WO2018025556A1 - ビームフォーミングに関連する装置、方法、システム、プログラム及び記録媒体 - Google Patents

ビームフォーミングに関連する装置、方法、システム、プログラム及び記録媒体 Download PDF

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Publication number
WO2018025556A1
WO2018025556A1 PCT/JP2017/024584 JP2017024584W WO2018025556A1 WO 2018025556 A1 WO2018025556 A1 WO 2018025556A1 JP 2017024584 W JP2017024584 W JP 2017024584W WO 2018025556 A1 WO2018025556 A1 WO 2018025556A1
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WO
WIPO (PCT)
Prior art keywords
base station
related information
processing unit
information
beam related
Prior art date
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Ceased
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PCT/JP2017/024584
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English (en)
French (fr)
Japanese (ja)
Inventor
賢吾 桶谷
尚 二木
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NEC Corp
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NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP17836663.9A priority Critical patent/EP3496459A4/en
Priority to CN201780047632.5A priority patent/CN109565731B/zh
Priority to EP23219836.6A priority patent/EP4325735A3/en
Priority to CN202111332146.2A priority patent/CN114142901B/zh
Priority to JP2018531783A priority patent/JP6658891B2/ja
Priority to US16/321,749 priority patent/US10849027B2/en
Application filed by NEC Corp filed Critical NEC Corp
Publication of WO2018025556A1 publication Critical patent/WO2018025556A1/ja
Anticipated expiration legal-status Critical
Priority to US17/077,238 priority patent/US11516711B2/en
Priority to US17/968,860 priority patent/US20230040491A1/en
Priority to US18/774,150 priority patent/US20240373298A1/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H04W36/0044—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of quality context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/085—Reselecting an access point involving beams of access points

Definitions

  • the present invention relates to an apparatus, a method, a system, a program, and a recording medium related to beam forming.
  • a higher frequency band of several tens of gigahertz can be used.
  • 5G fifth generation
  • all downlink signals / downlink channels including not only system information and paging information, but also common pilot signals or reference signals, etc. are compensated using beamforming to compensate for large propagation losses. It can also be sent. Similarly, for the uplink, it is also conceivable that all uplink signals / uplink channels are received using beamforming in order to compensate for propagation loss.
  • Patent Document 1 discloses a technique for including a downlink beam ID and an uplink beam ID in a handover request message transmitted from a source base station for handover of a terminal device to a target base station. Furthermore, according to Patent Document 1, the downlink beam ID is used to indicate a downlink beam for transmitting data to the terminal apparatus after handover, and the uplink beam ID is transmitted from the terminal apparatus after handover. Used to indicate an uplink beam for receiving data. This makes it possible to omit the operation for selecting a beam at the time of handover, and the delay in handover is reduced.
  • propagation loss is compensated for transmission / reception of data after handover, but propagation loss is not caused by transmission / reception of a control signal between a terminal apparatus and a target base station in handover. Not compensated.
  • an access signal of a terminal device for example, an uplink signal in random access
  • the handover failure rate may increase.
  • An object of the present invention is to make it possible to increase the possibility of successful handover.
  • a first apparatus of the present invention includes a first communication processing unit that transmits a reference signal using beamforming, and a second communication processing unit that receives a handover message from a source base station for handover of a terminal device.
  • the handover message includes beam related information regarding the beam.
  • the first communication processing unit receives an access signal of the terminal device based on the beam related information.
  • a second apparatus of the present invention receives first beam-related information about a base station that transmits reference signals by using beamforming, from the terminal apparatus. 1 communication processing part, and the 2nd communication processing part which transmits the hand-over message containing the 2nd beam related information corresponding to the said 1st beam related information to the said base station.
  • the second beam related information is information used by the base station to receive an access signal of the terminal device.
  • a third apparatus of the present invention includes: a reception processing unit that receives a reference signal transmitted by beam forming using a first base station; and first beam related information related to a beam, the first base station A transmission processing unit that transmits the first beam-related information about the station to the second base station.
  • the first beam related information corresponds to second beam related information used by the first base station to receive an access signal.
  • the first method of the present invention includes transmitting a reference signal using beamforming, receiving a handover message including beam-related information about a beam from a source base station for handover of the terminal device, and the beam-related Receiving an access signal of the terminal device based on the information.
  • first beam related information on a beam is received from a terminal device. And transmitting a handover message including second beam related information corresponding to the first beam related information to the base station.
  • the second beam related information is information used by the base station to receive an access signal of the terminal device.
  • a third method of the present invention includes receiving a reference signal transmitted using beamforming by a first base station, and first beam related information related to a beam, the first base station Transmitting the first beam related information of the first base station to a second base station; including.
  • the first beam related information corresponds to second beam related information used by the first base station to receive an access signal.
  • the system of the present invention includes a first base station, a second base station, and a terminal device.
  • the first base station transmits a reference signal using beam forming.
  • the terminal apparatus receives the reference signal and transmits the first beam related information regarding the first base station to the second base station, which is first beam related information regarding the beam. .
  • the second base station transmits a handover message including second beam related information corresponding to the first beam related information to the first base station.
  • the first base station receives an access signal of the terminal device based on the second beam related information.
  • a first program of the present invention includes transmitting a reference signal using beamforming, receiving a handover message including beam related information regarding a beam from a source base station for handover of a terminal device, and the beam related A program for causing a processor to receive an access signal of the terminal device based on information.
  • the second program of the present invention receives the first beam related information about the base station that transmits the reference signal using beam forming, which is the first beam related information related to the beam, from the terminal device. And a program for causing a processor to execute a handover message including second beam related information corresponding to the first beam related information to the base station.
  • the second beam related information is information used by the base station to receive an access signal of the terminal device.
  • a third program of the present invention is a method for receiving a reference signal transmitted by a first base station using beamforming, and first beam related information related to a beam, the first base station The first beam related information is transmitted to the second base station.
  • the first beam related information corresponds to second beam related information used by the first base station to receive an access signal.
  • the first recording medium of the present invention transmits a reference signal using beam forming, receives a handover message including beam related information regarding the beam from a source base station of the handover of the terminal device, and the beam
  • a computer-readable non-transitory recording medium storing a program for causing a processor to receive an access signal of the terminal device based on related information.
  • the second recording medium of the present invention receives the first beam related information regarding the base station that transmits the reference signal using beam forming, which is the first beam related information related to the beam, from the terminal device. And a computer that records a program for causing a processor to execute a handover message including second beam related information corresponding to the first beam related information to the base station. It is a non-temporary recording medium.
  • the second beam related information is information used by the base station to receive an access signal of the terminal device.
  • a reference signal transmitted by a first base station using beamforming, and first beam related information related to a beam wherein the first base station Transmitting the first beam related information for to a second base station; Is a non-transitory recording medium that can be read by a computer in which a program for causing a processor to execute is stored.
  • the first beam related information corresponds to second beam related information used by the first base station to receive an access signal.
  • another effect may be show
  • all downlink signals / downlink channels including not only system information and paging information, but also common pilot signals or reference signals, etc. are compensated using beamforming to compensate for large propagation losses. It can also be sent. Similarly, for the uplink, it is also conceivable that all uplink signals / uplink channels are received using beamforming in order to compensate for propagation loss.
  • the patent document Japanese Patent Publication No. 2014-531852
  • Japanese Patent Publication No. 2014-531852 includes a downlink beam ID and an uplink beam ID in a handover request message transmitted from a source base station to a target base station for handover of a terminal device.
  • Techniques are disclosed.
  • the downlink beam ID is used to indicate a downlink beam for transmitting data to the terminal apparatus after handover
  • the uplink beam ID is transmitted from the terminal apparatus after handover. Used to indicate an uplink beam for receiving data. This makes it possible to omit the operation for selecting a beam at the time of handover, and the delay in handover is reduced.
  • propagation loss is compensated for transmission / reception of data after handover, but propagation loss is not caused by transmission / reception of a control signal between the terminal apparatus and the target base station in handover. Not compensated.
  • an access signal of a terminal device for example, an uplink signal in random access
  • the handover failure rate may increase.
  • a first base station (a base station located in the vicinity of a terminal device) transmits a reference signal using beamforming, and the terminal device Measure the reference signal. Further, the terminal apparatus transmits the first beam related information (and measurement result) about the first base station to the second base station (serving base station of the terminal apparatus).
  • the first beam related information indicates one of a plurality of sets of beamforming weights (for example, a preferable beamforming weight).
  • the terminal device is handed over from the second base station (source base station) to the first base station (target base station).
  • the second base station (source base station) includes the second beam related information (for example, the same information as the first beam related information) corresponding to the first beam related information.
  • a handover message (for example, a handover request message) is transmitted to the first base station (target base station).
  • the first base station receives the access signal of the terminal device based on the second beam related information.
  • the first base station receives the access signal using the preferred beamforming weight.
  • FIG. 1 is an explanatory diagram illustrating an example of a schematic configuration of a system 1 according to the first embodiment.
  • the system 1 includes a base station 100, a base station 200, and a terminal device 300.
  • the system 1 may be a system that complies with the standard of 3GPP (Third Generation Partnership Project). More specifically, for example, the system 1 may be a system that complies with a fifth generation (5G) standard.
  • 3GPP Third Generation Partnership Project
  • 5G fifth generation
  • Base station 100 The base station 100 performs wireless communication with a terminal device located in the cell 10 (or the coverage area 10). In the first embodiment, the base station 100 performs wireless communication using beamforming.
  • the reference signal is a signal for measurement of reception strength and / or reception quality, for example, CRS (Cell-specific Reference Signal) or CSI-RS (Channel State Information Reference) in LTE (Long Term Evolution). Signal).
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference
  • LTE Long Term Evolution
  • the above reference signal may also be referred to as CRS or CSI-RS, as in LTE, or another name (eg, “XXX reference signal” (XXX is an arbitrary term), “pilot signal”, or completely It may be called with a different signal name).
  • the base station 100 uses beamforming for all types of reference signals (eg, CRS, CSI-RS, UE-specific RS, and / or MBSFN (Multicast / Broadcast over a Single Frequency Network) RS, etc. ) May be sent.
  • the base station 100 may transmit some types of reference signals using beamforming, and may transmit the remaining types of reference signals without using beamforming.
  • the base station 100 may transmit not only the data and the reference signal but also other downlink signals / downlink channels (for example, all signals / channels) using beamforming.
  • the base station 100 is a node that performs wireless communication with the terminal device, in other words, a RAN (Radio Access Network) node.
  • the base station 100 may be a NodeB, an H-NodeB (Home Node B), an eNodeB (evolved Node B), or a He-eNodeB (Home evolved Node B), or a gNodeB (generation Node B) in 5G It may be.
  • the base station 100 may include a plurality of units (or a plurality of nodes).
  • the plurality of units include a first unit (or first node) that performs processing of a lower protocol layer and a second unit (or second node) that performs processing of an upper protocol layer. May be included.
  • the first unit may be called a distributed unit (DU) or an access unit (AU), and the second unit may be a central unit (CU). ) May be called.
  • the first unit may be called a radio unit (RU) or a remote unit (RU), and the second unit may be a digital unit (DU). ) May be called.
  • the RU may be RRH (Remote Radio Head) or RRU (Remote Radio Unit), and the DU may be BBU (Base Band Unit).
  • the names of the first unit (or first node) and the second unit (or second node) are not limited to this example.
  • the base station 100 may be a single unit (or a single node).
  • the base station 100 may be one of the plurality of units (for example, one of the first unit and the second unit), and the other of the plurality of units. It may be connected to a unit (for example, the other of the first unit and the second unit).
  • Base station 200 The base station 200 performs wireless communication with a terminal device located in the cell 20 (or the coverage area 20).
  • the base station 200 performs radio communication with the terminal device using beamforming.
  • the base station 200 may perform radio communication with the terminal device using beam forming in a mode different from the base station 100, or perform radio communication with the terminal device without using beam forming. Also good.
  • the base station 200 is a node that performs wireless communication with the terminal device, in other words, a RAN node.
  • Terminal device 300 performs wireless communication with the base station.
  • the terminal device 300 performs wireless communication with the base station 100 when positioned in the cell 10, and performs wireless communication with the base station 200 when positioned in the cell 20.
  • the terminal device 300 is handed over from the base station 200 to the base station 100 (for example, due to the movement of the terminal device 300).
  • the base station 200 is the source base station for the handover
  • the base station 100 is the target base station for the handover.
  • FIG. 2 is a block diagram illustrating an example of a schematic configuration of the base station 100 according to the first embodiment.
  • the base station 100 includes a wireless communication unit 110, a network communication unit 120, a storage unit 130, and a processing unit 140.
  • the wireless communication unit 110 transmits and receives signals wirelessly.
  • the wireless communication unit 110 receives a signal from the terminal device and transmits a signal to the terminal device.
  • the network communication unit 120 receives a signal from the backhaul and transmits a signal to the backhaul.
  • Storage unit 130 The storage unit 130 temporarily or permanently stores programs and parameters for the operation of the base station 100 and various data.
  • the processing unit 140 provides various functions of the base station 100.
  • the processing unit 140 includes a first communication processing unit 141 and a second communication processing unit 143.
  • the processing unit 140 may further include other components other than these components. That is, the processing unit 140 can perform operations other than the operations of these components. Specific operations of the first communication processing unit 141 and the second communication processing unit 143 will be described in detail later.
  • the processing unit 140 (first communication processing unit 141) communicates with a terminal device (for example, the terminal device 300) via the wireless communication unit 110.
  • the processing unit 140 (second communication processing unit 143) communicates with another network node (for example, the base station 200) via the network communication unit 120.
  • the wireless communication unit 110 may be mounted with an antenna and a radio frequency (RF) circuit, and the antenna may be a directional antenna.
  • the network communication unit 120 may be implemented by a network adapter or a network interface card.
  • the storage unit 130 may be implemented by a memory (for example, a nonvolatile memory and / or a volatile memory) and / or a hard disk.
  • the processing unit 140 may be implemented by a baseband (BB) processor and / or another processor.
  • the first communication processing unit 141 and the second communication processing unit 143 may be implemented by the same processor, or may be separately implemented by different processors.
  • the memory (storage unit 130) may be included in such a processor (chip).
  • the base station 100 may include a memory that stores a program and one or more processors that can execute the program, and the one or more processors include the processing unit 140 (the first communication processing unit 141 and the second communication unit).
  • the operation of the communication processing unit 143) may be performed.
  • the program may be a program for causing the one or more processors to execute the operation of the processing unit 140 (the first communication processing unit 141 and the second communication processing unit 143).
  • FIG. 3 is a block diagram illustrating an example of a schematic configuration of the base station 200 according to the first embodiment.
  • the base station 200 includes a wireless communication unit 210, a network communication unit 220, a storage unit 230, and a processing unit 240.
  • the wireless communication unit 210 transmits and receives signals wirelessly. For example, the wireless communication unit 210 receives a signal from the terminal device and transmits a signal to the terminal device.
  • the network communication unit 220 receives signals from the backhaul and transmits signals to the backhaul.
  • Storage unit 230 The storage unit 230 temporarily or permanently stores programs and parameters for the operation of the base station 200 and various data.
  • the processing unit 240 provides various functions of the base station 200.
  • the processing unit 240 includes a first communication processing unit 241 and a second communication processing unit 243.
  • the processing unit 240 may further include other components other than these components. That is, the processing unit 240 can perform operations other than the operations of these components. Specific operations of the first communication processing unit 241 and the second communication processing unit 243 will be described in detail later.
  • the processing unit 240 (first communication processing unit 241) communicates with a terminal device (for example, the terminal device 300) via the wireless communication unit 210.
  • the processing unit 240 (second communication processing unit 243) communicates with another network node (for example, the base station 100) via the network communication unit 220.
  • the wireless communication unit 210 may be mounted with an antenna, a high frequency (RF) circuit, or the like, and the antenna may be a directional antenna.
  • the network communication unit 220 may be implemented by a network adapter or a network interface card.
  • the storage unit 230 may be implemented by a memory (for example, a nonvolatile memory and / or a volatile memory) and / or a hard disk.
  • the processing unit 240 may be implemented by a baseband (BB) processor and / or another processor.
  • the first communication processing unit 241 and the second communication processing unit 243 may be implemented by the same processor, or may be separately implemented by different processors.
  • the memory (storage unit 230) may be included in such a processor (chip).
  • the base station 200 may include a memory that stores a program, and one or more processors that can execute the program.
  • the one or more processors include the processing unit 240 (the first communication processing unit 241 and the second communication unit).
  • the operation of the communication processing unit 243) may be performed.
  • the program may be a program for causing the one or more processors to execute the operation of the processing unit 240 (the first communication processing unit 241 and the second communication processing unit 243).
  • FIG. 4 is a block diagram illustrating an example of a schematic configuration of the terminal device 300 according to the first embodiment.
  • the terminal device 300 includes a wireless communication unit 310, a storage unit 320, and a processing unit 330.
  • the wireless communication unit 310 transmits and receives signals wirelessly. For example, the wireless communication unit 310 receives a signal from the base station and transmits a signal to the base station.
  • Storage unit 320 The storage unit 320 temporarily or permanently stores programs and parameters for the operation of the terminal device 300 and various data.
  • Processing unit 330 provides various functions of the terminal device 300.
  • the processing unit 330 includes a reception processing unit 331 and a transmission processing unit 333.
  • the processing unit 330 may further include other components other than these components. That is, the processing unit 330 can perform operations other than the operations of these components. Specific operations of the reception processing unit 331 and the transmission processing unit 333 will be described in detail later.
  • the processing unit 330 communicates with a base station (for example, the base station 100 and / or the base station 200) via the wireless communication unit 310.
  • a base station for example, the base station 100 and / or the base station 200
  • the wireless communication unit 310 may be implemented by an antenna, a radio frequency (RF) circuit, or the like.
  • the storage unit 320 may be implemented by a memory (for example, a nonvolatile memory and / or a volatile memory) and / or a hard disk.
  • the processing unit 330 may be implemented by a baseband (BB) processor and / or another processor.
  • the reception processing unit 331 and the transmission processing unit 333 may be implemented by the same processor, or may be separately implemented by different processors.
  • the memory (storage unit 320) may be included in such a processor (chip).
  • the terminal device 300 may include a memory that stores a program and one or more processors that can execute the program.
  • the one or more processors include a processing unit 330 (a reception processing unit 331 and a transmission processing unit 333). ) May be performed.
  • the program may be a program for causing the one or more processors to execute the operation of the processing unit 330 (the reception processing unit 331 and the transmission processing unit 333).
  • the base station 100 transmits a reference signal using beamforming.
  • the terminal device 300 receives the reference signal.
  • the base station 100 is a peripheral base station for the terminal device 300
  • the serving base station for the terminal device 300 is the base station 200.
  • the terminal device 300 transmits the first beam related information regarding the base station 100, which is the first beam related information regarding the beam, to the base station 200.
  • the first communication processing unit 241) receives the first beam related information from the terminal device 300.
  • the terminal device 300 is handed over from the base station 200 (source base station) to the base station 100 (target).
  • the base station 200 (second communication processing unit 243) transmits a handover message (for example, a handover request message) including second beam related information corresponding to the first beam related information to the base station 100, and
  • the station 100 (second communication processing unit 143) receives the handover message from the base station 200.
  • the base station 100 (first communication processing unit 141) receives the access signal of the terminal device 300 based on the second beam related information.
  • the base station 100 transmits reference signals using multiple beams.
  • the plurality of beams can also be said to be beams that the base station 100 transmits signals (or beams that the base station 100 forms to transmit signals).
  • the plurality of beams are beams directed in different directions.
  • a beam here means a directional beam, for example, formed by multiplying a signal by a set of beamforming weights and transmitting the multiplied signal using a directional antenna. .
  • a specific example of the plurality of beams will be described with reference to FIG.
  • FIG. 5 is an explanatory diagram for explaining an example of a plurality of beams to which a reference signal is transmitted.
  • a base station 100 a cell 10, and 16 beams 11 (beams 11A to 11P) are shown.
  • the base station 100 transmits a reference signal using 16 beams 11.
  • each beam is identified by a beam index (or weight index).
  • the beam 11A is identified by an index # 0
  • the beam 11J is identified by an index # 9.
  • the base station 100 (first communication processing unit 141) transmits a reference signal using the plurality of beams by using different radio resources for each beam.
  • the radio resource is a time resource. That is, the base station 100 transmits the reference signal using the plurality of beams by using different time resources for each beam.
  • FIG. 6 is an explanatory diagram for explaining an example of a radio resource (time resource) used for transmitting a reference signal.
  • a radio resource time resource
  • 16 time slots time slots # 0 to # 15
  • a reference signal is transmitted by 16 beams within a beam search period 30 including 16 time slots.
  • a reference signal is transmitted by beam # 0 (beam 11A)
  • a reference signal is transmitted by beam # 1 (beam 11B).
  • a reference signal is transmitted by beam # 9 (beam 11J).
  • the time slots in which the reference signal is transmitted by the beam are continuous, but the time slots may not be continuous but may be discrete.
  • the time slot may be referred to as a subframe or simply referred to as a slot.
  • the radio resource may be a frequency resource. That is, the base station 100 may transmit the reference signal using the plurality of beams using different frequency resources for each beam. For example, the base station 100 transmits a reference signal by beam # 0 (beam 11A) in a first band (for example, a band having a resource block width of 1 or more) in a frequency band, and the base station 100 Within the band of 2, the reference signal may be transmitted by the beam # 1 (beam 11B).
  • the base station 100 uses the first carrier (for example, one or more subcarriers) within the block band (for example, a band of the resource block width) included in the frequency band, and uses the beam # 0 (beam 11A) as a reference.
  • a signal may be transmitted, and a reference signal may be transmitted by beam # 1 (beam 11B) using a second carrier in the block band.
  • the radio resource may be a time frequency resource. That is, the base station 100 may transmit the reference signal using the plurality of beams using different time frequency resources for each beam. For example, the base station 100 transmits a reference signal by beam # 0 (beam 11A) using a first time frequency resource (for example, one or more resource elements), and uses a second time frequency resource, The reference signal may be transmitted by the beam # 1 (beam 11B).
  • a first time frequency resource for example, one or more resource elements
  • the terminal device can identify the beam used for transmitting the reference signal.
  • the relationship between the beam and the radio resource may be fixed (for example, in the standard), or may be configured by an operator or network.
  • the base station 100 may transmit different reference signals for each beam instead of using different radio resources for each beam. Thereby, the beam used for transmission of the reference signal can be identified by the terminal device.
  • the terminal device 300 performs measurement of reference signals transmitted by the base station 100 using beamforming.
  • the terminal device 300 transmits a measurement report to the base station 200.
  • the measurement report includes a measurement result of a reference signal transmitted by the base station 100 using beamforming.
  • the measurement report further includes the first beam related information.
  • the terminal device 300 measures a reference signal transmitted by each beam, and selects a beam with the best measurement result (for example, the highest reception power or reception quality). In other words, the terminal device 300 selects a preferred beamforming weight. Then, the terminal device 300 transmits a measurement report including the first beam related information regarding the selected beam and the best measurement result to the base station 200.
  • the best measurement result for example, the highest reception power or reception quality.
  • the terminal device 300 selects a preferred beamforming weight.
  • the terminal device 300 transmits a measurement report including the first beam related information regarding the selected beam and the best measurement result to the base station 200.
  • FIG. 7 is an explanatory diagram for explaining an example of a measurement report of the terminal device 300.
  • a base station 100 and a terminal device 300 are shown.
  • the terminal device 300 measures the reference signal transmitted by each beam, and selects the beam # 9 (beam 11J) with the best measurement result.
  • the terminal apparatus 300 transmits a measurement report including first beam related information (for example, beam index / weight index of # 9) regarding the beam # 9 (beam 11J) and the best measurement result to the base station 200.
  • first beam related information for example, beam index / weight index of # 9
  • the base station 200 can acquire the first beam related information about the base station 100 through the measurement report.
  • the base station 200 transmits a handover message including the second beam related information to the base station 100 (target base station).
  • the handover message may be transmitted directly from the base station 200 to the base station 100 (for example, in the case of X2 handover), or may be transmitted from the base station 200 to the base station 100 via the core network ( For example, the case of S1 handover).
  • the handover message is a handover request (HANDOVER REQUEST) message.
  • HANDOVER REQUEST HANDOVER REQUEST
  • the message is not limited to the handover request message, and other messages transmitted from the source base station to the target base station in the handover procedure may be used.
  • the second beam related information is the same information as the first beam related information. That is, the base station 200 includes in the handover request message the second beam related information that is the same as the first beam related information received from the terminal device 300, and transmits the handover request message to the base station 100.
  • the second beam related information may be information different from the first beam related information.
  • the base station 100 may convert the first beam related information into the second beam related information, and transmit a handover request message including the second beam related information to the base station 100.
  • the beam related information (the first beam related information and the second beam related information) is information related to a beam. Since the beam is formed using beamforming weights (a set of beamforming weights), the beam and the set of beamforming weights can correspond to each other on a one-to-one basis. Therefore, it can be said that the beam related information is information related to beamforming weights (for example, weight related information).
  • the beam related information is information about the base station 100.
  • the beam related information is information related to the beam of the base station 100 (the beam used by the base station 100 for signal transmission).
  • the beam related information is information related to one of a plurality of beams.
  • the beam related information is information indicating one of the plurality of beams, in other words, information that enables identification of one of the plurality of beams (for example, beam identification). Information).
  • the beam related information is a beam index.
  • the beam-related information may be information indicating one of a plurality of sets of beamforming weights, in other words, information that enables identification of one of the plurality of sets (for example, weights). Identification information).
  • the beam related information may be a weight index. Since the beam is formed using a set of beamforming weights, the beam and the set of beamforming weights can correspond one to one with each other.
  • the beam-related information may be information (beam index) indicating one of the plurality of beams and the information (weight index) indicating one of the plurality of sets. Good.
  • the beam index and the weight index are called differently, but may be the same index.
  • the beam-related information may be other name information (such as a beam ID, weight ID, beamforming index, or beamforming ID) that allows identification of a set of beams or beamforming weights.
  • the base station 100 (first communication processing unit 141) receives an access signal of the terminal device 300 based on the second beam related information.
  • the base station 100 receives the access signal using a set of beamforming weights corresponding to the second beam related information.
  • the second beam related information is a beam index or a weight index
  • the base station 100 identifies a set of beamforming weights from the beam index or the weight index.
  • the base station 100 receives the access signal using the set of beamforming weights. That is, the base station 100 performs uplink beam forming processing by multiplying the access signal by the set of beam forming weights.
  • the access signal is an uplink signal used for initial access for transition from an idle state (for example, RRC_Idle) to an active state or a connected state (for example, RRC_Connected), or for access to a target cell during handover execution. May be.
  • the access signal may be an uplink signal in radio connection re-establishment (RRC Connection Re-establishment) for radio connection recovery.
  • the uplink signal may be a random access signal (eg, random access preamble signal), a control signal transmitted on an uplink data channel (eg, PUSCH (Physical Uplink Shared Channel)), or an uplink control channel (eg, PUCCH). It may be a control signal transmitted in (Physical Uplink Control Channel).
  • the terminal device 300 communicates with the base station 100 (by ranging and its response).
  • the communication with the base station 100 is started by the access signal without performing in advance. Therefore, successful reception of the access signal is very important.
  • the propagation loss of the signal is compensated, and as a result, the possibility of successful reception of the access signal is increased. . Therefore, the possibility that the handover is successful can be higher.
  • the beamforming weight set for the uplink is the same as the beamforming weight set for the downlink.
  • the set of beamforming weights for the uplink may be different from the set of beamforming weights for the downlink.
  • FIG. 8 is a sequence diagram for explaining an example of a schematic flow of processing according to the first embodiment.
  • the terminal device 300 measures a reference signal transmitted by the base station 100 using beamforming, and selects a preferable beamforming weight. Then, the terminal device 300 transmits a measurement report including a weight index indicating the preferable beamforming weight to the base station 200 (serving base station) (S401). The measurement report includes the measurement result of the reference signal.
  • the base station 200 sends a handover request message including a weight index indicating the preferred beamforming weight. Then, it transmits to the base station 100 (S403).
  • the base station 100 acquires the weight index included in the handover request message, and sends a handover request confirmation response (HANDOVER REQUEST ACKNOWLEDGE) message including a RRC layer handover command (HandoverCommand) message corresponding to the handover instruction to the base station 200. (S405).
  • HANDOVER REQUEST ACKNOWLEDGE a handover request confirmation response
  • HandoverCommand RRC layer handover command
  • the base station 200 transmits an RRC signal (for example, RRCConnectionReconfiguration message) including the handover command message to the terminal device 300 (S407).
  • RRC signal for example, RRCConnectionReconfiguration message
  • the terminal device 300 transmits an access signal to the base station 100 (S409).
  • Base station 100 receives the access signal based on the weight index. That is, the base station 100 receives the access signal using the beamforming weight indicated by the weight index.
  • “send” means, for example, that transmission processing is performed in at least one of a plurality of protocol layers, and a signal is output in a wired or wireless manner. Does not mean to do.
  • “receive” here means, for example, performing reception processing in at least one protocol layer among a plurality of protocol layers.
  • the plurality of protocol layers are a physical layer, a MAC (Media Access Control) layer, an RLC (Radio Link Control) layer, a PDCP (Packet Data Convergence Protocol) layer, and an RRC (Radio Resource Control) layer.
  • the plurality of protocol layers are a physical layer, a MAC layer, an IP (Internet Protocol) layer, and a transport layer.
  • “transmitting X to Y” here is not limited to transmitting X directly to Y, but indirectly transmitting X to Y (that is, transmitting X to another node). And X is transmitted to Y via the transfer by the other node).
  • “receiving X from Y” here is not limited to receiving X directly from Y, but indirectly receiving X from Y (ie, X transmitted by Y). Received via transfer by other nodes).
  • the base station 100 uses a radio resource for transmitting the access signal.
  • the resource information shown is transmitted to the base station 200, and the base station 200 (second communication processing unit 243) receives the resource information.
  • the base station 200 (first communication processing unit 241) transmits the resource information to the terminal device 300, and the terminal device 300 (reception processing unit 331) receives the resource information.
  • the terminal device 300 transmits an access signal to the base station 100 based on the resource information. That is, terminal apparatus 300 (transmission processing unit 333) transmits an access signal to base station 100 using the radio resource indicated by the resource information. The base station 100 receives the access signal transmitted using the radio resource (based on the second beam related information).
  • the base station 100 can receive the access signal of the terminal device 300 more easily.
  • the resource information may be referred to as dedicated random access channel resource information (Dedicated RACH Resource Information).
  • the radio resource is a radio resource for a set of beams or beamforming weights corresponding to the second beam related information.
  • a radio resource for access is prepared for each beam or for each set of beamforming weights.
  • the second beam-related information indicates a beam or a beamforming weight set
  • the radio resource indicated by the resource information is a radio resource for the beam or the beamforming weight set.
  • FIG. 9 is an explanatory diagram for explaining an example of the radio resource indicated by the resource information.
  • N time slots included in each radio frame are shown.
  • radio resources for access are prepared for each time slot.
  • time slot # 0 is a radio resource for accessing beam # 0.
  • base station 100 receives an access signal using a set of beamforming weights identified by beam index (or weight index) # 0.
  • time slot # N-1 is a radio resource for accessing beam # 15.
  • base station 100 receives an access signal using a set of beamforming weights identified by beam index (or weight index) # 15 in time slot # N-1.
  • the base station 100 can receive the access signal of the terminal device 300 more easily. This is because the base station 100 does not need to use various sets of beamforming weights in receiving an access signal, and only needs to use a specific set of beamforming weights.
  • the base station 100 (second communication processing unit 143) transmits, to the base station 200, retransmission cycle information indicating the retransmission cycle of the access signal together with the resource information, and the base station 200 (second communication).
  • the processing unit 243) receives the retransmission cycle information.
  • the base station 200 (first communication processing unit 241) transmits the retransmission cycle information to the terminal device 300, and the terminal device 300 (reception processing unit 331) receives the retransmission cycle information.
  • the terminal device 300 (transmission processing unit 333) retransmits the access signal to the base station 100 based on the retransmission cycle information. That is, terminal apparatus 300 (transmission processing unit 333) retransmits the access signal to base station 100 at the retransmission cycle indicated by the retransmission cycle information.
  • the base station 100 can more easily receive the retransmitted access signal.
  • the retransmission cycle information may be referred to as random access channel retransmission cycle information (RACH Retransmit Period Information).
  • the base station 100 (second communication processing unit 143) transmits a response message to the handover request message to the base station 200, and the base station 200 (second communication processing unit 243) transmits the response message.
  • the response message may be transmitted directly from the base station 100 to the base station 200 (for example, in the case of X2 handover), or may be transmitted from the base station 100 to the base station 200 via the core network ( For example, the case of S1 handover).
  • the response message includes the resource information and the retransmission cycle information.
  • the response message is a handover request confirmation response (HANDOVER REQUEST ACKNOWLEDGE) message.
  • the handover request confirmation response message includes an RRC container (Container), and the RRC container includes a handover command message.
  • the handover command message includes an RRC connection reconfiguration message, and the RRC connection reconfiguration message includes the resource information and the retransmission cycle information.
  • the first embodiment is not limited to this example, and the response message may include the resource information and the retransmission cycle information in another form.
  • the base station 200 transmits (transfers) a handover command message (included in the response message) to the terminal device 300, and the terminal device 300 (reception processing unit 331) Receive a command message.
  • the handover command message includes the resource information and the retransmission cycle information.
  • FIG. 10 is a sequence diagram for explaining an example of a schematic flow of a process according to the first modification of the first embodiment.
  • the description of steps S421 and S423 shown in FIG. 10 is the same as the description of steps S401 and S403 shown in FIG. 8, for example. Therefore, the overlapping description is omitted here, and only steps S425, S427, and S429 are described.
  • the base station 100 acquires the weight index included in the handover request message. Then, the base station 100 generates dedicated RACH resource information indicating radio resources for the beamforming weight set indicated by the weight index. Thereafter, the base station 100 transmits a handover command message including the dedicated RACH resource information to the base station 200 in the handover request confirmation response message (S425).
  • the handover command message may further include RACH retransmission cycle information.
  • the base station 200 transfers the handover command message to the terminal device 300 (S427).
  • the terminal device 300 transmits an access signal to the base station 100 using the radio resource indicated by the dedicated RACH resource information (S429).
  • the base station 100 receives the access signal transmitted using the radio resource based on the weight index. That is, the base station 100 receives the access signal transmitted using the radio resource (the radio resource for the beamforming weight set) using the beamforming weight set indicated by the weight index. . If retransmission is necessary, terminal apparatus 300 retransmits the access signal to base station 100 at the retransmission cycle indicated by the RACH retransmission cycle information.
  • the base station 100 transmits resource information indicating radio resources for transmitting the access signal to the base station 200, and the base station 200 receives the resource information.
  • the first modification is not limited to this example.
  • the base station 200 may generate the resource information.
  • the base station 200 may receive information necessary for generating the resource information (for example, information indicating radio resources for each beam) from the base station 100 in advance.
  • the amount of information transmitted and received between the base station 100 and the base station 200 can be further reduced.
  • the base station 100 uses the beam forming configuration related to the beam forming configuration of the base station 100. Information is transmitted to the base station 200. The base station 200 (second communication processing unit 243) receives the beamforming configuration related information.
  • the base station 200 (first communication processing unit 241) transmits the beamforming configuration information to the terminal device 300, and the terminal device 300 (reception processing unit 331) receives the beamforming configuration information.
  • the terminal device 300 receives a reference signal transmitted by the base station 100 using beamforming based on the beamforming configuration information. For example, the terminal device 300 (reception processing unit 331) measures the reference signal based on the beamforming configuration information.
  • a beamforming configuration suitable for the base station or the cell can be used, and the terminal device 300 can perform reception / measurement in accordance with the configuration.
  • the beamforming configuration information includes beam number information indicating the number of beams.
  • the beam number information indicates 16 as the number of beams. Thereby, for example, it is possible to use a number of beams according to the cell characteristics (for example, size).
  • the beamforming configuration information includes beam resource information indicating a radio resource for each beam for transmitting a reference signal.
  • the radio resource is a time resource for each beam.
  • the beam resource information includes a period and an offset in the time direction.
  • the radio resource may be a frequency resource for each beam.
  • the beam resource information may include a period and an offset in the frequency direction.
  • the radio resource may be a time frequency resource for each beam.
  • the beam resource information may be information indicating a radio resource pattern.
  • the base station 100 (second communication processing unit 143) transmits the beamforming configuration information to the base station 200 when setting up an interface between the base station 100 and the base station 200. Then, the base station 200 (second communication processing unit 243) receives the beamforming configuration information.
  • the base station 100 (second communication processing unit 143) transmits an X2 setup request (X2 SETUP REQUEST) message or an X2 setup response (X2 SETUP RESPONSE) message to the base station 200. Then, the base station 200 (second communication processing unit 243) receives the X2 setup request message or the X2 setup response message.
  • the X2 setup request message or the X2 setup response message includes the beamforming configuration information.
  • the base station 200 transmits a measurement configuration (measurement configuration) to the terminal device 300, and the terminal device 300 (reception processing unit 331) receives the measurement configuration.
  • the measurement configuration includes the beamforming configuration information.
  • FIG. 11 is a sequence diagram for explaining an example of a schematic flow of a process according to the second modification of the first embodiment.
  • the description of steps S449 to S455 shown in FIG. 11 is the same as the description of steps S403 to S409 shown in FIG. 8, for example. Therefore, the redundant description is omitted here, and only steps S441 to S447 are described.
  • the base station 200 transmits an X2 setup request message to the base station 100 (S441), and in response, the base station 100 transmits an X2 setup response message to the base station 200 (S443).
  • the X2 setup response message includes beamforming configuration information related to the beamforming configuration of the base station 100.
  • the base station 200 transmits a measurement configuration including the beamforming configuration information to the terminal device 300 (S445).
  • the terminal device 300 measures a reference signal transmitted by the base station 100 using beamforming based on the beamforming configuration information, and selects a preferable beamforming weight. Then, the terminal device 300 transmits a measurement report including a weight index indicating the preferable beamforming weight to the base station 200 (serving base station) (S447).
  • the measurement report includes the measurement result of the reference signal.
  • the (first communication processing unit 141) may receive an access signal of the terminal device 300 based on the second beam related information.
  • the terminal device 300 may transmit the access signal to the base station 100 based on the resource information.
  • the modification of the first embodiment has been described above. Two or more of the first to third modifications may be combined. That is, a combination of two or more technical features of the first to third modifications may be introduced.
  • FIG. 12 is an explanatory diagram illustrating an example of a schematic configuration of the system 2 according to the second embodiment.
  • the system 2 includes a base station 500, a base station 600, and a terminal device 700.
  • the system 1 may be a system compliant with the 3GPP standard. More specifically, for example, the system 1 may be a system that complies with a fifth generation (5G) standard.
  • 5G fifth generation
  • the description of the base station 500, the base station 600, and the terminal device 700 is the same as the description of the base station 100, the base station 200, and the terminal device 300 of the first embodiment. Therefore, the overlapping description is omitted here.
  • FIG. 13 is a block diagram illustrating an example of a schematic configuration of the base station 500 according to the second embodiment.
  • the base station 500 includes a first communication processing unit 510 and a second communication processing unit 520.
  • the first communication processing unit 510 and the second communication processing unit 520 may be implemented by a baseband (BB) processor and / or another processor.
  • the first communication processing unit 510 and the second communication processing unit 520 may be implemented by the same processor, or may be separately implemented by different processors.
  • the base station 500 may include a memory that stores a program and one or more processors that can execute the program.
  • the one or more processors include the first communication processing unit 510 and the second communication processing unit 520. May be performed.
  • the program may be a program for causing the one or more processors to execute the operations of the first communication processing unit 510 and the second communication processing unit 520.
  • FIG. 14 is a block diagram illustrating an example of a schematic configuration of the base station 600 according to the second embodiment.
  • the base station 600 includes a first communication processing unit 610 and a second communication processing unit 620.
  • the first communication processing unit 610 and the second communication processing unit 620 may be implemented by a baseband (BB) processor and / or other processors.
  • the first communication processing unit 610 and the second communication processing unit 620 may be implemented by the same processor, or may be separately implemented by different processors.
  • the base station 600 may include a memory that stores a program and one or more processors that can execute the program.
  • the one or more processors include the first communication processing unit 610 and the second communication processing unit 620. May be performed.
  • the program may be a program for causing the one or more processors to execute the operations of the first communication processing unit 610 and the second communication processing unit 620.
  • FIG. 15 is a block diagram illustrating an example of a schematic configuration of the terminal device 700 according to the second embodiment.
  • the terminal device 700 includes a reception processing unit 710 and a transmission processing unit 720.
  • reception processing unit 710 and the transmission processing unit 720 Specific operations of the reception processing unit 710 and the transmission processing unit 720 will be described later.
  • the reception processing unit 710 and the transmission processing unit 720 may be implemented by a baseband (BB) processor and / or another processor.
  • the reception processing unit 710 and the transmission processing unit 720 may be implemented by the same processor, or may be separately implemented by different processors.
  • the terminal device 700 may include a memory that stores a program and one or more processors that can execute the program.
  • the one or more processors operate the reception processing unit 710 and the transmission processing unit 720. May be.
  • the program may be a program for causing the one or more processors to execute the operations of the reception processing unit 710 and the transmission processing unit 720.
  • the base station 500 (first communication processing unit 510) transmits a reference signal using beam forming.
  • the terminal device 700 (reception processing unit 710) receives the reference signal.
  • the terminal device 700 transmits the first beam related information regarding the base station 500, which is the first beam related information regarding the beam, to the base station 600, and
  • the first communication processing unit 610) receives the first beam related information.
  • the base station 600 (second communication processing unit 620) transmits a handover message (for example, a handover request message) including second beam related information corresponding to the first beam related information to the base station 500, and Station 500 (second communication processing unit 520) receives the handover message.
  • a handover message for example, a handover request message
  • Station 500 receives the handover message.
  • the base station 500 (first communication processing unit 510) receives the access signal of the terminal device 700 based on the second beam related information.
  • Reference signal transmission, measurement report, handover message, beam-related information, access signal reception, and meaning of “transmit” For example, reference signal transmission, measurement report, handover message in the second embodiment, Explanations regarding beam-related information, access signal reception, and the meaning of “transmit” are the same as those in the first embodiment. Therefore, the overlapping description is omitted here, and only an example of a schematic process flow will be described.
  • FIG. 16 is a sequence diagram for explaining an example of a schematic process flow of the second embodiment.
  • the terminal device 700 transmits first beam-related information regarding the beam to the base station 600, and the base station 600 transmits the first beam-related information regarding the base station 500. Is received (S801).
  • the base station 600 transmits a handover message (eg, a handover request message) including second beam related information corresponding to the first beam related information to the base station 500, and the base station 500 transmits the handover message.
  • a handover message eg, a handover request message
  • the base station 600 transmits a handover message (eg, a handover request message) including second beam related information corresponding to the first beam related information to the base station 500, and the base station 500 transmits the handover message.
  • a handover message eg, a handover request message
  • the base station 500 receives the access signal of the terminal device 700 based on the second beam related information (S805).
  • the steps in the processing described in this specification do not necessarily have to be executed in time series in the order described in the sequence diagram.
  • the steps in the processing may be executed in an order different from the order described as the sequence diagram or may be executed in parallel.
  • some of the steps in the process may be deleted, and additional steps may be added to the process.
  • a device or a module thereof comprising the base station components (eg, the first communication processing unit and / or the second communication processing unit) described herein. May be.
  • a module eg, a baseband processor or other chip
  • the components eg, reception processing unit and / or transmission processing unit
  • a method including processing of the above-described components may be provided, and a program for causing a processor to execute the processing of the above-described components may be provided.
  • a recording medium non-transitory recording medium readable by a computer on which the program is recorded may be provided.
  • such an apparatus, module, method, program, and recording medium are also included in the present invention.
  • a first communication processing unit that transmits a reference signal using beamforming;
  • a second communication processing unit for receiving a handover message from a source base station for handover of the terminal device; With The handover message includes beam related information about the beam;
  • the first communication processing unit receives an access signal of the terminal device based on the beam related information. apparatus.
  • Appendix 2 The apparatus according to appendix 1, wherein the first communication processing unit receives the access signal using a set of beamforming weights corresponding to the beam related information.
  • Appendix 3 The apparatus according to appendix 1 or 2, wherein the access signal is an uplink signal in random access of the terminal apparatus.
  • Appendix 4 The apparatus according to any one of appendices 1 to 3, wherein the second communication processing unit transmits resource information indicating a radio resource for transmitting the access signal to the source base station.
  • Appendix 5 The apparatus according to appendix 4, wherein the radio resource is a radio resource for a set of beams or beamforming weights corresponding to the beam related information.
  • the second communication processing unit transmits a response message to the handover message to the source base station,
  • the response message includes the resource information.
  • the apparatus according to appendix 4 or 5.
  • Appendix 7 The apparatus according to any one of appendices 4 to 6, wherein the second communication processing unit transmits, to the source base station, retransmission cycle information indicating a retransmission cycle of the access signal together with the resource information.
  • Appendix 8 The apparatus according to any one of appendices 4 to 7, wherein the resource information is information transmitted from the source base station to the terminal apparatus.
  • Appendix 9 The apparatus according to any one of appendices 1 to 8, wherein the first communication processing unit transmits a reference signal using a plurality of beams.
  • Appendix 10 The apparatus according to appendix 9, wherein the first communication processing unit transmits a reference signal using the plurality of beams by using different radio resources for each beam.
  • Appendix 11 The apparatus according to appendix 10, wherein the radio resource is a frequency resource, a time resource, or a time frequency resource.
  • Appendix 12 The apparatus according to any one of appendices 1 to 11, wherein the beam related information is information related to one of a plurality of beams.
  • Appendix 13 The apparatus according to appendix 12, wherein the beam related information is information indicating one of the plurality of beams.
  • Appendix 14 The apparatus according to appendix 12 or 13, wherein the beam related information is information indicating one of a plurality of sets of beamforming weights.
  • Appendix 15 The apparatus according to any one of appendices 1 to 14, wherein the beam related information corresponds to beam related information transmitted from the terminal apparatus to the source base station.
  • Appendix 16 The apparatus according to any one of appendices 1 to 15, wherein the second communication processing unit transmits beamforming configuration information related to a beamforming configuration to the source base station.
  • Appendix 17 The apparatus according to appendix 16, wherein the beamforming configuration information includes information indicating the number of beams and information indicating a radio resource for each beam for transmitting a reference signal.
  • Appendix 18 The apparatus according to appendix 16 or 17, wherein the beamforming configuration information is information transmitted from the source base station to the terminal apparatus.
  • Appendix 19 The device according to any one of appendices 1 to 18, wherein the device is a base station, one or more devices of a plurality of devices constituting the base station, or a module for one of the devices. The device described.
  • a first communication processing unit that receives first beam related information on a base station that transmits a reference signal by using beamforming, the first beam processing information related to a beam from a terminal device;
  • a second communication processing unit for transmitting a handover message including second beam related information corresponding to the first beam related information to the base station;
  • the second beam related information is information used by the base station to receive an access signal of the terminal device. apparatus.
  • Appendix 21 The device according to appendix 20, wherein the first communication processing unit transmits resource information indicating a radio resource for transmitting the access signal to the terminal device.
  • Appendix 22 The apparatus according to appendix 21, wherein the first communication processing unit transmits, to the terminal apparatus, retransmission period information indicating a retransmission period of the access signal together with the resource information.
  • the first communication processing unit transmits a handover command message to the terminal device,
  • the handover command message includes the resource information,
  • Appendix 24 The apparatus according to any one of appendices 21 to 23, wherein the second communication processing unit receives the resource information from the base station.
  • Appendix 25 The apparatus according to any one of appendices 21 to 23, wherein the first communication processing unit generates the resource information.
  • Appendix 26 The apparatus according to any one of appendices 20 to 25, wherein the second beam related information is the same information as the first beam related information.
  • Appendix 27 The apparatus according to any one of appendices 20 to 26, wherein the first beam related information and the second beam related information are information related to one of a plurality of beams.
  • the first communication processing unit receives a measurement report transmitted from the terminal device, The measurement report includes the first beam related information;
  • the apparatus according to any one of appendices 20 to 27.
  • the second communication processing unit receives beamforming configuration information related to a beamforming configuration of the base station from the base station;
  • the first communication processing unit transmits the beamforming configuration information to the terminal device.
  • the device according to any one of appendices 20 to 28.
  • the first communication processing unit transmits a measurement configuration to the terminal device,
  • the measurement configuration includes the beamforming configuration information,
  • Appendix 31 The device according to any one of appendices 20 to 30, wherein the device is a base station, one or more devices of a plurality of devices constituting the base station, or a module for one of the devices. The device described.
  • a reception processing unit that receives a reference signal transmitted using beamforming by a first base station; Transmission processing unit that transmits first beam related information about the first base station to the second base station, the first beam related information about the beam; With The first beam related information corresponds to second beam related information used by the first base station to receive an access signal. apparatus.
  • the reception processing unit receives resource information indicating a radio resource for transmitting an access signal from the second base station, The transmission processing unit transmits an access signal to the first base station based on the resource information.
  • the device according to attachment 32 The device according to attachment 32.
  • the reception processing unit receives, from the second base station, retransmission period information indicating a retransmission period of an access signal together with the resource information, The transmission processing unit retransmits an access signal to the first base station based on the retransmission cycle information.
  • the device according to attachment 33 The device according to attachment 33.
  • the transmission processing unit transmits a measurement report to the second base station,
  • the measurement report includes the first beam related information;
  • the apparatus according to any one of appendices 32-34.
  • Appendix 36 36.
  • the reception processing unit receives beamforming configuration information related to a beamforming configuration of the first base station from the second base station, The reception processing unit receives a reference signal transmitted by beam forming by the first base station based on the beam forming configuration information.
  • the apparatus according to any one of appendices 32-36.
  • Appendix 38 The device according to any one of appendices 32-37, wherein the device is a terminal device or a module for the terminal device.
  • (Appendix 40) Receiving, from a terminal device, first beam related information on a beam, the first beam related information for a base station transmitting a reference signal using beamforming; Transmitting a handover message including second beam related information corresponding to the first beam related information to the base station; Including The second beam related information is information used by the base station to receive an access signal of the terminal device.
  • (Appendix 44) Receiving, from a terminal device, first beam related information on a beam, the first beam related information for a base station transmitting a reference signal using beamforming; Transmitting a handover message including second beam related information corresponding to the first beam related information to the base station; Is a program for causing a processor to execute The second beam related information is information used by the base station to receive an access signal of the terminal device. program.
  • (Appendix 45) Receiving a reference signal transmitted using beamforming by a first base station; Transmitting first beam related information about the beam to the second base station, the first beam related information about the first base station; Is a program for causing a processor to execute The first beam related information corresponds to second beam related information used by the first base station to receive an access signal. program.
  • (Appendix 46) Transmitting a reference signal using beamforming; Receiving a handover message including beam related information about the beam from the source base station of the handover of the terminal device; Receiving an access signal of the terminal device based on the beam related information;
  • (Appendix 48) Receiving a reference signal transmitted using beamforming by a first base station; Transmitting first beam related information about the beam to the second base station, the first beam related information about the first base station; Is a non-transitory recording medium readable by a computer recording a program for causing a processor to execute The first beam related information corresponds to second beam related information used by the first base station to receive an access signal.
  • Beam search period 100 100, 200, 500, 600 Base station 141, 241, 510, 610 First communication processing unit 143, 243, 520, 620 Second communication processing unit 300, 700 Terminal device 331, 710 Reception processing unit 333, 720 Transmission processing unit

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CN201780047632.5A CN109565731B (zh) 2016-08-03 2017-07-05 与波束成形有关的设备、方法、系统、程序和记录介质
EP23219836.6A EP4325735A3 (en) 2016-08-03 2017-07-05 Apparatus, method, system, program, and recording medium related to beamforming
CN202111332146.2A CN114142901B (zh) 2016-08-03 2017-07-05 终端设备、终端设备的方法和基站的方法
JP2018531783A JP6658891B2 (ja) 2016-08-03 2017-07-05 ビームフォーミングに関連する装置、方法、システム、プログラム及び記録媒体
US16/321,749 US10849027B2 (en) 2016-08-03 2017-07-05 Apparatus, method, system, program and recording medium related to beamforming
EP17836663.9A EP3496459A4 (en) 2016-08-03 2017-07-05 DEVICE, METHOD, SYSTEM, PROGRAM AND RECORDING MEDIUM IN CONNECTION WITH BEAM-FORMING
US17/077,238 US11516711B2 (en) 2016-08-03 2020-10-22 Apparatus, method, system, program and recording medium related to beamforming
US17/968,860 US20230040491A1 (en) 2016-08-03 2022-10-19 Apparatus, method, system, program and recording medium related to beamforming
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112204896A (zh) * 2018-06-01 2021-01-08 高通股份有限公司 经由多个经波束成形信道的经聚集时隙的传输

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG11201902859YA (en) * 2016-09-30 2019-05-30 Guangdong Oppo Mobile Telecommunications Corp Ltd Method for managing wave beam, terminal device and network device
US10601494B2 (en) * 2016-12-08 2020-03-24 At&T Intellectual Property I, L.P. Dual-band communication device and method for use therewith
US10257835B2 (en) * 2017-03-24 2019-04-09 At&T Intellectual Property I, L.P. Facilitating enhanced beam management in a wireless communication system
US10499376B2 (en) * 2017-06-16 2019-12-03 Kt Corporation Methods for managing resource based on open interface and apparatuses thereof
US10602418B2 (en) * 2018-06-11 2020-03-24 Google Llc Handover of a wireless connection based on uplink and downlink signal qualities
WO2020181087A1 (en) * 2019-03-07 2020-09-10 Commscope Technologies Llc Baseband controller for centralized radio access network (c-ran) implemented using hybrid virtualization architecture
WO2021022538A1 (en) * 2019-08-08 2021-02-11 Zte Corporation System and method for providing configuration information
US11362719B2 (en) * 2020-04-01 2022-06-14 Corning Research & Development Corporation Multi-level beam scheduling in a wireless communications circuit, particularly for a wireless communications system (WCS)
US11728875B2 (en) 2020-11-25 2023-08-15 Corning Research & Development Corporation Selective radio frequency (RF) reference beam radiation in a wireless communications system (WCS) based on user equipment (UE) locations
CN112583465B (zh) * 2021-01-11 2023-12-12 南京凯瑞得信息科技有限公司 一种卫星通信系统高可靠切换方法和系统
US12160267B2 (en) 2021-05-26 2024-12-03 Corning Research & Development Corporation Dynamic radio frequency (RF) beam pattern adaptation in a wireless communications system (WCS)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008501283A (ja) * 2004-06-15 2008-01-17 サムスン エレクトロニクス カンパニー リミテッド 広帯域無線接続通信システムにおけるソフトハンドオーバーを支援するためのシステム及び方法
JP2009273124A (ja) * 2008-05-05 2009-11-19 Ind Technol Res Inst アップリンク制御方法、基地局、移動局及び帯域幅要求方法
JP2014531852A (ja) * 2011-09-29 2014-11-27 サムスン エレクトロニクス カンパニー リミテッド ビームフォーミングを用いる無線通信システムにおける短いハンドオーバ遅延のための方法及び装置

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5588594B2 (ja) * 2007-12-26 2014-09-10 富士通株式会社 無線通信システムにおける通信方法並びに無線端末及び無線基地局
JP5354642B2 (ja) * 2008-04-09 2013-11-27 日本電気株式会社 無線通信システムおよびその通信方法
KR20100087821A (ko) * 2009-01-29 2010-08-06 엘지전자 주식회사 핸드오버 방법
EP2244502B1 (en) 2009-04-20 2011-06-08 Alcatel Lucent Handover method
US9049630B2 (en) * 2010-04-01 2015-06-02 Qualcomm Incorporated Facilitating baton handover in multi-carrier TD-SCDMA communications systems
JP5569427B2 (ja) * 2011-02-17 2014-08-13 富士通株式会社 基地局装置、端末装置、無線通信システム、およびハンドオーバ方法
CN102740385B (zh) * 2011-04-11 2016-08-10 华为技术有限公司 用于小区切换的方法和装置
US9585083B2 (en) 2011-06-17 2017-02-28 Samsung Electronics Co., Ltd. Apparatus and method for supporting network entry in a millimeter-wave mobile broadband communication system
KR20140054045A (ko) * 2011-07-14 2014-05-08 인터디지탈 패튼 홀딩스, 인크 Ｍ２ｍ 통신에 대한 레인징 전력 제어 방법 및 장치
CN102917375B (zh) * 2011-08-04 2014-12-24 华为技术有限公司 基于高级天线系统的通信方法和设备
CN103002526B (zh) 2011-09-13 2015-06-03 华为技术有限公司 小区切换的控制和测量方法、装置及系统
CN109890054B (zh) 2012-01-21 2023-12-15 华为技术有限公司 无线通信系统中测量增强的方法和装置
JP2014036317A (ja) * 2012-08-08 2014-02-24 Hitachi Ltd 無線通信システム及び無線通信制御方法
KR101957783B1 (ko) 2012-09-12 2019-03-13 삼성전자주식회사 무선 통신 시스템에서 핸드오버를 위한 장치 및 방법
KR20140072968A (ko) 2012-12-05 2014-06-16 한국전자통신연구원 이동 통신 시스템에서 다중 연결을 이용한 단말의 핸드오버 방법
US9468022B2 (en) * 2012-12-26 2016-10-11 Samsung Electronics Co., Ltd. Method and apparatus for random access in communication system with large number of antennas
JP2015164281A (ja) * 2014-01-31 2015-09-10 株式会社Ｎｔｔドコモ ユーザ装置、基地局、及び通信方法
CN103916918A (zh) * 2014-03-07 2014-07-09 北京交通大学 链状覆盖双链路移动通信系统及波束分集和接力切换方法
KR102169662B1 (ko) 2014-03-10 2020-10-23 삼성전자주식회사 무선 통신 시스템에서 빔 결정 장치 및 방법
PL3462798T3 (pl) * 2014-03-25 2022-04-04 Telefonaktiebolaget Lm Ericsson (Publ) System i sposób dla fizycznego dostępu losowego opartego na wiązce
CN105101307A (zh) * 2014-05-09 2015-11-25 中兴通讯股份有限公司 异质网中邻小区传输参数的配置方法、系统及相关设备
US10396873B2 (en) * 2014-09-24 2019-08-27 Mediatek Inc. Control signaling in a beamforming system
US10075888B2 (en) 2014-09-25 2018-09-11 Qualcomm Incorporated Service-specific air-interface selection
JP6386168B2 (ja) 2014-10-01 2018-09-05 インテル アイピー コーポレイション マクロセルにより支援されるスモールセルネットワークにおけるモバイル通信
MY192923A (en) 2014-10-08 2022-09-15 Ericsson Telefon Ab L M Mobility synchronization measurements
WO2016065590A1 (zh) 2014-10-30 2016-05-06 华为技术有限公司 小站间切换方法、设备及系统
US9668189B2 (en) 2014-11-14 2017-05-30 Industrial Technology Research Institute Handover management method and base station using the same
KR102233630B1 (ko) 2014-12-19 2021-03-30 한국전자통신연구원 이동통신 네트워크에서의 빔 스위칭 방법 및 장치
CN105792343B (zh) * 2014-12-23 2019-02-26 上海无线通信研究中心 无线通信系统中天线波束功率调整的干扰协调方法
CN105848222B (zh) * 2015-01-16 2021-05-28 北京三星通信技术研究有限公司 用于切换的方法和基站设备
JP2016152618A (ja) 2015-02-18 2016-08-22 渡辺　一成 無限軌道を搭載したラジコンの構造および制御方法
WO2016163786A1 (ko) * 2015-04-07 2016-10-13 삼성전자 주식회사 빔 포밍을 이용하는 무선 통신 시스템에서 핸드오버 방법 및 장치
CN105025579B (zh) * 2015-07-23 2018-08-14 京信通信系统（中国）有限公司 一种srs调度方法及装置
US10687255B2 (en) 2016-10-06 2020-06-16 Mitsubishi Electric Corporation Beam transmission/reception method, base station, terminal, and wireless communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008501283A (ja) * 2004-06-15 2008-01-17 サムスン エレクトロニクス カンパニー リミテッド 広帯域無線接続通信システムにおけるソフトハンドオーバーを支援するためのシステム及び方法
JP2009273124A (ja) * 2008-05-05 2009-11-19 Ind Technol Res Inst アップリンク制御方法、基地局、移動局及び帯域幅要求方法
JP2014531852A (ja) * 2011-09-29 2014-11-27 サムスン エレクトロニクス カンパニー リミテッド ビームフォーミングを用いる無線通信システムにおける短いハンドオーバ遅延のための方法及び装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Mobility type support in NR", 3GPP TSG-RAN WG2#95BIS R2-166875, October 2016 (2016-10-01), XP051151315, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg _ ran/WG 2-RL2/TSGR2-95bis/Docs/R2-166875.zip> *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112204896A (zh) * 2018-06-01 2021-01-08 高通股份有限公司 经由多个经波束成形信道的经聚集时隙的传输
CN112204896B (zh) * 2018-06-01 2022-08-12 高通股份有限公司 经由多个经波束成形信道的经聚集时隙的传输

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