WO2019146204A1 - Dispositif terminal, dispositif de relais, procédé de commande et programme - Google Patents

Dispositif terminal, dispositif de relais, procédé de commande et programme Download PDF

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Publication number
WO2019146204A1
WO2019146204A1 PCT/JP2018/040706 JP2018040706W WO2019146204A1 WO 2019146204 A1 WO2019146204 A1 WO 2019146204A1 JP 2018040706 W JP2018040706 W JP 2018040706W WO 2019146204 A1 WO2019146204 A1 WO 2019146204A1
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WO
WIPO (PCT)
Prior art keywords
base station
relay
station apparatus
connection
communication
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PCT/JP2018/040706
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English (en)
Japanese (ja)
Inventor
幸一郎 北川
宏之 新保
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株式会社Ｋｄｄｉ総合研究所
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Publication of WO2019146204A1 publication Critical patent/WO2019146204A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • 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
    • H04W16/32—Hierarchical cell structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a terminal device, a relay device, a control method, and a program, and more particularly to communication control technology when the terminal device communicates with a plurality of base station devices.
  • Non-Patent Document 1 in 3GPP (3rd Generation Partnership Project), a terminal apparatus communicates with a first base station apparatus and a second under the control of the first base station apparatus. Techniques for performing communication with a base station apparatus in parallel are standardized. Such parallel communication is called dual connectivity. Non-Patent Document 1 further stipulates that a relay apparatus (for example, a terminal apparatus) relays communication between a base station apparatus and a terminal apparatus.
  • a relay apparatus for example, a terminal apparatus
  • relay communication In Dual Connectivity, it is assumed that relay communication is used. That is, the terminal device performs communication with the first base station device and communication with the relay device connected to the second base station device under control of the first base station device in parallel. sell. In this configuration, it is conceivable that the terminal device switches the connection (performs handover) from the first relay device to the second relay device. When connection switching is performed, it is necessary to transfer data, which should have been transmitted by the first relay device, to the second relay device. For example, as shown in FIG. 1, the terminal device 101 is connected to the first base station device 102 and connected to the second base station device 103 via the first relay device 104 (for example, another terminal device). It shall be done.
  • the terminal device 101 is connected to the first base station device 102 and connected to the second base station device 103 via the first relay device 104 (for example, another terminal device). It shall be done.
  • the terminal device 101 maintains the connection with the first base station device 102, while the connection with the second base station device 103 via the first relay device 104 is the second relay device. It is possible to switch to the connection with the third base station apparatus 111 via 112. In this case, it is necessary to transfer data to be transmitted to the terminal device 101 from the first base station apparatus 102 or the second base station apparatus 103 to the third base station apparatus 111.
  • the terminal device 101 may exist outside the range of the cell formed by the third base station device 111, and in this case, the cell and the third cell formed by the first base station device 102 may be used.
  • the first base station apparatus 102 does not establish a communication link with the third base station apparatus 111.
  • the second base station apparatus 103 does not establish a communication link with the third base station apparatus 111.
  • the present invention provides a technique for facilitating data transfer at the time of connection switching when relay communication is used when a terminal device performs a plurality of wireless links.
  • a terminal device is a terminal capable of performing radio communication in parallel with a plurality of base station devices under control of a first base station device of the plurality of base station devices.
  • An apparatus wherein, while communication between the first base station apparatus and the second base station apparatus among the plurality of base station apparatuses is being executed in parallel, the second base A relay device that is a switching candidate for connection from a station device and notified from the base station device to which the relay device is connected to the relay device from the relay device capable of relaying communication with the base station device
  • the second base station apparatus is the base station apparatus to be measured
  • a control means for controlling so as not to permit the establishment of a connection with the relay device when the rare absence.
  • a terminal device performs wireless communication in parallel with a plurality of base station devices under the control of a first base station device of the plurality of base station devices.
  • a terminal device capable of performing communication between the first base station device and the second base station device among the plurality of base station devices in parallel; Reception of information on a base station apparatus to which the relay apparatus is connected from a relay apparatus that is a relay apparatus that is a switching candidate for connection from the second base station apparatus and that can relay communication with the base station apparatus To the base station apparatus to be measured notified of from the second base station apparatus to another apparatus relaying communication with the terminal apparatus or the second base station apparatus; Of the connection with the relay apparatus when the base station apparatus to which the Control means for permitting the establishment and not controlling the establishment of the connection with the relay device when the base station device to be measured does not include the base station device connected to the relay device; Have.
  • a relay device is a relay device capable of relaying communication between a base station device and a terminal device, and from the base station device to which the relay device is connected, It has a receiving means which receives the information of the base station apparatus of the measurement object of the radio
  • the present invention it is possible to facilitate data transfer at the time of connection switching in the case of using relay communication when the terminal device performs a plurality of wireless links.
  • the radio communication system according to the present embodiment has a configuration as shown in FIG. 1 as one aspect. Then, while maintaining the connection with the first base station apparatus 102, the terminal apparatus 101 can connect the second relay apparatus 112 with the second base station apparatus 103 via the first relay apparatus 104. It is assumed that switching is made to connection with the third base station apparatus 111 via the connection.
  • the terminal device 101 controls whether or not to switch the connection.
  • each base station device is connected to the adjacent base station (adjacent cell list) (adjacent cell list).
  • the information of the cell is notified as a base station apparatus of the wireless quality measurement target.
  • the information of the base station may be, for example, an identifier of the base station or an identifier of a cell formed by the base station.
  • the terminal device 101 acquires the information of the measurement target base station device notified from the third base station device 111 to the second relay device 112, and the information of the second base station device 103 currently connected is It is determined whether it is included in the base station apparatus to be measured. That is, since the base station apparatus that the third base station apparatus 111 treats as an adjacent base station is the target of measurement of the wireless quality by the second relay apparatus 112, the terminal apparatus 101 performs the second relay Whether the third base station apparatus 111 and the second base station apparatus 103 are in an adjacent relationship by determining whether the second base station apparatus 103 is included in the base station apparatus to be measured by the apparatus 112 Determine Similarly, the terminal device 101 determines whether the first base station device 102 is included in the base station device to be measured by the second relay device 112, thereby the third base station device 111 and the third base station device 111 are It is possible to determine whether one base station apparatus 102 is in an adjacent relationship.
  • the terminal apparatus 101 when the first base station apparatus 102 manages a data path related to transmission of data from the second base station apparatus 103 to the terminal apparatus 101, the terminal apparatus 101 performs the third process. It is determined whether the base station apparatus 111 and the first base station apparatus 102 are in an adjacent relationship, and if the first base station apparatus 102 does not manage the data path, the third base station apparatus 111 is determined. And the second base station apparatus 103 can be determined to be adjacent to each other.
  • the terminal device 101 acquires the information of the measurement target base station device notified from the second base station device 103 to the first relay device 104, and the information of the second relay device 112 which is a connection switching candidate. May be determined to be included in the measurement target base station apparatus.
  • the terminal apparatus 101 performs the first relay Whether the second base station apparatus 103 and the third base station apparatus 111 are in an adjacent relationship by determining whether the third base station apparatus 111 is included in the base station apparatus to be measured by the apparatus 104 Determine Similarly, the terminal device 101 determines whether the third base station device 111 is included in the base station device to be measured notified from the first base station device 102 to the terminal device 101. It can be determined whether one base station apparatus 102 and the third base station apparatus 111 are in an adjacent relationship.
  • the third base station device Control is performed so as not to allow switching of the connection to the second relay device 112 connected to 111.
  • the terminal device 101 determines that the third base station device 111 and the first base station device 102 or the second base station device 103 are in an adjacent relationship, the third base station device Control is performed to allow switching of the connection to the second relay device 112 connected to 111.
  • the terminal device 101 is connected to a base station device (the base station device that is not adjacent to the current connection destination base station device (the first base station device 102 or the second base station device 103) Switching of connection to the relay device) is not performed.
  • the base station apparatus of the current connection destination can not transfer the transmission target data to the terminal apparatus 101, or the transfer of the transmission target data takes a very long time to another base station apparatus. Can be prevented from connecting.
  • the base station apparatus has a configuration of a general base station apparatus, and it is sufficient to execute the processing of the conventional base station apparatus, and thus detailed description thereof will be omitted.
  • FIG. 2 shows an example of the hardware configuration of the terminal device and the relay device.
  • Each device in one example, has a hardware configuration as shown in FIG. 2, and includes, for example, a CPU 201, a ROM 202, a RAM 203, an external storage device 204, and a communication device 205.
  • a program for realizing each function of each device as described above, which is recorded in any of the ROM 202, the RAM 203, and the external storage device 204, is executed by the CPU 201.
  • each device controls the communication device 205 by, for example, the CPU 201 to communicate with other devices.
  • the communication device 205 of the terminal device and the relay device may be the fourth generation LTE or the fifth generation NR with the base station device or another device (for example, the relay device for the terminal device, the terminal device for the relay device).
  • Wireless communication based on the communication standard such as
  • the terminal device may have a plurality of communication devices, and two connections by Dual Connectivity may be performed using separate communication devices.
  • the relay device may have two communication devices for communication with the terminal device and communication with the base station device.
  • Each device may be provided with dedicated hardware for executing each function, or a part of the device may be executed by hardware, and the other part may be executed by a computer that operates a program. Also, all functions may be performed by a computer and a program.
  • the relay apparatus may be an apparatus dedicated to relay between the base station apparatus and the terminal apparatus, or, for example, the terminal apparatus may operate as the relay apparatus.
  • FIG. 3 shows an example of the functional configuration of the terminal device 101 according to the present embodiment.
  • the terminal device 101 includes a communication unit 301, a switching candidate information acquisition unit 302, a switching determination unit 303, and a switching control unit 304 as an example of the functional configuration.
  • the terminal device 101 has the other function which a general terminal device has, in order to simplify description here, it has abbreviate
  • the communication unit 301 establishes a plurality of wireless connections by at least Dual Connectivity, and performs communication on a plurality of wireless links in parallel.
  • the communication unit 301 establishes a connection with the first base station apparatus 102, and based on the control communication performed with the first base station apparatus 102, with the second base station apparatus 103. The connection between them is established via the first relay device 104.
  • the communication unit 301 is the information (base station apparatus identifier or information of the base station apparatus) of the connected base station apparatus (the first base station apparatus 102 and the second base station apparatus 103) according to a general cellular communication procedure. Get the identifier of the cell formed by the device).
  • the communication unit 301 is, for example, a base station apparatus registered from the first base station apparatus 102 in the base station apparatus to be measured (the adjacent base station list (adjacent cell list) of the first base station apparatus 102). Or, the information on the cell) can be acquired as the information on the base station apparatus adjacent to the first base station apparatus 102. Further, the communication unit 301 is registered from the first relay apparatus 104 in the base station apparatus (the adjacent base station list (adjacent cell list) of the second base station apparatus 103) to be measured by the first relay apparatus 104. Information on a certain base station apparatus or cell) can be acquired as information on a base station apparatus adjacent to the second base station apparatus 103. The communication unit 301 may obtain this information directly from the second base station apparatus 103.
  • the switching candidate information acquisition unit 302 acquires information of switching destination candidates of the currently established connection (for example, the second relay apparatus 112 and the third base station apparatus 111). In one example, the switching candidate information acquisition unit 302 acquires, using the communication unit 301, information of base station apparatuses registered as adjacent in the base station apparatus from the connection switching destination candidate base station apparatuses. . Also, the switching candidate information acquisition unit 302 is a base station apparatus registered from the relay apparatus of the connection switching destination candidate using the communication unit 301 as being adjacent in the base station apparatus to which the relay apparatus is connected.
  • the switching candidate information acquisition unit 302 is a base station device that is a measurement target of the wireless quality designated by the third base station device 111 directly from the third base station device 111 or via the second relay device 112. (For example, an identifier of a base station apparatus or an identifier of a cell formed by the base station apparatus).
  • the base station to be measured specified by the third base station 111 corresponds to the adjacent base station of the third base station 111.
  • the switching candidate information acquisition unit 302 acquires information on the base station apparatus from the connection switching destination candidate base station apparatus or from the base station apparatus connected to the base station apparatus. For example, the switching candidate information acquisition unit 302 may use the identifier of the third base station apparatus 111 from the third base station apparatus 111 or the second relay apparatus 112 connected to the third base station apparatus 111. And information on the identifier of the cell formed by the third base station apparatus 111.
  • the switching determination unit 303 allows switching of the connection to the switching destination candidate based on the switching destination candidate information acquired by the switching candidate information acquisition unit 302 and the information of the currently connected base station apparatus. It is determined whether or not.
  • the switching determination unit 303 uses the information on the measurement target base station device as:
  • the connection with the first relay apparatus 104 can be performed using the third base station apparatus 111 or the second relay. It is determined that switching to the connection with the device 112 is permitted.
  • the switching determination unit 303 performs the third base station connection with the first relay apparatus 104. It is determined that switching to the connection with the device 111 or the second relay device 112 is not permitted.
  • the switching determination unit 303 uses the information on the measurement target base station device. Switching the connection with the first relay device 104 to the connection with the third base station device 111 or the second relay device 112 depending on whether the information of the first base station device 102 is included or not. It can be determined whether to allow or not.
  • the switching determination unit 303 is designated by the second base station apparatus 103 acquired from the first relay apparatus 104.
  • the connection with the first relay apparatus 104 can be performed using the third base station It is determined that switching to connection with the device 111 or the second relay device 112 is permitted.
  • the switching determination unit 303 establishes connection with the first relay apparatus 104.
  • the switching determination unit 303 sets the information of the measurement target base station apparatus specified by the first base station apparatus 102. Switch the connection with the first relay device 104 to the connection with the third base station device 111 or the second relay device 112 depending on whether the information of the third base station device 111 is included or not. It can be determined whether to allow or not.
  • whether the switching determination unit 303 makes the above determination based on which information of the first base station apparatus 102 and the second base station apparatus 103 is, for example, when transmitting data to the terminal apparatus 101. It can be determined depending on whether the first base station apparatus 102 manages a data path indicating a transmission path. For example, when the first base station apparatus 102 manages a data path, the switching determination unit 303 can perform the above-described determination based on the information of the first base station apparatus 102. On the other hand, when the second base station apparatus 103, the third base station apparatus 111, or the higher order apparatus manages the data path, the switching determination unit 303 determines the information based on the information of the second base station apparatus 103. The above determination can be made.
  • the switching control unit 304 determines that the switching determination unit 303 permits connection switching
  • the connection with the first relay device 104 established by the communication unit 301 can be performed using the third base station apparatus 111 or the third base station apparatus 111.
  • a switching process to switch to the connection with the second relay device 112 is executed.
  • the terminal device 101 may be directly connected to the second base station device 103. That is, a configuration in which the terminal device 101 can receive information for determining whether the first base station device 102 or the second base station device 103 and the third base station device 111 are in an adjacent relationship. If it is, the terminal device 101 may be changed from the above-mentioned configuration as long as it is.
  • FIG. 4 shows an example of the functional configuration of the relay apparatus (the first relay apparatus 104 and the second relay apparatus 112) according to this embodiment.
  • the relay device includes, in one example, a relay communication unit 401 and a base station information transmission unit 402.
  • the relay device may be realized by a terminal device, and in this case, the terminal device can have both the functions of FIG. 3 and FIG. 4.
  • the relay device may be a fixed or mobile relay device.
  • the relay apparatus has other functions that a general communication apparatus has, but such functions are omitted here for the sake of simplicity.
  • the relay communication unit 401 performs communication for relaying at least wireless communication between the base station apparatus (the second base station apparatus 103 and the third base station apparatus 111) and the terminal apparatus 101.
  • the relay communication unit 401 is assumed to be capable of relaying communication between devices by, for example, regenerative relay (and in some cases non-regenerative relay).
  • the base station information transmission unit 402 transmits the information of the connected base station apparatus, the information of the measurement target base station apparatus specified by the base station apparatus, and the like to the terminal apparatus 101 via the relay communication unit 401.
  • the base station information transmission unit 402 of the first relay device 104 sends the information (the identifier of the base station device or the identifier of the cell formed by the base station device) of the second base station device 103 to the terminal device 101.
  • the base station information transmission unit 402 of the second relay apparatus 112 sends the information of the third base station apparatus 111 (the identifier of the base station apparatus or the identifier of the cell formed by the base station apparatus) to the terminal apparatus 101. It can notify.
  • the base station information transmission unit 402 of the first relay device 104 is the measurement target of the wireless quality notified from the second base station device 103 to the first relay device 104 (or the terminal device 101). The information on the base station apparatus is notified to the terminal apparatus 101.
  • the base station information transmission unit 402 of the second relay apparatus 112 receives information on the wireless quality measurement target base station apparatus notified from the third base station apparatus 111 to the second relay apparatus 112. Can be notified to the terminal device 101.
  • the base station information transmission unit 402 uses, for example, the connection to the connected terminal apparatus, information of the connected base station apparatus and the measurement target base designated by the base station apparatus. Notify station equipment.
  • the base station information transmission unit 402 transmits, for example, such information as a signal that can be received by a terminal apparatus that has not established a connection, such as a synchronization signal or a broadcast signal, to the terminal apparatus that is not connected. sell.
  • FIG. 5 shows a first example of the flow of processing performed in the wireless communication system.
  • the terminal device 101 establishes a connection with the second base station device 103 via the first relay device 104 under the control of the first base station device 102 (S501). .
  • the first relay apparatus 104 notifies the terminal apparatus 101 of the information of the second base station apparatus 103 to which the first relay apparatus 104 is connected (S502).
  • the terminal device 101 performs data communication with the second base station device 103 via the first relay device 104 (S503).
  • the first relay apparatus 104 holds, for example, the information of the second base station apparatus 103 in advance, and notifies the terminal apparatus 101 of the information of the second base station apparatus 103 during connection establishment processing.
  • the terminal device 101 may establish a direct connection with the second base station device 103 without passing through the relay device.
  • Information of the second base station apparatus 103 is acquired by a signal or data communication which is separately transmitted after that.
  • the terminal apparatus 101 is connected with the second base station apparatus 103 (regardless of whether or not the first relay apparatus 104 is used). Can be established and data communication can be performed with the second base station apparatus 103.
  • Data to be transmitted to the terminal device 101 may be transmitted from the first base station apparatus 102 to the second base station apparatus 103 (via an inter-base station communication link such as X2 or Xn) (for example, It may be transmitted to the second base station apparatus 103 without passing through the first base station apparatus 102 from a higher order apparatus or the like.
  • a path indicating a data transmission path at this time is called a data path, and when the data path passes through the first base station apparatus 102, the first base station apparatus 102 can be a node that performs data path management.
  • the second base station apparatus 103, the third base station apparatus 111, the higher order apparatus and the like can be nodes that perform data path management.
  • the terminal apparatus 101 may not obtain the information of the second base station apparatus 103, and instead, the first base station apparatus 102 may The information of the base station apparatus 102 can be acquired. That is, the terminal device 101 may perform the process of S502 only when the first base station apparatus 102 does not manage the data path.
  • the terminal device 101 moves to deteriorate the wireless environment with the first relay device 104, and at the same time, reaches a position where the wireless signal from the second relay device 112 can be received sufficiently strongly. It shall be.
  • the second relay apparatus 112 receives a measurement instruction of wireless quality from the third base station apparatus 111 (S 504), and based on the measurement instruction, the adjacent base station in the third base station apparatus 111 The radio quality is measured for the base station apparatus registered as a station.
  • the second relay apparatus 112 notifies the third base station apparatus 111 of the measurement result of the wireless quality (S506).
  • the second relay device 112 periodically transmits, for example, a broadcast signal or a synchronization signal, information on a base station device registered as an adjacent base station in the third base station device 111 designated by the measurement instruction.
  • the terminal device 101 can receive the notification signal and the synchronization signal in response to the situation where the wireless signal from the second relay device 112 can be received sufficiently strongly. Then, the terminal device 101 acquires, from the received signal, the information of the base station device registered as the adjacent base station in the third base station device 111, and in the information, the current connection acquired in S502 is established. It is determined whether the information of the second base station apparatus 103 in the inside is included.
  • the terminal device 101 determines whether to permit switching of the connection from the first relay device 104 (or the second base station device 103) to the second relay device 112 according to the determination result ( S507). For example, when the second base station apparatus 103 is included in a base station apparatus registered as an adjacent base station in the third base station apparatus 111, the terminal apparatus 101 determines to allow connection switching. That is, when the second base station apparatus 103 and the third base station apparatus 111 are in an adjacent relationship, switching of the connection from the first relay apparatus 104 to the second relay apparatus 112 is permitted. On the other hand, when the second base station apparatus 103 is not included in the base station apparatus registered as the adjacent base station in the third base station apparatus 111, the terminal apparatus 101 determines that the connection switching is not permitted. . Thereby, the communication link between the base stations is established, and the connection is switched when the target data to the terminal device 101 can be transferred at high speed from the switching source base station device to the switching destination candidate base station device. Will be done.
  • FIG. 6 shows a second example of the flow of processing performed in the wireless communication system. Also in this example, it is assumed that the terminal device 101 is connected and in communication with the second base station device 103 via the first relay device 104 under the control of the first base station device 102. S601, S602). Then, in the terminal device 101, the first relay device 112 specified by the second base station device 103 to which the first relay device 104 is connected measures the radio quality from the first relay device 104. The information of the base station apparatus to be obtained is acquired (S603). Here, it should be noted that not the information of the second base station apparatus 103 but the information of the base station apparatus to be measured is acquired.
  • the second relay apparatus 112 also establishes a connection with the third base station apparatus 111 (S604).
  • the second relay apparatus 112 sends out the information of the third base station apparatus 111 by, for example, a broadcast signal or a synchronization signal (S605).
  • the terminal device 101 can receive this signal in response to a situation in which the wireless signal from the first relay device 112 can be received sufficiently strongly.
  • the information of the third base station device 111 acquired from the second relay device 112 is included in the information of the base station device whose wireless quality is to be measured by the first relay device 104. Determine if it is included.
  • the terminal device 101 determines whether to permit switching of the connection from the first relay device 104 (or the second base station device 103) to the second relay device 112 according to the determination result ( S606). For example, when the third base station apparatus 111 is included in a base station apparatus registered as an adjacent base station in the second base station apparatus 103, the terminal apparatus 101 determines to allow connection switching. That is, when the third base station apparatus 111 and the second base station apparatus 103 are in an adjacent relationship, switching of the connection from the first relay apparatus 104 to the second relay apparatus 112 is permitted. On the other hand, when the third base station apparatus 111 is not included in the base station apparatus registered as the adjacent base station in the second base station apparatus 103, the terminal apparatus 101 determines that the connection switching is not permitted. . Thereby, the communication link between the base stations is established, and the connection is switched when the target data to the terminal device 101 can be transferred at high speed from the switching source base station device to the switching destination candidate base station device. Will be done.
  • the second base When the first base station apparatus 102 executes the process described as being performed by the station apparatus 103 and the first relay apparatus 104, the same effect as the above-described process can be obtained. That is, whether or not the first base station apparatus 102 and the third base station apparatus 111 are adjacent to each other is determined based on the third base station apparatus to be measured designated by the first base station apparatus 102. It is determined by determining whether the station apparatus 111 is included or the first base station apparatus 102 is included in the measurement target base station apparatus specified by the third base station apparatus 111. . Then, the terminal device 101 transmits the first relay device 104 to the second relay device 112 according to whether or not the first base station device 102 and the third base station device 111 are in an adjacent relationship. It may be determined whether to allow connection switching.
  • the terminal device 101 is adjacent to any one of the base station devices to which the first relay device 104 is connected and any of the base station devices to which the second relay device 112 is connected. It may be determined that switching of the connection from one relay apparatus 104 to the second relay apparatus 112 is permitted.
  • the terminal device 101 is the first one when all of the base station devices to which the first relay device 104 is connected are adjacent to any of the base station devices to which the second relay device 112 is connected.
  • the terminal apparatus 101 is a partner apparatus that is permitted to switch the connection among these connection switching destination candidates, and the radio quality is the highest.
  • the connection destination may be switched by selecting a partner apparatus whose good or wireless quality meets a predetermined quality.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un dispositif terminal capable d'effectuer une communication sans fil simultanément avec une pluralité de dispositifs de station de base tout en étant sous le contrôle d'un premier dispositif de station de base parmi la pluralité de dispositifs de station de base, le dispositif terminal étant configuré de manière à : recevoir des informations sur un dispositif de station de base devant être mesuré par un dispositif de relais à partir d'un dispositif de relais qui est un candidat de commutation pour une connexion du deuxième dispositif de station de base, qui est capable de relayer la communication vers et depuis le dispositif de station de base, et qui a reçu une notification du dispositif de station de base auquel le dispositif de relais est connecté, pendant une période où la communication s'effectue parallèlement entre les premier et deuxième dispositifs de station de base parmi la pluralité des dispositifs de station de base; et commander de manière à permettre l'établissement d'une connexion avec le dispositif relais lorsque le deuxième dispositif de station de base est inclus parmi les dispositifs de station de base à mesurer, et de manière à ne pas permettre l'établissement d'une connexion avec le dispositif relais lorsque le deuxième dispositif de station de base ne fait pas partie des dispositifs de station de base à mesurer.
PCT/JP2018/040706 2018-01-29 2018-11-01 Dispositif terminal, dispositif de relais, procédé de commande et programme WO2019146204A1 (fr)

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JP2018012501A JP6879955B2 (ja) 2018-01-29 2018-01-29 端末装置、制御方法、及びプログラム
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