication status report, and the beam identification information as a response to the inquiry from the base station 100-2 by signaling. You may notify to 100-2.
なお、上述したように、通知される上記ビーム識別情報は、端末装置200-2宛の情報を搬送する3次元ビームを決定するために用いられる情報である。
As described above, the beam identification information to be notified is information used to determine a three-dimensional beam carrying information addressed to the terminal device 200-2.
(表示制御部265)
表示制御部265は、表示部250による出力画面の表示を制御する。例えば、表示制御部265は、表示部250により表示される出力画面を生成し、当該出力画面を表示部250に表示させる。 (Display control unit 265)
Thedisplay control unit 265 controls display of the output screen by the display unit 250. For example, the display control unit 265 generates an output screen displayed by the display unit 250 and causes the display unit 250 to display the output screen.
表示制御部265は、表示部250による出力画面の表示を制御する。例えば、表示制御部265は、表示部250により表示される出力画面を生成し、当該出力画面を表示部250に表示させる。 (Display control unit 265)
The
<4.3.処理の流れ>
次に、図17~図19を参照して、第2の実施形態に係る通信制御処理の例を説明する。 <4.3. Flow of processing>
Next, an example of a communication control process according to the second embodiment will be described with reference to FIGS.
次に、図17~図19を参照して、第2の実施形態に係る通信制御処理の例を説明する。 <4.3. Flow of processing>
Next, an example of a communication control process according to the second embodiment will be described with reference to FIGS.
(全体の処理の流れ)
図17は、第2の実施形態に係る通信制御処理全体の概略的な流れの一例を示すシーケンス図である。 (Overall process flow)
FIG. 17 is a sequence diagram illustrating an example of a schematic flow of the entire communication control process according to the second embodiment.
図17は、第2の実施形態に係る通信制御処理全体の概略的な流れの一例を示すシーケンス図である。 (Overall process flow)
FIG. 17 is a sequence diagram illustrating an example of a schematic flow of the entire communication control process according to the second embodiment.
基地局100-2及び端末装置200-2は、互いに通信している(S501)。そして、基地局100-2は、ビーム識別情報を含むシステム情報を送信する(S503)。この際に、指向性アンテナ101により形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する。
The base station 100-2 and the terminal device 200-2 are communicating with each other (S501). Then, the base station 100-2 transmits system information including beam identification information (S503). At this time, each of the plurality of three-dimensional beams formed by the directional antenna 101 carries beam identification information for identifying itself.
端末装置200-2は、システム情報に含まれるビーム識別情報を取得する(S505)。そして、端末装置200-2は、取得した上記ビーム識別情報を基地局100-2に通知する(S507)。
The terminal device 200-2 acquires the beam identification information included in the system information (S505). Then, the terminal device 200-2 notifies the acquired beam identification information to the base station 100-2 (S507).
その後、基地局100-2は、通知されたビーム識別情報に基づいて、端末装置200-2宛の情報を送信するための3次元ビームの重み係数のセットを決定する(S509)。この際に、基地局100-2は、決定された重み係数のセットに対応するグループに端末装置200-2を登録する。そして、基地局100-2は、決定された重み係数のセットを使用して、端末装置200-2と通信する(S511)。例えば、基地局100-2は、決定された重み係数のセットにより形成される3次元ビームによって、端末装置200-2宛の情報を送信する。
Thereafter, the base station 100-2 determines a set of three-dimensional beam weighting factors for transmitting information addressed to the terminal device 200-2 based on the notified beam identification information (S509). At this time, the base station 100-2 registers the terminal device 200-2 in a group corresponding to the determined set of weighting factors. Then, the base station 100-2 communicates with the terminal device 200-2 using the determined set of weighting factors (S511). For example, the base station 100-2 transmits information addressed to the terminal device 200-2 by a three-dimensional beam formed by the determined set of weighting factors.
さらに、例えば、基地局100-2は、継続して、ビーム識別情報を含むシステム情報を送信する(S513、S515)。そして、基地局100-2は、端末装置200-2からのビーム識別情報の通知がなければ、端末装置200-2について3次元ビームの重み係数のセットの使用を停止する(S517)。例えば、端末装置200-2のグループへの登録を解除することにより、端末装置200-2について3次元ビームの重み係数のセットの使用が停止される。
Further, for example, the base station 100-2 continuously transmits system information including beam identification information (S513, S515). If there is no notification of the beam identification information from the terminal device 200-2, the base station 100-2 stops using the set of three-dimensional beam weighting factors for the terminal device 200-2 (S517). For example, by canceling the registration of the terminal device 200-2 to the group, the use of the set of weighting factors of the three-dimensional beam is stopped for the terminal device 200-2.
(基地局側の通信制御処理)
図18は、第2の実施形態に係る基地局側の通信制御処理の概略的な流れの一例を示すフローチャートである。 (Communication control processing on the base station side)
FIG. 18 is a flowchart illustrating an example of a schematic flow of communication control processing on the base station side according to the second embodiment.
図18は、第2の実施形態に係る基地局側の通信制御処理の概略的な流れの一例を示すフローチャートである。 (Communication control processing on the base station side)
FIG. 18 is a flowchart illustrating an example of a schematic flow of communication control processing on the base station side according to the second embodiment.
送信制御部173は、無線通信部120を介して、ビーム識別情報を含むシステム情報を送信する(S541)。この際に、送信制御部173は、指向性アンテナ101により形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送するように、ビーム識別情報の送信を制御する。
The transmission control unit 173 transmits system information including beam identification information via the wireless communication unit 120 (S541). At this time, the transmission control unit 173 controls transmission of the beam identification information so that each of the plurality of three-dimensional beams formed by the directional antenna 101 carries beam identification information for identifying itself. .
その後、ビーム識別情報が端末装置200-2により通知されると(S543:Yes)、送信制御部173は、通知されたビーム識別情報に基づいて、端末装置200-2宛の情報を送信するための3次元ビームの重み係数のセットを決定する(S545)。そして、送信制御部173は、決定された重み係数のセットに対応するグループに端末装置200-2を登録する(S547)。当該グループごとに、同一の重み係数のセットが使用される。
Thereafter, when the beam identification information is notified by the terminal device 200-2 (S543: Yes), the transmission control unit 173 transmits information addressed to the terminal device 200-2 based on the notified beam identification information. A set of weighting factors of the three-dimensional beam is determined (S545). Then, the transmission control unit 173 registers the terminal device 200-2 in the group corresponding to the determined set of weighting factors (S547). The same set of weighting factors is used for each group.
その後、システム情報の送信の周期が到来していなければ(S549:No)、処理はステップS543へ戻る。一方、システム情報の送信の周期が到来していれば(S549:Yes)、送信制御部173は、ビーム識別情報を通知しない端末装置200-2のグループへの登録を解除する。これにより、端末装置200-2について3次元ビームの重み係数のセットの使用が停止される。そして、処理はステップS541へ戻る。
Thereafter, if the system information transmission cycle has not arrived (S549: No), the processing returns to step S543. On the other hand, if the transmission period of the system information has arrived (S549: Yes), the transmission control unit 173 cancels the registration of the terminal device 200-2 that does not notify the beam identification information to the group. As a result, the use of the set of three-dimensional beam weighting coefficients for the terminal device 200-2 is stopped. Then, the process returns to step S541.
(端末装置側の通信制御処理)
図19は、第2の実施形態に係る端末装置側の通信制御処理の概略的な流れの一例を示すフローチャートである。 (Communication control processing on the terminal device side)
FIG. 19 is a flowchart illustrating an example of a schematic flow of communication control processing on the terminal device side according to the second embodiment.
図19は、第2の実施形態に係る端末装置側の通信制御処理の概略的な流れの一例を示すフローチャートである。 (Communication control processing on the terminal device side)
FIG. 19 is a flowchart illustrating an example of a schematic flow of communication control processing on the terminal device side according to the second embodiment.
情報取得部261は、システム情報を取得する(S541)。
The information acquisition unit 261 acquires system information (S541).
システム情報の中にビーム識別情報が含まれ、情報取得部261がビーム識別情報を取得した場合に(S543:Yes)には、通知部263は、無線通信部220を介して、取得されたビーム識別情報を基地局100-2に通知する(S545)。そして、処理は終了する。
When the beam identification information is included in the system information and the information acquisition unit 261 acquires the beam identification information (S543: Yes), the notification unit 263 transmits the acquired beam via the wireless communication unit 220. The identification information is notified to the base station 100-2 (S545). Then, the process ends.
また、システム情報の中にビーム識別情報が含まれず、情報取得部261がビーム識別情報を取得しなかった場合にも(S543:No)、処理は終了する。
Also, when the beam identification information is not included in the system information and the information acquisition unit 261 does not acquire the beam identification information (S543: No), the processing ends.
<<5.本開示の実施形態に共通の技術的特徴>>
続いて、本開示の実施携帯に共通の技術的特徴を説明する。 << 5. Technical features common to the embodiments of the present disclosure >>
Subsequently, technical features common to the mobile phone of the present disclosure will be described.
続いて、本開示の実施携帯に共通の技術的特徴を説明する。 << 5. Technical features common to the embodiments of the present disclosure >>
Subsequently, technical features common to the mobile phone of the present disclosure will be described.
本開示の第1の実施形態及び第2の実施形態を上述した。しかしながら、本開示の実施形態に係る技術的特徴は、上述した例に限定されない。本開示の実施形態は、例えば以下のように、第1の実施形態に係る技術的特徴及び第2の実施形態に係る技術的特徴を包含する技術的特徴を有する。
The first embodiment and the second embodiment of the present disclosure have been described above. However, the technical features according to the embodiment of the present disclosure are not limited to the above-described examples. Embodiments of the present disclosure have technical features including the technical features according to the first embodiment and the technical features according to the second embodiment, for example, as follows.
-第1の共通の技術的特徴
情報取得部は、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する。送信制御部は、上記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する。さらに、送信制御部は、いずれかのビーム固有情報に対応するフィードバックが上記端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、上記端末装置宛の情報を搬送するように、上記端末装置宛の上記情報の送信を制御する。 First common technical feature The information acquisition unit acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam. The transmission control unit controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the transmission control unit. Further, when the feedback corresponding to any of the beam specific information is performed by the terminal device, the transmission control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. The transmission of the information addressed to the terminal device is controlled.
情報取得部は、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する。送信制御部は、上記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する。さらに、送信制御部は、いずれかのビーム固有情報に対応するフィードバックが上記端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、上記端末装置宛の情報を搬送するように、上記端末装置宛の上記情報の送信を制御する。 First common technical feature The information acquisition unit acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam. The transmission control unit controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the transmission control unit. Further, when the feedback corresponding to any of the beam specific information is performed by the terminal device, the transmission control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. The transmission of the information addressed to the terminal device is controlled.
第1の実施形態では、上記複数の3次元ビームの各々に対応する上記ビーム固有情報は、上記複数の3次元ビームの各々に対応するRACHを示す情報(RACH情報)である。自らに対応する上記ビーム固有情報は、自らに対応するRACHを示す情報(RACH情報)である。いずれかのビーム固有情報に対応する上記フィードバックは、いずれかのRACHでのランダムアクセス手続きである。上記フィードバックに応じて決定される3次元ビームは、上記ランダムアクセス手続きが行われた上記RACHに基づき決定される3次元ビームである。
In the first embodiment, the beam specific information corresponding to each of the plurality of three-dimensional beams is information (RACH information) indicating the RACH corresponding to each of the plurality of three-dimensional beams. The beam specific information corresponding to itself is information (RACH information) indicating the RACH corresponding to itself. The feedback corresponding to any beam specific information is a random access procedure on any RACH. The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the RACH on which the random access procedure has been performed.
第2の実施形態では、上記複数の3次元ビームの各々に対応する上記ビーム固有情報は、上記複数の3次元ビームの各々を識別するためのビーム識別情報である。自らに対応する上記ビーム固有情報は、自らを識別するためのビーム識別情報である。いずれかのビーム固有情報に対応する上記フィードバックは、いずれかのビーム識別情報の通知である。上記フィードバックに応じて決定される3次元ビームは、通知される上記ビーム識別情報に基づき決定される3次元ビームである。
In the second embodiment, the beam specific information corresponding to each of the plurality of three-dimensional beams is beam identification information for identifying each of the plurality of three-dimensional beams. The beam specific information corresponding to itself is beam identification information for identifying itself. The feedback corresponding to any beam specific information is a notification of any beam identification information. The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the notified beam identification information.
なお、ビーム固有情報は、RACH情報及びビーム識別情報に限られない。様々な情報がビーム固有情報として使用され得る。
Note that the beam specific information is not limited to RACH information and beam identification information. Various information can be used as beam specific information.
-第2の共通の技術的特徴
例えば、上記複数の3次元ビームの各々に対応する上記ビーム固有情報は、システム情報の一部として送信される情報である。 Second common technical feature For example, the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information.
例えば、上記複数の3次元ビームの各々に対応する上記ビーム固有情報は、システム情報の一部として送信される情報である。 Second common technical feature For example, the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information.
第1の実施形態では、RACH情報は、システム情報の一部として送信される情報である。
In the first embodiment, RACH information is information transmitted as part of system information.
第2の実施形態では、ビーム識別情報は、システム情報の一部として送信される情報である。
In the second embodiment, the beam identification information is information transmitted as part of the system information.
-第3の共通の技術的特徴
例えば、送信制御部は、上記複数の3次元ビームの各々が、上記システム情報の上記一部として、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する。 -Third common technical feature For example, the transmission control unit may transmit the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information. The transmission of the beam specific information corresponding to each of the three-dimensional beams is controlled.
例えば、送信制御部は、上記複数の3次元ビームの各々が、上記システム情報の上記一部として、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する。 -Third common technical feature For example, the transmission control unit may transmit the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information. The transmission of the beam specific information corresponding to each of the three-dimensional beams is controlled.
第1の実施形態では、送信制御部153は、上記複数の3次元ビームの各々が、上記システム情報の上記一部として、自らに対応するRACHを示す情報(RACH情報)を搬送するように、上記複数の3次元ビームの各々に対応するRACHを示す上記RACH情報の送信を制御する。
In the first embodiment, the transmission control unit 153 carries the information indicating the RACH corresponding to itself (RACH information) as each of the plurality of three-dimensional beams as the part of the system information. The transmission of the RACH information indicating the RACH corresponding to each of the plurality of three-dimensional beams is controlled.
第2の実施形態では、送信制御部173は、上記複数の3次元ビームの各々が、上記システム情報の上記一部として、自らを識別するためのビーム識別情報を搬送するように、上記複数の3次元ビームの各々を識別するための上記ビーム識別情報の送信を制御する。
In the second embodiment, the transmission control unit 173 causes the plurality of three-dimensional beams to carry beam identification information for identifying themselves as the part of the system information. The transmission of the beam identification information for identifying each of the three-dimensional beams is controlled.
-第4の共通の技術的特徴
例えば、送信制御部は、上記複数の3次元ビームの各々が、上記システム情報の上記一部を含む情報の送信のために割り当てられる無線リソースを示す情報(スケジューリング情報)を搬送するように、上記スケジューリング情報の送信を制御する。 -Fourth common technical feature For example, the transmission control unit may include information (scheduling) indicating a radio resource to which each of the plurality of three-dimensional beams is allocated for transmission of information including the part of the system information. The transmission of the scheduling information is controlled so as to carry information.
例えば、送信制御部は、上記複数の3次元ビームの各々が、上記システム情報の上記一部を含む情報の送信のために割り当てられる無線リソースを示す情報(スケジューリング情報)を搬送するように、上記スケジューリング情報の送信を制御する。 -Fourth common technical feature For example, the transmission control unit may include information (scheduling) indicating a radio resource to which each of the plurality of three-dimensional beams is allocated for transmission of information including the part of the system information. The transmission of the scheduling information is controlled so as to carry information.
-第5の共通の技術的特徴
例えば、上記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームである。 -Fifth common technical feature For example, the plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors.
例えば、上記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームである。 -Fifth common technical feature For example, the plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors.
<<6.応用例>>
本開示に係る技術は、様々な製品へ応用可能である。例えば、基地局100は、マクロeNB、ピコeNB、又はホームeNBなどのいずれかの種類のeNB(evolved Node B)として実現されてもよい。その代わりに、基地局100は、NodeB又はBTS(Base Transceiver Station)などの他の種類の基地局として実現されてもよい。基地局100は、無線通信を制御する本体(基地局装置ともいう)と、本体とは別の場所に配置される1つ以上のRRH(Remote Radio Head)とを含んでもよい。 << 6. Application example >>
The technology according to the present disclosure can be applied to various products. For example, thebase station 100 may be realized as any type of eNB (evolved Node B) such as a macro eNB, a pico eNB, or a home eNB. Instead, the base station 100 may be realized as another type of base station such as a NodeB or a BTS (Base Transceiver Station). Base station 100 may include a main body (also referred to as a base station apparatus) that controls radio communication, and one or more RRHs (Remote Radio Heads) that are arranged at locations different from the main body.
本開示に係る技術は、様々な製品へ応用可能である。例えば、基地局100は、マクロeNB、ピコeNB、又はホームeNBなどのいずれかの種類のeNB(evolved Node B)として実現されてもよい。その代わりに、基地局100は、NodeB又はBTS(Base Transceiver Station)などの他の種類の基地局として実現されてもよい。基地局100は、無線通信を制御する本体(基地局装置ともいう)と、本体とは別の場所に配置される1つ以上のRRH(Remote Radio Head)とを含んでもよい。 << 6. Application example >>
The technology according to the present disclosure can be applied to various products. For example, the
また、例えば、端末装置200は、スマートフォン、タブレットPC(Personal Computer)、ノートPC、携帯型ゲーム端末、携帯型/ドングル型のモバイルルータ若しくはデジタルカメラなどのモバイル端末、又はカーナビゲーション装置などの車載端末として実現されてもよい。また、端末装置200は、M2M(Machine To Machine)通信を行う端末(MTC(Machine Type Communication)端末ともいう)として実現されてもよい。さらに、端末装置200は、これら端末に搭載される無線通信モジュール(例えば、1つのダイで構成される集積回路モジュール)であってもよい。
Further, for example, the terminal device 200 is a smartphone, a tablet PC (Personal Computer), a notebook PC, a portable game terminal, a mobile terminal such as a portable / dongle type mobile router or a digital camera, or an in-vehicle terminal such as a car navigation device. It may be realized as. The terminal device 200 may be realized as a terminal (also referred to as an MTC (Machine Type Communication) terminal) that performs M2M (Machine To Machine) communication. Further, the terminal device 200 may be a wireless communication module (for example, an integrated circuit module configured by one die) mounted on these terminals.
<6.1.基地局に関する応用例>
(第1の応用例)
図20は、本開示に係る技術が適用され得るeNBの概略的な構成の第1の例を示すブロック図である。eNB800は、1つ以上のアンテナ810、及び基地局装置820を有する。各アンテナ810及び基地局装置820は、RFケーブルを介して互いに接続され得る。 <6.1. Application examples for base stations>
(First application example)
FIG. 20 is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied. TheeNB 800 includes one or more antennas 810 and a base station device 820. Each antenna 810 and the base station apparatus 820 can be connected to each other via an RF cable.
(第1の応用例)
図20は、本開示に係る技術が適用され得るeNBの概略的な構成の第1の例を示すブロック図である。eNB800は、1つ以上のアンテナ810、及び基地局装置820を有する。各アンテナ810及び基地局装置820は、RFケーブルを介して互いに接続され得る。 <6.1. Application examples for base stations>
(First application example)
FIG. 20 is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied. The
アンテナ810の各々は、単一の又は複数のアンテナ素子(例えば、MIMOアンテナを構成する複数のアンテナ素子)を有し、基地局装置820による無線信号の送受信のために使用される。とりわけ本開示の実施形態では、少なくとも1つのアンテナ810は、3次元ビームを形成可能な指向性アンテナである。eNB800は、図20に示したように複数のアンテナ810を有し、複数のアンテナ810は、例えばeNB800が使用する複数の周波数帯域にそれぞれ対応してもよい。なお、図20にはeNB800が複数のアンテナ810を有する例を示したが、eNB800は単一のアンテナ810を有してもよい。
Each of the antennas 810 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission and reception of radio signals by the base station apparatus 820. In particular, in the embodiment of the present disclosure, at least one antenna 810 is a directional antenna capable of forming a three-dimensional beam. The eNB 800 includes a plurality of antennas 810 as illustrated in FIG. 20, and the plurality of antennas 810 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example. 20 illustrates an example in which the eNB 800 includes a plurality of antennas 810, but the eNB 800 may include a single antenna 810.
基地局装置820は、コントローラ821、メモリ822、ネットワークインタフェース823及び無線通信インタフェース825を備える。
The base station apparatus 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.
コントローラ821は、例えばCPU又はDSPであってよく、基地局装置820の上位レイヤの様々な機能を動作させる。例えば、コントローラ821は、無線通信インタフェース825により処理された信号内のデータからデータパケットを生成し、生成したパケットをネットワークインタフェース823を介して転送する。コントローラ821は、複数のベースバンドプロセッサからのデータをバンドリングすることによりバンドルドパケットを生成し、生成したバンドルドパケットを転送してもよい。また、コントローラ821は、無線リソース管理(Radio Resource Control)、無線ベアラ制御(Radio Bearer Control)、移動性管理(Mobility Management)、流入制御(Admission Control)又はスケジューリング(Scheduling)などの制御を実行する論理的な機能を有してもよい。また、当該制御は、周辺のeNB又はコアネットワークノードと連携して実行されてもよい。メモリ822は、RAM及びROMを含み、コントローラ821により実行されるプログラム、及び様々な制御データ(例えば、端末リスト、送信電力データ及びスケジューリングデータなど)を記憶する。
The controller 821 may be a CPU or a DSP, for example, and operates various functions of the upper layer of the base station apparatus 820. For example, the controller 821 generates a data packet from the data in the signal processed by the wireless communication interface 825, and transfers the generated packet via the network interface 823. The controller 821 may generate a bundled packet by bundling data from a plurality of baseband processors, and may transfer the generated bundled packet. In addition, the controller 821 is a logic that executes control such as radio resource control, radio bearer control, mobility management, inflow control, or scheduling. May have a typical function. Moreover, the said control may be performed in cooperation with a surrounding eNB or a core network node. The memory 822 includes RAM and ROM, and stores programs executed by the controller 821 and various control data (for example, terminal list, transmission power data, scheduling data, and the like).
ネットワークインタフェース823は、基地局装置820をコアネットワーク824に接続するための通信インタフェースである。コントローラ821は、ネットワークインタフェース823を介して、コアネットワークノード又は他のeNBと通信してもよい。その場合に、eNB800と、コアネットワークノード又は他のeNBとは、論理的なインタフェース(例えば、S1インタフェース又はX2インタフェース)により互いに接続されてもよい。ネットワークインタフェース823は、有線通信インタフェースであってもよく、又は無線バックホールのための無線通信インタフェースであってもよい。ネットワークインタフェース823が無線通信インタフェースである場合、ネットワークインタフェース823は、無線通信インタフェース825により使用される周波数帯域よりもより高い周波数帯域を無線通信に使用してもよい。
The network interface 823 is a communication interface for connecting the base station device 820 to the core network 824. The controller 821 may communicate with the core network node or other eNB via the network interface 823. In that case, the eNB 800 and the core network node or another eNB may be connected to each other by a logical interface (for example, an S1 interface or an X2 interface). The network interface 823 may be a wired communication interface or a wireless communication interface for wireless backhaul. When the network interface 823 is a wireless communication interface, the network interface 823 may use a frequency band higher than the frequency band used by the wireless communication interface 825 for wireless communication.
無線通信インタフェース825は、LTE(Long Term Evolution)又はLTE-Advancedなどのいずれかのセルラー通信方式をサポートし、アンテナ810を介して、eNB800のセル内に位置する端末に無線接続を提供する。無線通信インタフェース825は、典型的には、ベースバンド(BB)プロセッサ826及びRF回路827などを含み得る。BBプロセッサ826は、例えば、符号化/復号、変調/復調及び多重化/逆多重化などを行なってよく、各レイヤ(例えば、L1、MAC(Medium Access Control)、RLC(Radio Link Control)及びPDCP(Packet Data Convergence Protocol))の様々な信号処理を実行する。BBプロセッサ826は、コントローラ821の代わりに、上述した論理的な機能の一部又は全部を有してもよい。BBプロセッサ826は、通信制御プログラムを記憶するメモリ、当該プログラムを実行するプロセッサ及び関連する回路を含むモジュールであってもよく、BBプロセッサ826の機能は、上記プログラムのアップデートにより変更可能であってもよい。また、上記モジュールは、基地局装置820のスロットに挿入されるカード若しくはブレードであってもよく、又は上記カード若しくは上記ブレードに搭載されるチップであってもよい。一方、RF回路827は、ミキサ、フィルタ及びアンプなどを含んでもよく、アンテナ810を介して無線信号を送受信する。
The wireless communication interface 825 supports any cellular communication scheme such as LTE (Long Term Evolution) or LTE-Advanced, and provides a wireless connection to terminals located in the cell of the eNB 800 via the antenna 810. The wireless communication interface 825 may typically include a baseband (BB) processor 826, an RF circuit 827, and the like. The BB processor 826 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and each layer (for example, L1, MAC (Medium Access Control), RLC (Radio Link Control), and PDCP). Various signal processing of (Packet Data Convergence Protocol) is executed. The BB processor 826 may have some or all of the logical functions described above instead of the controller 821. The BB processor 826 may be a module that includes a memory that stores a communication control program, a processor that executes the program, and related circuits. The function of the BB processor 826 may be changed by updating the program. Good. Further, the module may be a card or a blade inserted into a slot of the base station apparatus 820, or a chip mounted on the card or the blade. On the other hand, the RF circuit 827 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 810.
無線通信インタフェース825は、図20に示したように複数のBBプロセッサ826を含み、複数のBBプロセッサ826は、例えばeNB800が使用する複数の周波数帯域にそれぞれ対応してもよい。また、無線通信インタフェース825は、図20に示したように複数のRF回路827を含み、複数のRF回路827は、例えば複数のアンテナ素子にそれぞれ対応してもよい。なお、図20には無線通信インタフェース825が複数のBBプロセッサ826及び複数のRF回路827を含む例を示したが、無線通信インタフェース825は単一のBBプロセッサ826又は単一のRF回路827を含んでもよい。
The radio communication interface 825 may include a plurality of BB processors 826 as illustrated in FIG. 20, and the plurality of BB processors 826 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example. Further, the wireless communication interface 825 includes a plurality of RF circuits 827 as shown in FIG. 20, and the plurality of RF circuits 827 may correspond to, for example, a plurality of antenna elements, respectively. 20 illustrates an example in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827. However, the wireless communication interface 825 includes a single BB processor 826 or a single RF circuit 827. But you can.
(第2の応用例)
図21は、本開示に係る技術が適用され得るeNBの概略的な構成の第2の例を示すブロック図である。eNB830は、1つ以上のアンテナ840、基地局装置850、及びRRH860を有する。各アンテナ840及びRRH860は、RFケーブルを介して互いに接続され得る。また、基地局装置850及びRRH860は、光ファイバケーブルなどの高速回線で互いに接続され得る。 (Second application example)
FIG. 21 is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied. TheeNB 830 includes one or more antennas 840, a base station apparatus 850, and an RRH 860. Each antenna 840 and RRH 860 may be connected to each other via an RF cable. Base station apparatus 850 and RRH 860 can be connected to each other via a high-speed line such as an optical fiber cable.
図21は、本開示に係る技術が適用され得るeNBの概略的な構成の第2の例を示すブロック図である。eNB830は、1つ以上のアンテナ840、基地局装置850、及びRRH860を有する。各アンテナ840及びRRH860は、RFケーブルを介して互いに接続され得る。また、基地局装置850及びRRH860は、光ファイバケーブルなどの高速回線で互いに接続され得る。 (Second application example)
FIG. 21 is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied. The
アンテナ840の各々は、単一の又は複数のアンテナ素子(例えば、MIMOアンテナを構成する複数のアンテナ素子)を有し、RRH860による無線信号の送受信のために使用される。とりわけ本開示の実施形態では、少なくとも1つのアンテナ840は、3次元ビームを形成可能な指向性アンテナである。eNB830は、図21に示したように複数のアンテナ840を有し、複数のアンテナ840は、例えばeNB830が使用する複数の周波数帯域にそれぞれ対応してもよい。なお、図21にはeNB830が複数のアンテナ840を有する例を示したが、eNB830は単一のアンテナ840を有してもよい。
Each of the antennas 840 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of radio signals by the RRH 860. In particular, in the embodiment of the present disclosure, the at least one antenna 840 is a directional antenna capable of forming a three-dimensional beam. The eNB 830 includes a plurality of antennas 840 as illustrated in FIG. 21, and the plurality of antennas 840 may respectively correspond to a plurality of frequency bands used by the eNB 830, for example. 21 illustrates an example in which the eNB 830 includes a plurality of antennas 840, but the eNB 830 may include a single antenna 840.
基地局装置850は、コントローラ851、メモリ852、ネットワークインタフェース853、無線通信インタフェース855及び接続インタフェース857を備える。コントローラ851、メモリ852及びネットワークインタフェース853は、図20を参照して説明したコントローラ821、メモリ822及びネットワークインタフェース823と同様のものである。
The base station device 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857. The controller 851, the memory 852, and the network interface 853 are the same as the controller 821, the memory 822, and the network interface 823 described with reference to FIG.
無線通信インタフェース855は、LTE又はLTE-Advancedなどのいずれかのセルラー通信方式をサポートし、RRH860及びアンテナ840を介して、RRH860に対応するセクタ内に位置する端末に無線接続を提供する。無線通信インタフェース855は、典型的には、BBプロセッサ856などを含み得る。BBプロセッサ856は、接続インタフェース857を介してRRH860のRF回路864と接続されることを除き、図20を参照して説明したBBプロセッサ826と同様のものである。無線通信インタフェース855は、図21に示したように複数のBBプロセッサ856を含み、複数のBBプロセッサ856は、例えばeNB830が使用する複数の周波数帯域にそれぞれ対応してもよい。なお、図21には無線通信インタフェース855が複数のBBプロセッサ856を含む例を示したが、無線通信インタフェース855は単一のBBプロセッサ856を含んでもよい。
The wireless communication interface 855 supports a cellular communication method such as LTE or LTE-Advanced, and provides a wireless connection to a terminal located in a sector corresponding to the RRH 860 via the RRH 860 and the antenna 840. The wireless communication interface 855 may typically include a BB processor 856 and the like. The BB processor 856 is the same as the BB processor 826 described with reference to FIG. 20 except that the BB processor 856 is connected to the RF circuit 864 of the RRH 860 via the connection interface 857. The wireless communication interface 855 includes a plurality of BB processors 856 as illustrated in FIG. 21, and the plurality of BB processors 856 may respectively correspond to a plurality of frequency bands used by the eNB 830, for example. 21 shows an example in which the wireless communication interface 855 includes a plurality of BB processors 856, the wireless communication interface 855 may include a single BB processor 856.
接続インタフェース857は、基地局装置850(無線通信インタフェース855)をRRH860と接続するためのインタフェースである。接続インタフェース857は、基地局装置850(無線通信インタフェース855)とRRH860とを接続する上記高速回線での通信のための通信モジュールであってもよい。
The connection interface 857 is an interface for connecting the base station device 850 (wireless communication interface 855) to the RRH 860. The connection interface 857 may be a communication module for communication on the high-speed line that connects the base station apparatus 850 (wireless communication interface 855) and the RRH 860.
また、RRH860は、接続インタフェース861及び無線通信インタフェース863を備える。
In addition, the RRH 860 includes a connection interface 861 and a wireless communication interface 863.
接続インタフェース861は、RRH860(無線通信インタフェース863)を基地局装置850と接続するためのインタフェースである。接続インタフェース861は、上記高速回線での通信のための通信モジュールであってもよい。
The connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station device 850. The connection interface 861 may be a communication module for communication on the high-speed line.
無線通信インタフェース863は、アンテナ840を介して無線信号を送受信する。無線通信インタフェース863は、典型的には、RF回路864などを含み得る。RF回路864は、ミキサ、フィルタ及びアンプなどを含んでもよく、アンテナ840を介して無線信号を送受信する。無線通信インタフェース863は、図21に示したように複数のRF回路864を含み、複数のRF回路864は、例えば複数のアンテナ素子にそれぞれ対応してもよい。なお、図21には無線通信インタフェース863が複数のRF回路864を含む例を示したが、無線通信インタフェース863は単一のRF回路864を含んでもよい。
The wireless communication interface 863 transmits and receives wireless signals via the antenna 840. The wireless communication interface 863 may typically include an RF circuit 864 and the like. The RF circuit 864 may include a mixer, a filter, an amplifier, and the like, and transmits and receives wireless signals via the antenna 840. The wireless communication interface 863 includes a plurality of RF circuits 864 as shown in FIG. 21, and the plurality of RF circuits 864 may correspond to, for example, a plurality of antenna elements, respectively. 21 shows an example in which the wireless communication interface 863 includes a plurality of RF circuits 864, the wireless communication interface 863 may include a single RF circuit 864.
図20及び図21に示したeNB800及びeNB830において、図9及び図15を参照して説明した情報取得部151、171及び送信制御部153、173は、無線通信インタフェース825並びに無線通信インタフェース855及び/又は無線通信インタフェース863において実装されてもよい。また、これら機能の少なくとも一部は、コントローラ821及びコントローラ851において実装されてもよい。
In the eNB 800 and the eNB 830 illustrated in FIGS. 20 and 21, the information acquisition units 151 and 171 and the transmission control units 153 and 173 described with reference to FIGS. 9 and 15 are the wireless communication interface 825 and the wireless communication interface 855 and / or Alternatively, the wireless communication interface 863 may be implemented. Further, at least a part of these functions may be implemented in the controller 821 and the controller 851.
<6.2.端末装置に関する応用例>
(第1の応用例)
図22は、本開示に係る技術が適用され得るスマートフォン900の概略的な構成の一例を示すブロック図である。スマートフォン900は、プロセッサ901、メモリ902、ストレージ903、外部接続インタフェース904、カメラ906、センサ907、マイクロフォン908、入力デバイス909、表示デバイス910、スピーカ911、無線通信インタフェース912、1つ以上のアンテナスイッチ915、1つ以上のアンテナ916、バス917、バッテリー918及び補助コントローラ919を備える。 <6.2. Application examples related to terminal devices>
(First application example)
FIG. 22 is a block diagram illustrating an example of a schematic configuration of asmartphone 900 to which the technology according to the present disclosure can be applied. The smartphone 900 includes a processor 901, a memory 902, a storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915. One or more antennas 916, a bus 917, a battery 918 and an auxiliary controller 919 are provided.
(第1の応用例)
図22は、本開示に係る技術が適用され得るスマートフォン900の概略的な構成の一例を示すブロック図である。スマートフォン900は、プロセッサ901、メモリ902、ストレージ903、外部接続インタフェース904、カメラ906、センサ907、マイクロフォン908、入力デバイス909、表示デバイス910、スピーカ911、無線通信インタフェース912、1つ以上のアンテナスイッチ915、1つ以上のアンテナ916、バス917、バッテリー918及び補助コントローラ919を備える。 <6.2. Application examples related to terminal devices>
(First application example)
FIG. 22 is a block diagram illustrating an example of a schematic configuration of a
プロセッサ901は、例えばCPU又はSoC(System on Chip)であってよく、スマートフォン900のアプリケーションレイヤ及びその他のレイヤの機能を制御する。メモリ902は、RAM及びROMを含み、プロセッサ901により実行されるプログラム及びデータを記憶する。ストレージ903は、半導体メモリ又はハードディスクなどの記憶媒体を含み得る。外部接続インタフェース904は、メモリーカード又はUSB(Universal Serial Bus)デバイスなどの外付けデバイスをスマートフォン900へ接続するためのインタフェースである。
The processor 901 may be, for example, a CPU or a SoC (System on Chip), and controls the functions of the application layer and other layers of the smartphone 900. The memory 902 includes a RAM and a ROM, and stores programs executed by the processor 901 and data. The storage 903 can include a storage medium such as a semiconductor memory or a hard disk. The external connection interface 904 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device to the smartphone 900.
カメラ906は、例えば、CCD(Charge Coupled Device)又はCMOS(Complementary Metal Oxide Semiconductor)などの撮像素子を有し、撮像画像を生成する。センサ907は、例えば、測位センサ、ジャイロセンサ、地磁気センサ及び加速度センサなどのセンサ群を含み得る。マイクロフォン908は、スマートフォン900へ入力される音声を音声信号へ変換する。入力デバイス909は、例えば、表示デバイス910の画面上へのタッチを検出するタッチセンサ、キーパッド、キーボード、ボタン又はスイッチなどを含み、ユーザからの操作又は情報入力を受け付ける。表示デバイス910は、液晶ディスプレイ(LCD)又は有機発光ダイオード(OLED)ディスプレイなどの画面を有し、スマートフォン900の出力画像を表示する。スピーカ911は、スマートフォン900から出力される音声信号を音声に変換する。
The camera 906 includes, for example, an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and generates a captured image. The sensor 907 may include a sensor group such as a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 908 converts sound input to the smartphone 900 into an audio signal. The input device 909 includes, for example, a touch sensor that detects a touch on the screen of the display device 910, a keypad, a keyboard, a button, or a switch, and receives an operation or information input from a user. The display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smartphone 900. The speaker 911 converts an audio signal output from the smartphone 900 into audio.
無線通信インタフェース912は、LTE又はLTE-Advancedなどのいずれかのセルラー通信方式をサポートし、無線通信を実行する。無線通信インタフェース912は、典型的には、BBプロセッサ913及びRF回路914などを含み得る。BBプロセッサ913は、例えば、符号化/復号、変調/復調及び多重化/逆多重化などを行なってよく、無線通信のための様々な信号処理を実行する。一方、RF回路914は、ミキサ、フィルタ及びアンプなどを含んでもよく、アンテナ916を介して無線信号を送受信する。無線通信インタフェース912は、BBプロセッサ913及びRF回路914を集積したワンチップのモジュールであってもよい。無線通信インタフェース912は、図22に示したように複数のBBプロセッサ913及び複数のRF回路914を含んでもよい。なお、図22には無線通信インタフェース912が複数のBBプロセッサ913及び複数のRF回路914を含む例を示したが、無線通信インタフェース912は単一のBBプロセッサ913又は単一のRF回路914を含んでもよい。
The wireless communication interface 912 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication. The wireless communication interface 912 may typically include a BB processor 913, an RF circuit 914, and the like. The BB processor 913 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication. On the other hand, the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 916. The wireless communication interface 912 may be a one-chip module in which the BB processor 913 and the RF circuit 914 are integrated. The wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914 as illustrated in FIG. 22 shows an example in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914, the wireless communication interface 912 includes a single BB processor 913 or a single RF circuit 914. But you can.
さらに、無線通信インタフェース912は、セルラー通信方式に加えて、近距離無線通信方式、近接無線通信方式又は無線LAN(Local Area Network)方式などの他の種類の無線通信方式をサポートしてもよく、その場合に、無線通信方式ごとのBBプロセッサ913及びRF回路914を含んでもよい。
Furthermore, the wireless communication interface 912 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN (Local Area Network) method in addition to the cellular communication method. In that case, a BB processor 913 and an RF circuit 914 for each wireless communication method may be included.
アンテナスイッチ915の各々は、無線通信インタフェース912に含まれる複数の回路(例えば、異なる無線通信方式のための回路)の間でアンテナ916の接続先を切り替える。
Each of the antenna switches 915 switches the connection destination of the antenna 916 among a plurality of circuits (for example, circuits for different wireless communication systems) included in the wireless communication interface 912.
アンテナ916の各々は、単一の又は複数のアンテナ素子(例えば、MIMOアンテナを構成する複数のアンテナ素子)を有し、無線通信インタフェース912による無線信号の送受信のために使用される。スマートフォン900は、図22に示したように複数のアンテナ916を有してもよい。なお、図22にはスマートフォン900が複数のアンテナ916を有する例を示したが、スマートフォン900は単一のアンテナ916を有してもよい。
Each of the antennas 916 includes a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 912. The smartphone 900 may include a plurality of antennas 916 as illustrated in FIG. 22 illustrates an example in which the smartphone 900 includes a plurality of antennas 916, the smartphone 900 may include a single antenna 916.
さらに、スマートフォン900は、無線通信方式ごとにアンテナ916を備えてもよい。その場合に、アンテナスイッチ915は、スマートフォン900の構成から省略されてもよい。
Furthermore, the smartphone 900 may include an antenna 916 for each wireless communication method. In that case, the antenna switch 915 may be omitted from the configuration of the smartphone 900.
バス917は、プロセッサ901、メモリ902、ストレージ903、外部接続インタフェース904、カメラ906、センサ907、マイクロフォン908、入力デバイス909、表示デバイス910、スピーカ911、無線通信インタフェース912及び補助コントローラ919を互いに接続する。バッテリー918は、図中に破線で部分的に示した給電ラインを介して、図22に示したスマートフォン900の各ブロックへ電力を供給する。補助コントローラ919は、例えば、スリープモードにおいて、スマートフォン900の必要最低限の機能を動作させる。
The bus 917 connects the processor 901, the memory 902, the storage 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 to each other. . The battery 918 supplies power to each block of the smartphone 900 illustrated in FIG. 22 through a power supply line partially illustrated by a broken line in the drawing. For example, the auxiliary controller 919 operates the minimum necessary functions of the smartphone 900 in the sleep mode.
図22に示したスマートフォン900において、図16を参照して説明した情報取得部261及び通知部263は、無線通信インタフェース912において実装されてもよい。また、これら機能の少なくとも一部は、プロセッサ901又は補助コントローラ919において実装されてもよい。
22, the information acquisition unit 261 and the notification unit 263 described with reference to FIG. 16 may be implemented in the wireless communication interface 912. In addition, at least a part of these functions may be implemented in the processor 901 or the auxiliary controller 919.
(第2の応用例)
図23は、本開示に係る技術が適用され得るカーナビゲーション装置920の概略的な構成の一例を示すブロック図である。カーナビゲーション装置920は、プロセッサ921、メモリ922、GPS(Global Positioning System)モジュール924、センサ925、データインタフェース926、コンテンツプレーヤ927、記憶媒体インタフェース928、入力デバイス929、表示デバイス930、スピーカ931、無線通信インタフェース933、1つ以上のアンテナスイッチ936、1つ以上のアンテナ937及びバッテリー938を備える。 (Second application example)
FIG. 23 is a block diagram illustrating an example of a schematic configuration of acar navigation device 920 to which the technology according to the present disclosure can be applied. The car navigation device 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, and wireless communication. The interface 933 includes one or more antenna switches 936, one or more antennas 937, and a battery 938.
図23は、本開示に係る技術が適用され得るカーナビゲーション装置920の概略的な構成の一例を示すブロック図である。カーナビゲーション装置920は、プロセッサ921、メモリ922、GPS(Global Positioning System)モジュール924、センサ925、データインタフェース926、コンテンツプレーヤ927、記憶媒体インタフェース928、入力デバイス929、表示デバイス930、スピーカ931、無線通信インタフェース933、1つ以上のアンテナスイッチ936、1つ以上のアンテナ937及びバッテリー938を備える。 (Second application example)
FIG. 23 is a block diagram illustrating an example of a schematic configuration of a
プロセッサ921は、例えばCPU又はSoCであってよく、カーナビゲーション装置920のナビゲーション機能及びその他の機能を制御する。メモリ922は、RAM及びROMを含み、プロセッサ921により実行されるプログラム及びデータを記憶する。
The processor 921 may be a CPU or SoC, for example, and controls the navigation function and other functions of the car navigation device 920. The memory 922 includes RAM and ROM, and stores programs and data executed by the processor 921.
GPSモジュール924は、GPS衛星から受信されるGPS信号を用いて、カーナビゲーション装置920の位置(例えば、緯度、経度及び高度)を測定する。センサ925は、例えば、ジャイロセンサ、地磁気センサ及び気圧センサなどのセンサ群を含み得る。データインタフェース926は、例えば、図示しない端子を介して車載ネットワーク941に接続され、車速データなどの車両側で生成されるデータを取得する。
The GPS module 924 measures the position (for example, latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites. The sensor 925 may include a sensor group such as a gyro sensor, a geomagnetic sensor, and an atmospheric pressure sensor. The data interface 926 is connected to the in-vehicle network 941 through a terminal (not shown), for example, and acquires data generated on the vehicle side such as vehicle speed data.
コンテンツプレーヤ927は、記憶媒体インタフェース928に挿入される記憶媒体(例えば、CD又はDVD)に記憶されているコンテンツを再生する。入力デバイス929は、例えば、表示デバイス930の画面上へのタッチを検出するタッチセンサ、ボタン又はスイッチなどを含み、ユーザからの操作又は情報入力を受け付ける。表示デバイス930は、LCD又はOLEDディスプレイなどの画面を有し、ナビゲーション機能又は再生されるコンテンツの画像を表示する。スピーカ931は、ナビゲーション機能又は再生されるコンテンツの音声を出力する。
The content player 927 reproduces content stored in a storage medium (for example, CD or DVD) inserted into the storage medium interface 928. The input device 929 includes, for example, a touch sensor, a button, or a switch that detects a touch on the screen of the display device 930, and receives an operation or information input from the user. The display device 930 has a screen such as an LCD or an OLED display, and displays a navigation function or an image of content to be reproduced. The speaker 931 outputs the navigation function or the audio of the content to be played back.
無線通信インタフェース933は、LTE又はLTE-Advancedなどのいずれかのセルラー通信方式をサポートし、無線通信を実行する。無線通信インタフェース933は、典型的には、BBプロセッサ934及びRF回路935などを含み得る。BBプロセッサ934は、例えば、符号化/復号、変調/復調及び多重化/逆多重化などを行なってよく、無線通信のための様々な信号処理を実行する。一方、RF回路935は、ミキサ、フィルタ及びアンプなどを含んでもよく、アンテナ937を介して無線信号を送受信する。無線通信インタフェース933は、BBプロセッサ934及びRF回路935を集積したワンチップのモジュールであってもよい。無線通信インタフェース933は、図23に示したように複数のBBプロセッサ934及び複数のRF回路935を含んでもよい。なお、図23には無線通信インタフェース933が複数のBBプロセッサ934及び複数のRF回路935を含む例を示したが、無線通信インタフェース933は単一のBBプロセッサ934又は単一のRF回路935を含んでもよい。
The wireless communication interface 933 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication. The wireless communication interface 933 may typically include a BB processor 934, an RF circuit 935, and the like. The BB processor 934 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication. On the other hand, the RF circuit 935 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 937. The wireless communication interface 933 may be a one-chip module in which the BB processor 934 and the RF circuit 935 are integrated. The wireless communication interface 933 may include a plurality of BB processors 934 and a plurality of RF circuits 935 as shown in FIG. FIG. 23 shows an example in which the wireless communication interface 933 includes a plurality of BB processors 934 and a plurality of RF circuits 935. However, the wireless communication interface 933 includes a single BB processor 934 or a single RF circuit 935. But you can.
さらに、無線通信インタフェース933は、セルラー通信方式に加えて、近距離無線通信方式、近接無線通信方式又は無線LAN方式などの他の種類の無線通信方式をサポートしてもよく、その場合に、無線通信方式ごとのBBプロセッサ934及びRF回路935を含んでもよい。
Further, the wireless communication interface 933 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN method in addition to the cellular communication method. A BB processor 934 and an RF circuit 935 may be included for each communication method.
アンテナスイッチ936の各々は、無線通信インタフェース933に含まれる複数の回路(例えば、異なる無線通信方式のための回路)の間でアンテナ937の接続先を切り替える。
Each of the antenna switches 936 switches the connection destination of the antenna 937 among a plurality of circuits included in the wireless communication interface 933 (for example, circuits for different wireless communication systems).
アンテナ937の各々は、単一の又は複数のアンテナ素子(例えば、MIMOアンテナを構成する複数のアンテナ素子)を有し、無線通信インタフェース933による無線信号の送受信のために使用される。カーナビゲーション装置920は、図23に示したように複数のアンテナ937を有してもよい。なお、図23にはカーナビゲーション装置920が複数のアンテナ937を有する例を示したが、カーナビゲーション装置920は単一のアンテナ937を有してもよい。
Each of the antennas 937 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 933. The car navigation device 920 may include a plurality of antennas 937 as shown in FIG. FIG. 23 illustrates an example in which the car navigation device 920 includes a plurality of antennas 937. However, the car navigation device 920 may include a single antenna 937.
さらに、カーナビゲーション装置920は、無線通信方式ごとにアンテナ937を備えてもよい。その場合に、アンテナスイッチ936は、カーナビゲーション装置920の構成から省略されてもよい。
Furthermore, the car navigation device 920 may include an antenna 937 for each wireless communication method. In that case, the antenna switch 936 may be omitted from the configuration of the car navigation device 920.
バッテリー938は、図中に破線で部分的に示した給電ラインを介して、図23に示したカーナビゲーション装置920の各ブロックへ電力を供給する。また、バッテリー938は、車両側から給電される電力を蓄積する。
The battery 938 supplies power to each block of the car navigation device 920 shown in FIG. 23 through a power supply line partially shown by broken lines in the drawing. Further, the battery 938 stores electric power supplied from the vehicle side.
図23に示したカーナビゲーション装置920において、図16を参照して説明した情報取得部261及び通知部263は、無線通信インタフェース933において実装されてもよい。また、これら機能の少なくとも一部は、プロセッサ921において実装されてもよい。
In the car navigation device 920 shown in FIG. 23, the information acquisition unit 261 and the notification unit 263 described with reference to FIG. 16 may be implemented in the wireless communication interface 933. Further, at least a part of these functions may be implemented in the processor 921.
また、本開示に係る技術は、上述したカーナビゲーション装置920の1つ以上のブロックと、車載ネットワーク941と、車両側モジュール942とを含む車載システム(又は車両)940として実現されてもよい。車両側モジュール942は、車速、エンジン回転数又は故障情報などの車両側データを生成し、生成したデータを車載ネットワーク941へ出力する。
Also, the technology according to the present disclosure may be realized as an in-vehicle system (or vehicle) 940 including one or more blocks of the car navigation device 920 described above, an in-vehicle network 941, and a vehicle side module 942. The vehicle-side module 942 generates vehicle-side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the in-vehicle network 941.
<<7.まとめ>>
ここまで、図6~図23を参照して、本開示の実施形態に係る各装置及び各処理を説明した。本開示に係る実施形態によれば、情報取得部は、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する。送信制御部は、上記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する。さらに、送信制御部は、いずれかのビーム固有情報に対応するフィードバックが上記端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、上記端末装置宛の情報を搬送するように、上記端末装置宛の上記情報の送信を制御する。 << 7. Summary >>
So far, each device and each process according to the embodiment of the present disclosure have been described with reference to FIGS. According to the embodiment according to the present disclosure, the information acquisition unit acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam. The transmission control unit controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the transmission control unit. Further, when the feedback corresponding to any of the beam specific information is performed by the terminal device, the transmission control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. The transmission of the information addressed to the terminal device is controlled.
ここまで、図6~図23を参照して、本開示の実施形態に係る各装置及び各処理を説明した。本開示に係る実施形態によれば、情報取得部は、3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する。送信制御部は、上記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する。さらに、送信制御部は、いずれかのビーム固有情報に対応するフィードバックが上記端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、上記端末装置宛の情報を搬送するように、上記端末装置宛の上記情報の送信を制御する。 << 7. Summary >>
So far, each device and each process according to the embodiment of the present disclosure have been described with reference to FIGS. According to the embodiment according to the present disclosure, the information acquisition unit acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam. The transmission control unit controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the transmission control unit. Further, when the feedback corresponding to any of the beam specific information is performed by the terminal device, the transmission control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. The transmission of the information addressed to the terminal device is controlled.
これにより、ビームフォーミングに関連する負荷を軽減することが可能になる。一例として、基地局100及び端末装置200は重み係数のセットを算出する必要はないので、基地局100が有するアンテナ素子の数が増加したとしても、端末装置200及び基地局100の処理の観点での負荷は増加しない。また、別の例として、コードブックインデックスの通知によるオーバーヘッドが減少し、無線リソースの観点での負荷が減少する。また、さらに別の例として、基地局100が有するアンテナ素子の数が増加したとしても、リファレンス信号の数を増やさなくてもよいので、オーバーヘッドが減少し、無線リソースの観点での負荷が減少する。例えばこのように、処理又は無線リソースなどの観点から、ビームフォーミングに関連する負荷が軽減され得る。
This makes it possible to reduce the load related to beam forming. As an example, since the base station 100 and the terminal device 200 do not need to calculate a set of weighting factors, even if the number of antenna elements included in the base station 100 increases, from the viewpoint of processing of the terminal device 200 and the base station 100 The load does not increase. As another example, the overhead due to the notification of the codebook index is reduced, and the load in terms of radio resources is reduced. As yet another example, even if the number of antenna elements included in the base station 100 increases, the number of reference signals does not need to be increased, thereby reducing overhead and reducing the load in terms of radio resources. . For example, in this way, the load related to beamforming can be reduced from the viewpoint of processing or radio resources.
さらに、例えば、上記複数の3次元ビームの各々に対応する上記ビーム固有情報は、システム情報の一部として送信される情報である。
Further, for example, the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of the system information.
これにより、例えば、接続状態ではない端末装置200(例えば、アイドル状態である端末装置200)にもビーム固有情報を知らせることが可能になる。また、例えば、ビーム識別情報を、個別の端末装置200へ通知するのではなく、不特定の端末装置200へ報知することが可能になる。
Thereby, for example, it becomes possible to notify the beam unique information to the terminal device 200 that is not in the connected state (for example, the terminal device 200 that is in the idle state). Further, for example, the beam identification information can be notified to an unspecified terminal device 200 instead of being notified to the individual terminal device 200.
さらに、例えば、送信制御部は、上記複数の3次元ビームの各々が、上記システム情報の上記一部として、自らに対応するビーム固有情報を搬送するように、上記複数の3次元ビームの各々に対応する上記ビーム固有情報の送信を制御する。
Further, for example, the transmission control unit may transmit each of the plurality of three-dimensional beams to each of the plurality of three-dimensional beams such that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information. The transmission of the corresponding beam specific information is controlled.
これにより、端末装置200は、システム情報から、端末装置200-2に届く3次元ビーム20に対応するビーム固有情報を取得することが可能になる。例えば、図8を参照すると、端末装置200Aは、システム情報から、3次元ビーム20Aに対応する第1のビーム固有情報を取得する。一方、端末装置200Bは、システム情報から、3次元ビーム20Bに対応する第2のビーム固有情報を取得する。
Thereby, the terminal device 200 can acquire the beam specific information corresponding to the three-dimensional beam 20 reaching the terminal device 200-2 from the system information. For example, referring to FIG. 8, the terminal device 200A acquires the first beam specific information corresponding to the three-dimensional beam 20A from the system information. On the other hand, the terminal device 200B acquires the second beam specific information corresponding to the three-dimensional beam 20B from the system information.
さらに、例えば、送信制御部は、上記複数の3次元ビームの各々が、上記システム情報の上記一部を含む情報の送信のために割り当てられる無線リソースを示す情報(スケジューリング情報)を搬送するように、上記スケジューリング情報の送信を制御する。
Further, for example, the transmission control unit may carry information (scheduling information) indicating a radio resource allocated to each of the plurality of three-dimensional beams for transmission of information including the part of the system information. The transmission of the scheduling information is controlled.
これにより、例えば、端末装置200は、ビーム固有情報をより確実に取得することが可能になる。具体的には、例えば、端末装置200は、セルエッジに位置し、3次元ビームによって送信されるビーム固有情報を受信可能であるが、当該ビーム固有情報のスケジューリング情報が受信不能である場合には、結果として、ビーム固有情報を取得することができない。しかし、ビーム固有情報のスケジューリング情報も3次元ビームによって送信されれば、端末装置200は、当該スケジューリング情報をより確実に取得することができ、結果としてビーム固有情報をより確実に取得することができる。
Thereby, for example, the terminal device 200 can more reliably acquire the beam specific information. Specifically, for example, the terminal device 200 is located at a cell edge and can receive beam specific information transmitted by a three-dimensional beam, but when scheduling information of the beam specific information cannot be received, As a result, beam specific information cannot be acquired. However, if the scheduling information of the beam specific information is also transmitted by the three-dimensional beam, the terminal device 200 can acquire the scheduling information more reliably, and as a result, can acquire the beam specific information more reliably. .
以上、添付図面を参照しながら本開示の好適な実施形態を説明したが、本開示は係る例に限定されないことは言うまでもない。当業者であれば、請求の範囲に記載された範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、それらについても当然に本開示の技術的範囲に属するものと了解される。
As mentioned above, although preferred embodiment of this indication was described referring an accompanying drawing, it cannot be overemphasized that this indication is not limited to the example concerned. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are of course within the technical scope of the present disclosure. Is done.
例えば、基地局が3次元ビームにより各端末装置に情報を送信することを説明したが、本開示は係る例に限定されない。例えば、基地局は、一部の端末装置に3次元ビームにより情報を送信してもよい。一例として、基地局は、セルの中心部に位置する端末装置には3次元ビームにより情報を送信せず、セルの周辺部に位置する端末装置に3次元ビームにより情報を送信してもよい。また、基地局は、高い位置(例えば、高層階のビル)に位置する端末装置に3次元ビームにより情報を送信してもよい。
For example, although it has been described that the base station transmits information to each terminal apparatus using a three-dimensional beam, the present disclosure is not limited to such an example. For example, the base station may transmit information to a part of terminal devices using a three-dimensional beam. As an example, the base station may transmit information using a three-dimensional beam to a terminal device located in the periphery of the cell without transmitting information to the terminal device located in the center of the cell using a three-dimensional beam. Further, the base station may transmit information using a three-dimensional beam to a terminal device located at a high position (for example, a building on a higher floor).
また、本明細書の通信制御処理における処理ステップは、必ずしもフローチャートに記載された順序に沿って時系列に実行されなくてよい。例えば、通信制御処理における処理ステップは、フローチャートとして記載した順序と異なる順序で実行されても、並列的に実行されてもよい。
Also, the processing steps in the communication control processing of this specification do not necessarily have to be executed in time series in the order described in the flowchart. For example, the processing steps in the communication control process may be executed in an order different from the order described in the flowchart, or may be executed in parallel.
また、通信制御装置(基地局の制御装置)及び端末装置に内蔵されるCPU、ROM及びRAM等のハードウェアに、上記通信制御装置及び上記端末装置の各構成と同等の機能を発揮させるためのコンピュータプログラムも作成可能である。また、当該コンピュータプログラムを記憶させた記憶媒体も提供されてもよい。また、当該コンピュータプログラムを記憶するメモリ(例えば、ROM及びRAM)と、当該コンピュータプログラムを実行するプロセッサ(例えば、CPU)を含む情報処理装置(例えば、処理回路、チップ)も提供されてもよい。
In addition, hardware such as a CPU, ROM, and RAM incorporated in a communication control device (base station control device) and a terminal device can be used to exhibit functions equivalent to the configurations of the communication control device and the terminal device. Computer programs can also be created. A storage medium storing the computer program may also be provided. An information processing apparatus (for example, a processing circuit or a chip) including a memory (for example, ROM and RAM) for storing the computer program and a processor (for example, CPU) for executing the computer program may be provided.
また、本明細書に記載された効果は、あくまで説明的又は例示的なものであって限定的ではない。つまり、本開示に係る技術は、上記効果とともに、又は上記効果に代えて、本明細書の記載から当業者には明らかな他の効果を奏しうる。
In addition, the effects described in the present specification are merely illustrative or illustrative, and are not limited. That is, the technology according to the present disclosure can exhibit other effects that are apparent to those skilled in the art from the description of the present specification in addition to or instead of the above effects.
なお、以下のような構成も本開示の技術的範囲に属する。
(1)
3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する取得部と、
前記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御する制御部と、
を備え、
前記制御部は、いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、前記端末装置宛の情報を搬送するように、前記端末装置宛の前記情報の送信を制御する、
通信制御装置。
(2)
前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、システム情報の一部として送信される情報である、前記(1)に記載の通信制御装置。
(3)
前記制御部は、前記複数の3次元ビームの各々が、前記システム情報の前記一部として、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御する、前記(2)に記載の通信制御装置。
(4)
前記制御部は、前記複数の3次元ビームの各々が、前記システム情報の前記一部を含む情報の送信のために割り当てられる無線リソースを示す情報を搬送するように、前記無線リソースを示す前記情報の送信を制御する、前記(2)又は(3)に記載の通信制御装置。
(5)
前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームである、前記(1)~(4)のいずれか1項に記載の通信制御装置。
(6)
前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、前記複数の3次元ビームの各々に対応するランダムアクセスチャネルを示す情報であり、
自らに対応する前記ビーム固有情報は、自らに対応するランダムアクセスチャネルを示す情報であり、
いずれかのビーム固有情報に対応する前記フィードバックは、いずれかのランダムアクセスチャネルでのランダムアクセス手続きであり、
前記フィードバックに応じて決定される3次元ビームは、前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに基づき決定される3次元ビームである、
前記(1)~(5)のいずれか1項に記載の通信制御装置。
(7)
前記複数の3次元ビームの各々に対応するランダムアクセスチャネルは、前記複数の3次元ビームの他の3次元ビームに対応するランダムアクセスチャネルと異なる、前記(6)に記載の通信制御装置。
(8)
前記複数の3次元ビームの各々に対応するランダムアクセスチャネルを示す前記情報は、システム情報の一部として送信される情報であり、
前記システム情報の前記一部は、物理ランダムアクセスチャネルコンフィギュレーションインデックス及び物理ランダムアクセスチャネル周波数オフセットを含む、前記(6)又は(7)に記載の通信制御装置。
(9)
前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームであり、
前記複数の3次元ビームの各々に対応するランダムアクセスチャネルは、前記複数の3次元ビームの各々を形成するための重み係数のセットに対応するランダムアクセスチャネルである、
前記(6)~(8)のいずれか1項に記載の通信制御装置。
(10)
前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに基づき決定される3次元ビームは、前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに対応する3次元ビーム、又は当該ランダムアクセスチャネルに対応する当該3次元ビームに基づき決定される3次元ビームである、前記(6)~(9)のいずれか1項に記載の通信制御装置。
(11)
前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、前記複数の3次元ビームの各々を識別するためのビーム識別情報であり、
自らに対応する前記ビーム固有情報は、自らを識別するためのビーム識別情報であり、
いずれかのビーム固有情報に対応する前記フィードバックは、いずれかのビーム識別情報の通知であり、
前記フィードバックに応じて決定される3次元ビームは、通知される前記ビーム識別情報に基づき決定される3次元ビームである、
前記(1)~(5)のいずれか1項に記載の通信制御装置。
(12)
前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームであり、
前記複数の3次元ビームの各々を識別するための前記ビーム識別情報は、前記複数の3次元ビームの各々を形成するための重み係数のセットを識別するための情報である、
前記(11)に記載の通信制御装置。
(13)
通知される前記ビーム識別情報に基づき決定される前記3次元ビームは、通知される前記ビーム識別情報から識別される3次元ビーム、又は通知される当該ビーム識別情報から識別される当該3次元ビームに基づき決定される3次元ビームである、前記(11)又は(12)に記載の通信制御装置。
(14)
3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得することと、
前記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御することと、
いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、前記端末装置宛の情報を搬送するように、前記端末装置宛の前記情報の送信を制御することと、
を含む通信制御方法。
(15)
端末装置であって、
3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する場合に、前記複数の3次元ビームのうちのいずれかの3次元ビームを識別するためのビーム識別情報を取得する取得部と、
取得される前記ビーム識別情報を通知する通知部と、
を備え、
通知される前記ビーム識別情報は、前記端末装置宛の情報を搬送する3次元ビームを決定するために用いられる情報である、
端末装置。 The following configurations also belong to the technical scope of the present disclosure.
(1)
An acquisition unit that acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam;
A control unit that controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the plurality of three-dimensional beams;
With
When the feedback corresponding to any of the beam specific information is performed by the terminal device, the control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Control the transmission of the information addressed to the device;
Communication control device.
(2)
The communication control apparatus according to (1), wherein the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information.
(3)
The control unit includes the beam corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information. The communication control device according to (2), which controls transmission of unique information.
(4)
The control unit includes the information indicating the radio resource such that each of the plurality of three-dimensional beams carries information indicating a radio resource allocated for transmission of information including the part of the system information. The communication control device according to (2) or (3), wherein the transmission control is performed.
(5)
The communication control device according to any one of (1) to (4), wherein the plurality of three-dimensional beams are three-dimensional beams formed by sets having different weighting factors.
(6)
The beam specific information corresponding to each of the plurality of three-dimensional beams is information indicating a random access channel corresponding to each of the plurality of three-dimensional beams,
The beam specific information corresponding to itself is information indicating a random access channel corresponding to itself,
The feedback corresponding to any beam specific information is a random access procedure on any random access channel;
The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the random access channel on which the random access procedure has been performed.
The communication control apparatus according to any one of (1) to (5).
(7)
The communication control device according to (6), wherein a random access channel corresponding to each of the plurality of three-dimensional beams is different from a random access channel corresponding to another three-dimensional beam of the plurality of three-dimensional beams.
(8)
The information indicating a random access channel corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information;
The communication control apparatus according to (6) or (7), wherein the part of the system information includes a physical random access channel configuration index and a physical random access channel frequency offset.
(9)
The plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors;
The random access channel corresponding to each of the plurality of three-dimensional beams is a random access channel corresponding to a set of weighting factors for forming each of the plurality of three-dimensional beams.
The communication control apparatus according to any one of (6) to (8).
(10)
The three-dimensional beam determined based on the random access channel on which the random access procedure has been performed is a three-dimensional beam corresponding to the random access channel on which the random access procedure has been performed, or the corresponding to the random access channel. The communication control device according to any one of (6) to (9), wherein the communication control device is a three-dimensional beam determined based on the three-dimensional beam.
(11)
The beam specific information corresponding to each of the plurality of three-dimensional beams is beam identification information for identifying each of the plurality of three-dimensional beams,
The beam specific information corresponding to itself is beam identification information for identifying itself,
The feedback corresponding to any beam specific information is a notification of any beam identification information;
The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the notified beam identification information.
The communication control apparatus according to any one of (1) to (5).
(12)
The plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors;
The beam identification information for identifying each of the plurality of three-dimensional beams is information for identifying a set of weighting factors for forming each of the plurality of three-dimensional beams.
The communication control device according to (11).
(13)
The three-dimensional beam determined based on the notified beam identification information is the three-dimensional beam identified from the notified beam identification information or the three-dimensional beam identified from the notified beam identification information. The communication control device according to (11) or (12), wherein the communication control device is a three-dimensional beam determined on the basis of the three-dimensional beam.
(14)
Obtaining beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam;
Controlling the transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams such that each of the plurality of three-dimensional beams carries beam specific information corresponding to the plurality of three-dimensional beams;
When feedback corresponding to any of the beam specific information is performed by the terminal device, the information addressed to the terminal device is transmitted so that a three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Controlling the transmission of
Including a communication control method.
(15)
A terminal device,
When each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam carries beam identification information for identifying itself, any one of the plurality of three-dimensional beams An acquisition unit for acquiring beam identification information for identifying a three-dimensional beam;
A notification unit for notifying the acquired beam identification information;
With
The beam identification information to be notified is information used to determine a three-dimensional beam carrying information addressed to the terminal device.
Terminal device.
(1)
3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する取得部と、
前記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御する制御部と、
を備え、
前記制御部は、いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、前記端末装置宛の情報を搬送するように、前記端末装置宛の前記情報の送信を制御する、
通信制御装置。
(2)
前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、システム情報の一部として送信される情報である、前記(1)に記載の通信制御装置。
(3)
前記制御部は、前記複数の3次元ビームの各々が、前記システム情報の前記一部として、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御する、前記(2)に記載の通信制御装置。
(4)
前記制御部は、前記複数の3次元ビームの各々が、前記システム情報の前記一部を含む情報の送信のために割り当てられる無線リソースを示す情報を搬送するように、前記無線リソースを示す前記情報の送信を制御する、前記(2)又は(3)に記載の通信制御装置。
(5)
前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームである、前記(1)~(4)のいずれか1項に記載の通信制御装置。
(6)
前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、前記複数の3次元ビームの各々に対応するランダムアクセスチャネルを示す情報であり、
自らに対応する前記ビーム固有情報は、自らに対応するランダムアクセスチャネルを示す情報であり、
いずれかのビーム固有情報に対応する前記フィードバックは、いずれかのランダムアクセスチャネルでのランダムアクセス手続きであり、
前記フィードバックに応じて決定される3次元ビームは、前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに基づき決定される3次元ビームである、
前記(1)~(5)のいずれか1項に記載の通信制御装置。
(7)
前記複数の3次元ビームの各々に対応するランダムアクセスチャネルは、前記複数の3次元ビームの他の3次元ビームに対応するランダムアクセスチャネルと異なる、前記(6)に記載の通信制御装置。
(8)
前記複数の3次元ビームの各々に対応するランダムアクセスチャネルを示す前記情報は、システム情報の一部として送信される情報であり、
前記システム情報の前記一部は、物理ランダムアクセスチャネルコンフィギュレーションインデックス及び物理ランダムアクセスチャネル周波数オフセットを含む、前記(6)又は(7)に記載の通信制御装置。
(9)
前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームであり、
前記複数の3次元ビームの各々に対応するランダムアクセスチャネルは、前記複数の3次元ビームの各々を形成するための重み係数のセットに対応するランダムアクセスチャネルである、
前記(6)~(8)のいずれか1項に記載の通信制御装置。
(10)
前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに基づき決定される3次元ビームは、前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに対応する3次元ビーム、又は当該ランダムアクセスチャネルに対応する当該3次元ビームに基づき決定される3次元ビームである、前記(6)~(9)のいずれか1項に記載の通信制御装置。
(11)
前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、前記複数の3次元ビームの各々を識別するためのビーム識別情報であり、
自らに対応する前記ビーム固有情報は、自らを識別するためのビーム識別情報であり、
いずれかのビーム固有情報に対応する前記フィードバックは、いずれかのビーム識別情報の通知であり、
前記フィードバックに応じて決定される3次元ビームは、通知される前記ビーム識別情報に基づき決定される3次元ビームである、
前記(1)~(5)のいずれか1項に記載の通信制御装置。
(12)
前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームであり、
前記複数の3次元ビームの各々を識別するための前記ビーム識別情報は、前記複数の3次元ビームの各々を形成するための重み係数のセットを識別するための情報である、
前記(11)に記載の通信制御装置。
(13)
通知される前記ビーム識別情報に基づき決定される前記3次元ビームは、通知される前記ビーム識別情報から識別される3次元ビーム、又は通知される当該ビーム識別情報から識別される当該3次元ビームに基づき決定される3次元ビームである、前記(11)又は(12)に記載の通信制御装置。
(14)
3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得することと、
前記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御することと、
いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、前記端末装置宛の情報を搬送するように、前記端末装置宛の前記情報の送信を制御することと、
を含む通信制御方法。
(15)
端末装置であって、
3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する場合に、前記複数の3次元ビームのうちのいずれかの3次元ビームを識別するためのビーム識別情報を取得する取得部と、
取得される前記ビーム識別情報を通知する通知部と、
を備え、
通知される前記ビーム識別情報は、前記端末装置宛の情報を搬送する3次元ビームを決定するために用いられる情報である、
端末装置。 The following configurations also belong to the technical scope of the present disclosure.
(1)
An acquisition unit that acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam;
A control unit that controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the plurality of three-dimensional beams;
With
When the feedback corresponding to any of the beam specific information is performed by the terminal device, the control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Control the transmission of the information addressed to the device;
Communication control device.
(2)
The communication control apparatus according to (1), wherein the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information.
(3)
The control unit includes the beam corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information. The communication control device according to (2), which controls transmission of unique information.
(4)
The control unit includes the information indicating the radio resource such that each of the plurality of three-dimensional beams carries information indicating a radio resource allocated for transmission of information including the part of the system information. The communication control device according to (2) or (3), wherein the transmission control is performed.
(5)
The communication control device according to any one of (1) to (4), wherein the plurality of three-dimensional beams are three-dimensional beams formed by sets having different weighting factors.
(6)
The beam specific information corresponding to each of the plurality of three-dimensional beams is information indicating a random access channel corresponding to each of the plurality of three-dimensional beams,
The beam specific information corresponding to itself is information indicating a random access channel corresponding to itself,
The feedback corresponding to any beam specific information is a random access procedure on any random access channel;
The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the random access channel on which the random access procedure has been performed.
The communication control apparatus according to any one of (1) to (5).
(7)
The communication control device according to (6), wherein a random access channel corresponding to each of the plurality of three-dimensional beams is different from a random access channel corresponding to another three-dimensional beam of the plurality of three-dimensional beams.
(8)
The information indicating a random access channel corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information;
The communication control apparatus according to (6) or (7), wherein the part of the system information includes a physical random access channel configuration index and a physical random access channel frequency offset.
(9)
The plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors;
The random access channel corresponding to each of the plurality of three-dimensional beams is a random access channel corresponding to a set of weighting factors for forming each of the plurality of three-dimensional beams.
The communication control apparatus according to any one of (6) to (8).
(10)
The three-dimensional beam determined based on the random access channel on which the random access procedure has been performed is a three-dimensional beam corresponding to the random access channel on which the random access procedure has been performed, or the corresponding to the random access channel. The communication control device according to any one of (6) to (9), wherein the communication control device is a three-dimensional beam determined based on the three-dimensional beam.
(11)
The beam specific information corresponding to each of the plurality of three-dimensional beams is beam identification information for identifying each of the plurality of three-dimensional beams,
The beam specific information corresponding to itself is beam identification information for identifying itself,
The feedback corresponding to any beam specific information is a notification of any beam identification information;
The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the notified beam identification information.
The communication control apparatus according to any one of (1) to (5).
(12)
The plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors;
The beam identification information for identifying each of the plurality of three-dimensional beams is information for identifying a set of weighting factors for forming each of the plurality of three-dimensional beams.
The communication control device according to (11).
(13)
The three-dimensional beam determined based on the notified beam identification information is the three-dimensional beam identified from the notified beam identification information or the three-dimensional beam identified from the notified beam identification information. The communication control device according to (11) or (12), wherein the communication control device is a three-dimensional beam determined on the basis of the three-dimensional beam.
(14)
Obtaining beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam;
Controlling the transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams such that each of the plurality of three-dimensional beams carries beam specific information corresponding to the plurality of three-dimensional beams;
When feedback corresponding to any of the beam specific information is performed by the terminal device, the information addressed to the terminal device is transmitted so that a three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Controlling the transmission of
Including a communication control method.
(15)
A terminal device,
When each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam carries beam identification information for identifying itself, any one of the plurality of three-dimensional beams An acquisition unit for acquiring beam identification information for identifying a three-dimensional beam;
A notification unit for notifying the acquired beam identification information;
With
The beam identification information to be notified is information used to determine a three-dimensional beam carrying information addressed to the terminal device.
Terminal device.
1 通信システム
10 セル
20 3次元ビーム
30 通信領域
100 基地局
151、171 情報取得部
153、173 送信制御部
200 端末装置
261 情報取得部
263 通知部 DESCRIPTION OFSYMBOLS 1 Communication system 10 Cell 20 Three-dimensional beam 30 Communication area 100 Base station 151,171 Information acquisition part 153,173 Transmission control part 200 Terminal device 261 Information acquisition part 263 Notification part
10 セル
20 3次元ビーム
30 通信領域
100 基地局
151、171 情報取得部
153、173 送信制御部
200 端末装置
261 情報取得部
263 通知部 DESCRIPTION OF
Claims (15)
- 3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得する取得部と、
前記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御する制御部と、
を備え、
前記制御部は、いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、前記端末装置宛の情報を搬送するように、前記端末装置宛の前記情報の送信を制御する、
通信制御装置。 An acquisition unit that acquires beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam;
A control unit that controls transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam specific information corresponding to the plurality of three-dimensional beams;
With
When the feedback corresponding to any of the beam specific information is performed by the terminal device, the control unit is configured so that the three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Control the transmission of the information addressed to the device;
Communication control device. - 前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、システム情報の一部として送信される情報である、請求項1に記載の通信制御装置。 The communication control apparatus according to claim 1, wherein the beam specific information corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information.
- 前記制御部は、前記複数の3次元ビームの各々が、前記システム情報の前記一部として、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御する、請求項2に記載の通信制御装置。 The control unit includes the beam corresponding to each of the plurality of three-dimensional beams so that each of the plurality of three-dimensional beams carries beam-specific information corresponding to itself as the part of the system information. The communication control device according to claim 2, which controls transmission of the unique information.
- 前記制御部は、前記複数の3次元ビームの各々が、前記システム情報の前記一部を含む情報の送信のために割り当てられる無線リソースを示す情報を搬送するように、前記無線リソースを示す前記情報の送信を制御する、請求項2に記載の通信制御装置。 The control unit includes the information indicating the radio resource such that each of the plurality of three-dimensional beams carries information indicating a radio resource allocated for transmission of information including the part of the system information. The communication control device according to claim 2, wherein the communication control device controls transmission.
- 前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームである、請求項1に記載の通信制御装置。 The communication control device according to claim 1, wherein the plurality of three-dimensional beams are three-dimensional beams formed by sets having different weighting factors.
- 前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、前記複数の3次元ビームの各々に対応するランダムアクセスチャネルを示す情報であり、
自らに対応する前記ビーム固有情報は、自らに対応するランダムアクセスチャネルを示す情報であり、
いずれかのビーム固有情報に対応する前記フィードバックは、いずれかのランダムアクセスチャネルでのランダムアクセス手続きであり、
前記フィードバックに応じて決定される3次元ビームは、前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに基づき決定される3次元ビームである、
請求項1に記載の通信制御装置。 The beam specific information corresponding to each of the plurality of three-dimensional beams is information indicating a random access channel corresponding to each of the plurality of three-dimensional beams,
The beam specific information corresponding to itself is information indicating a random access channel corresponding to itself,
The feedback corresponding to any beam specific information is a random access procedure on any random access channel;
The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the random access channel on which the random access procedure has been performed.
The communication control apparatus according to claim 1. - 前記複数の3次元ビームの各々に対応するランダムアクセスチャネルは、前記複数の3次元ビームの他の3次元ビームに対応するランダムアクセスチャネルと異なる、請求項6に記載の通信制御装置。 The communication control device according to claim 6, wherein a random access channel corresponding to each of the plurality of three-dimensional beams is different from a random access channel corresponding to another three-dimensional beam of the plurality of three-dimensional beams.
- 前記複数の3次元ビームの各々に対応するランダムアクセスチャネルを示す前記情報は、システム情報の一部として送信される情報であり、
前記システム情報の前記一部は、物理ランダムアクセスチャネルコンフィギュレーションインデックス及び物理ランダムアクセスチャネル周波数オフセットを含む、請求項6に記載の通信制御装置。 The information indicating a random access channel corresponding to each of the plurality of three-dimensional beams is information transmitted as part of system information;
The communication control apparatus according to claim 6, wherein the part of the system information includes a physical random access channel configuration index and a physical random access channel frequency offset. - 前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームであり、
前記複数の3次元ビームの各々に対応するランダムアクセスチャネルは、前記複数の3次元ビームの各々を形成するための重み係数のセットに対応するランダムアクセスチャネルである、
請求項6に記載の通信制御装置。 The plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors,
The random access channel corresponding to each of the plurality of three-dimensional beams is a random access channel corresponding to a set of weighting factors for forming each of the plurality of three-dimensional beams.
The communication control apparatus according to claim 6. - 前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに基づき決定される3次元ビームは、前記ランダムアクセス手続きが行われた前記ランダムアクセスチャネルに対応する3次元ビーム、又は当該ランダムアクセスチャネルに対応する当該3次元ビームに基づき決定される3次元ビームである、請求項6に記載の通信制御装置。 The three-dimensional beam determined based on the random access channel on which the random access procedure has been performed is a three-dimensional beam corresponding to the random access channel on which the random access procedure has been performed, or the corresponding to the random access channel. The communication control device according to claim 6, wherein the communication control device is a three-dimensional beam determined based on the three-dimensional beam.
- 前記複数の3次元ビームの各々に対応する前記ビーム固有情報は、前記複数の3次元ビームの各々を識別するためのビーム識別情報であり、
自らに対応する前記ビーム固有情報は、自らを識別するためのビーム識別情報であり、
いずれかのビーム固有情報に対応する前記フィードバックは、いずれかのビーム識別情報の通知であり、
前記フィードバックに応じて決定される3次元ビームは、通知される前記ビーム識別情報に基づき決定される3次元ビームである、
請求項1に記載の通信制御装置。 The beam specific information corresponding to each of the plurality of three-dimensional beams is beam identification information for identifying each of the plurality of three-dimensional beams,
The beam specific information corresponding to itself is beam identification information for identifying itself,
The feedback corresponding to any beam specific information is a notification of any beam identification information;
The three-dimensional beam determined according to the feedback is a three-dimensional beam determined based on the notified beam identification information.
The communication control apparatus according to claim 1. - 前記複数の3次元ビームは、重み係数の異なるセットにより形成される3次元ビームであり、
前記複数の3次元ビームの各々を識別するための前記ビーム識別情報は、前記複数の3次元ビームの各々を形成するための重み係数のセットを識別するための情報である、
請求項11に記載の通信制御装置。 The plurality of three-dimensional beams are three-dimensional beams formed by different sets of weighting factors;
The beam identification information for identifying each of the plurality of three-dimensional beams is information for identifying a set of weighting factors for forming each of the plurality of three-dimensional beams.
The communication control apparatus according to claim 11. - 通知される前記ビーム識別情報に基づき決定される前記3次元ビームは、通知される前記ビーム識別情報から識別される3次元ビーム、又は通知される当該ビーム識別情報から識別される当該3次元ビームに基づき決定される3次元ビームである、請求項11に記載の通信制御装置。 The three-dimensional beam determined based on the notified beam identification information is the three-dimensional beam identified from the notified beam identification information or the three-dimensional beam identified from the notified beam identification information. 12. The communication control apparatus according to claim 11, wherein the communication control apparatus is a three-dimensional beam determined based on the three-dimensional beam.
- 3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々に対応するビーム固有情報を取得することと、
前記複数の3次元ビームの各々が、自らに対応するビーム固有情報を搬送するように、前記複数の3次元ビームの各々に対応する前記ビーム固有情報の送信を制御することと、
いずれかのビーム固有情報に対応するフィードバックが端末装置により行われると、当該フィードバックに応じて決定される3次元ビームが、前記端末装置宛の情報を搬送するように、前記端末装置宛の前記情報の送信を制御することと、
を含む通信制御方法。 Obtaining beam specific information corresponding to each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam;
Controlling the transmission of the beam specific information corresponding to each of the plurality of three-dimensional beams such that each of the plurality of three-dimensional beams carries beam specific information corresponding to the plurality of three-dimensional beams;
When feedback corresponding to any of the beam specific information is performed by the terminal device, the information addressed to the terminal device is transmitted so that a three-dimensional beam determined according to the feedback carries information addressed to the terminal device. Controlling the transmission of
Including a communication control method. - 端末装置であって、
3次元ビームを形成可能な指向性アンテナにより形成される複数の3次元ビームの各々が、自らを識別するためのビーム識別情報を搬送する場合に、前記複数の3次元ビームのうちのいずれかの3次元ビームを識別するためのビーム識別情報を取得する取得部と、
取得される前記ビーム識別情報を通知する通知部と、
を備え、
通知される前記ビーム識別情報は、前記端末装置宛の情報を搬送する3次元ビームを決定するために用いられる情報である、
端末装置。 A terminal device,
When each of a plurality of three-dimensional beams formed by a directional antenna capable of forming a three-dimensional beam carries beam identification information for identifying itself, any one of the plurality of three-dimensional beams An acquisition unit for acquiring beam identification information for identifying a three-dimensional beam;
A notification unit for notifying the acquired beam identification information;
With
The beam identification information to be notified is information used to determine a three-dimensional beam carrying information addressed to the terminal device.
Terminal device.
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JP2018527802A (en) * | 2015-07-31 | 2018-09-20 | 株式会社Nttドコモ | Beam reference signal transmission method, beam selection method, base station, and user terminal |
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JP7287779B2 (en) | 2016-03-24 | 2023-06-06 | 株式会社Nttドコモ | Radio base station, outrigger, and communication control method |
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JP2018527802A (en) * | 2015-07-31 | 2018-09-20 | 株式会社Nttドコモ | Beam reference signal transmission method, beam selection method, base station, and user terminal |
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