Wireless communication system, control device, relay station device, and data transmission method determination method

Abstract

A wireless communication system comprising a relay station device that is capable of relaying wireless communication between one or more base station devices and a terminal device by using a plurality of systems, and a control device, wherein: the relay station device acquires, in relation to the terminal device and each of the base station devices for which the relay station device relays wireless communication, quality between said devices and the relay station device for each system, and notifies the control device regarding the acquired quality; and the control device determines, on the basis of the aforementioned quality and the degree of priority of the terminal device, a data transmission method for a communication path between each of the base station devices and the relay station device and for a communication path between the relay station device and the terminal device, and notifies the relay station device regarding the determined data transmission method.

Description

[Technical Field]

[0001] The present invention relates to a communication control technique in a network that accommodates a plurality of wireless systems. [Background technology]

[0002] Wireless communication technologies such as 5G and wireless LAN have become widespread. In recent years, as disclosed in Non-Patent Document 1, a technology has been proposed that predicts wireless quality in a terminal device and selects a wireless system (such as a base station device) to which the terminal device will connect from among multiple wireless systems.

[0003] The technology disclosed in Non-Patent Document 1 enables a terminal device to use multiple wireless systems across multiple networks, thereby maintaining communication quality in the terminal device and improving user experience. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] NTT Technical Journal (April 2020, P11-13) Summary of the Invention [Problem to be solved by the invention]

[0005] It is conceivable to perform detailed control of communication allocation from a base station device to a terminal device so that the terminal device can use an appropriate wireless system based on the technology disclosed in Non-Patent Document 1. However, since there are terminal devices that do not support such communication allocation control, it is difficult to use communication allocation control to make the terminal device use an appropriate wireless system.

[0006] The present invention has been made in consideration of the above points, and aims to provide a technology that enables a terminal device to communicate using an appropriate wireless system according to its capabilities, without performing allocation control for the terminal device. [Means for solving the problem]

[0007] According to the disclosed technology, there is provided a wireless communication system including a relay station device capable of relaying wireless communication between one or more base station devices and a terminal device using a plurality of systems, and a control device, the relay station device acquires quality between the relay station device and each base station device for which the relay station device performs relaying for each system, and notifies the control device of the acquired quality; The control device determines, based on the quality and the priority of the terminal device, a communication path between each base station device and the relay station device, and a communication path between the relay station device and the terminal device. Regarding Data transmission method redundant transmission, divided transmission, or selective transmission and notifies the relay station device of the determined data transmission method. A wireless communication system is provided. [Effects of the Invention]

[0008] According to the disclosed technology, it becomes possible for a terminal device to perform communication using an appropriate wireless system according to its capabilities, without performing allocation control for the terminal device. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of the overall configuration of a wireless communication system. [Figure 2] FIG. 1 is a diagram illustrating an example 1 of an apparatus configuration. [Figure 3] FIG. 1 is a diagram illustrating an example 1 of an apparatus configuration. [Figure 4] FIG. 10 is a diagram illustrating a second example of the device configuration. [Figure 5]FIG. 10 is a diagram illustrating a second example of the device configuration. [Figure 6] FIG. 10 is a diagram illustrating an image of the operation. [Figure 7] 10 is a flowchart of the operation. [Figure 8] FIG. 10 is a diagram illustrating an example of a table. [Figure 9] FIG. 2 illustrates an example of a hardware configuration of the apparatus. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention (the present embodiment) will be described with reference to the drawings. The embodiment described below is merely an example, and the embodiment to which the present invention is applied is not limited to the following embodiment. Note that the "base station device" described below may be replaced with "AP (access point)." Furthermore, the meaning of "base station device" may include AP.

[0011] (Example of overall system configuration) An example of the overall configuration of a wireless communication system according to this embodiment is shown in Fig. 1. As shown in Fig. 1, the wireless communication system includes one or more terminal devices 20, one or more relay station devices 10, one or more base station devices 30, and a control device 40.

[0012] In the example shown in FIG. 1, the control device 40 is provided on an upper NW (network) 50. However, the control device 40 may be provided anywhere. For example, the functions of the control device 40 may be provided in any of the terminal 20, the relay station device 10, and the base station device 30. Furthermore, any device having the functions of the control device 40 may be called a "control device."

[0013] Terminal device 20 is a device capable of wirelessly communicating with relay station device 10 or base station device 30, and is provided with an interface for a single wireless system or interfaces for multiple different wireless systems. Among the multiple terminal devices 20, there may be a mixture of terminal devices that connect to base station device 30 via relay station device 10 and terminal devices 20 that connect to base station device 30 directly.

[0014] Relay station device 10 relays communications between terminal device 20 and base station device 30. Relay station device 10 has interfaces for a plurality of different wireless systems. Relay station device 10 may also be called an accommodation allocation relay station device.

[0015] The base station device 30 transmits signals received wirelessly from the terminal device 20 to the upper NW 50, and transmits signals received from the upper NW 50 wirelessly to the terminal device 20. It is assumed that a plurality of different wireless systems are mixed among the plurality of base station devices 10. However, the plurality of base station devices 10 may be of only a single wireless system.

[0016] The term "wireless system" may also be referred to as a system, wireless communication method, wireless method, communication method, RAT (radio access technology), etc. Examples of "wireless systems" include 3G, 4G, 5G, 6G, wireless LAN, and WiMAX. In the following description, the term "wireless system" may be referred to as a "system."

[0017] The upper NW50 may be a core network of a mobile network (e.g., 5G), the Internet, or a network other than these.

[0018] The control device 40 performs allocation control (determining the transmission method), which will be described later. The control device 40 notifies the relay station device 10 of the determined transmission method. Also, instead of the control device 40 determining the transmission method, the relay station device 10 may determine the transmission method. Also, there may be a mixture of communications of terminal devices for which the control device 40 determines the transmission method and communications of terminal devices for which the relay station device 10 determines the transmission method.

[0019] The base station device 30 and the control device 40 are connected by wire. However, the base station device 30 and the control device 40 may be connected wirelessly. When using a wireless connection, IAB (Integrated Access Backhaul), WiGig, etc. may be used.

[0020] (Device configuration example 1) The configuration of each device in the above-described wireless communication system is shown in Fig. 2. Fig. 2 shows Example 1 in which relay station device 10 determines the transmission method. Fig. 3 shows the functional configuration of relay station device 10 in Example 1, excluding the wireless transceiver unit.

[0021] As shown in Fig. 2, relay station device 10 has a wireless transceiver unit 16 for each system. Also, as shown in Fig. 3, relay station device 10 has an information acquisition unit 11, a transmission method selection unit 12, a control unit 13, and a DB (database) 14. The "wireless transceiver unit" may also be called an "interface."

[0022] 2, the terminal device 20 has a radio transmission / reception unit 21 for each system. The base station device 30 has a radio transmission / reception unit 31 for each system.

[0023] In Example 1, the information acquisition unit 11 of the relay station device 10 acquires quality, capability information of the terminal device 20, priority of the terminal device 20 (or APP), etc., and the transmission method selection unit 12 determines the transmission method using this information. The control unit 13 executes the establishment of a communication path using the determined transmission method, etc.

[0024] FIG. 2 shows an example in which system A is selected as the communication method between the terminal device 20 and the relay station device 10, and system B is selected as the communication method between the relay device 10 and the base station device 30.

[0025] (Device configuration example 2) Fig. 4 shows Example 2 in which the control device 40 determines the transmission method. Fig. 5 shows the functional configuration of the relay station device 10 of Example 2, excluding the wireless transceiver unit, and the functional configuration of the control device 40.

[0026] As shown in Fig. 4, relay station device 10 has a radio transceiver unit 16 for each system. As shown in Fig. 5, relay station device 10 has an information acquisition unit 11, an information transmission unit 15, and a control unit 13. Control device 40 has an information acquisition unit 41, a transmission method selection unit 42, an information transmission unit 43, and a DB (database) 44.

[0027] 4, the terminal device 20 has a radio transmission / reception unit 21 for each system. The base station device 30 has a radio transmission / reception unit 31 for each system.

[0028] In Example 2, information acquisition unit 11 of relay station device 10 acquires the same information as in Example 1, and information transmission unit 15 transmits the information to control device 40. Transmission method selection unit 42 of control device 40 uses the information to determine the transmission method, and information transmission unit 43 transmits the determination result to relay station device 10. Control unit 13 of relay station device 10 establishes a communication path using the determined transmission method, etc.

[0029] (Example of operation) An example of the operation of the wireless communication system having the above-described configuration will be described below. Fig. 6 is a diagram showing an image of the operation. For example, when terminal device 20-1 compatible with both systems A and B issues a communication request, relay station device 10-1 that can establish communication with terminal device 20-1 determines (selects) a transmission method (which may also be called a data transmission method) for terminal device 20-1.

[0030] The transmission method here refers to a method (information) indicating which system to use and by what method to transmit for each of communication path 1 between "relay station device and base station device" and communication path 2 between "terminal device and relay station device." In addition, in this embodiment, the transmission method determined for each of communication path 1 and communication path 2 may be applied to two-way communication, or may be applied only to one-way communication. If it is applied only to one-way communication, a different transmission method may be applied to communication in the other direction.

[0031] Hereinafter, an example of operation of the configuration of Example 1 (FIGS. 2 and 3) will be described as Operation Example 1, and an example of operation of the configuration of Example 2 (FIGS. 4 and 5) will be described as Operation Example 2.

[0032] Note that when relay station device 10 relays a system that assumes synchronization, such as 5G cellular, relay station device 10 needs to be synchronized in advance with base station device 30 and terminal device 20. Therefore, when assuming a system that assumes synchronization, the following operation example assumes that relay station device 10 is synchronized in advance with base station device 30 and terminal device 20.

[0033] As a specific method of synchronization, for example, the synchronization between relay station device 10 and base station device 30 may be achieved by matching with a synchronization signal (PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)) from base station device 30, as in the initial access procedure of 5G New Radio. The synchronization signal may be periodically transmitted from base station device 30, and the clock of relay station device 10 may be updated each time the synchronization signal is received. Furthermore, synchronization between relay station device 10 and terminal device 20 may be achieved by each synchronizing with the synchronization signal of base station device 30, or by relay station device 10 periodically transmitting a synchronization signal and terminal device 20 updating its clock accordingly.

[0034] (Example 1) Operation example 1 will be described in accordance with the procedure of the flowchart in Fig. 7. Below, the operation for establishing communication with a certain terminal device 20 (target terminal device 20) will be described.

[0035] <s101> In S101, information acquisition unit 11 of relay station device 10 acquires the connection quality (which may also be called wireless quality, reception quality, etc.) between target terminal device 20 and relay station device 10, and the connection quality between relay station device 10 and base station device 30 that can establish communication with relay station device 10. The connection quality may be reception quality / reception power on the relay station device 10 side, or reception quality / reception power on the terminal device 20 side / base station device 30 side. When one device supports multiple systems, the connection quality for each system is acquired.

[0036] In 5G and other systems, the connection quality is measured using, for example, SS-RSRP (Synchronization Signal Reference Signal Received Power) or SINR (Signal-to-Interference-Plus-Noise Ratio). In wireless LAN, the connection quality is measured using, for example, RSSI (Received Signal Strength Indicator). SS-RSRP is the linear average power value of resource elements carrying secondary synchronization signals.

[0037] In addition, the information acquisition unit 11 may obtain the maximum throughput for each wireless system and communication path (relay station device-terminal device, relay station-base station, etc.) from a correspondence table (a correspondence table of received power and maximum throughput) obtained in advance, and may calculate the value obtained by dividing this proportionately by the number of connected devices as the predicted communication quality (throughput).

[0038] For example, in a path from relay station device 10A to terminal device 20A communicating in system A, it is assumed that 300 Mbps is obtained from the correspondence table as the maximum throughput from the received power at terminal device 20A. Furthermore, assuming that multiple terminal devices 20 communicating in system A are simultaneously connected to relay station device 10A, information acquisition unit 11 sets 150 Mbps as the predicted communication quality (throughput) for "relay station device 10A-terminal device 20A." Note that this predicted throughput may be the throughput from relay station device 10A to terminal device 20A, or may be the throughput from terminal device 20 to relay station device 10A, or may be a bidirectional throughput.

[0039] Furthermore, the information acquisition unit 11 may use a machine learning model to learn output throughput in advance using received power, the number of connected devices, etc. as input, and predict throughput using the learned model. Note that connection quality, reception quality, received power, communication quality, etc. may be collectively referred to as "quality."

[0040] For example, with regard to the connection quality with base station device 30, if there are "base station device 30-1, base station device 30-2" for each of system A and system B as devices that can establish communication with relay station device 10, information acquisition unit 11 acquires the connection quality (or communication quality) for each of system A ("between relay station device 10 and base station device 30-1" and "between relay station device 10 and base station device 30-2"), and also acquires the connection quality (or communication quality) for each of system B ("between relay station device 10 and base station device 30-1" and "between relay station device 10 and base station device 30-2").

[0041] In S101, the information acquisition unit 11 attempts to connect to the terminal device 20 in a wireless system compatible with the relay station device 10, thereby ascertaining the terminal capability (such as a system supported by the terminal device 20). The terminal capability may include a priority.

[0042] It is assumed that in S101, all information necessary for selecting a transmission method in S102 is acquired.

[0043] <s102> In S102, based on the connection quality acquired in S101 (or the calculated communication quality), the transmission method selection unit 12 of the relay station device 10 selects (determines) a data transmission method between the relay station device 10 and the terminal device 20, and a data transmission method between the relay station device 10 and the base station device 30. Details of the selection method will be described later.

[0044] <s103> In S103, the control unit 13 of the relay station device 10 establishes a communication path between the relay station device 10 and the terminal device 20, and establishes a communication path between the relay station device 10 and the base station device 30, in accordance with the selection result in S102, and starts communication using these communication paths.

[0045] (How to select the data transmission method) The following describes the process of selecting a data transmission method executed by the transmission method selection unit 12. The transmission method selection unit 12 selects one of redundant transmission, divided transmission, and selective transmission as the data transmission method based on the quality of the communication path, the terminal priority, the priority of the APP (application) being used by the terminal device 20, the required delay time, etc. However, the use of redundant transmission, divided transmission, and selective transmission is merely an example, and other transmission methods may also be used.

[0046] Redundant transmission is a method of transmitting signals redundantly over multiple communication paths. This method uses more wireless resources, but it is expected to improve reliability by increasing the possibility of maintaining a connection even in the event of sudden obstruction.

[0047] Divided transmission is a method of transmitting a signal over multiple communication paths, which can prevent the loss of all data due to sudden obstruction and is expected to provide a transmission similar to redundant transmission.

[0048] Selective transmission is a transmission method that selects a single communication path to transmit a signal. This transmission method allows you to select the communication quality to some extent depending on the communication path you select. The specific selection procedure is as follows:

[0049] <s1> First, the transmission method selection unit 12 selects, as communication path selection candidates, communication paths that satisfy a predetermined quality from among the communication paths for each system based on the quality acquired by the information acquisition unit 11. A communication path that satisfies the predetermined quality (quality standard) means, for example, that when the quality is SS-RSRP and the value of the predetermined quality is Q, the SS-RSRP of the communication path to be determined is Q or higher.

[0050] As an example, it is assumed that terminal device 20, relay station device 10, and base station device 30 can use systems A, B, and C, respectively, and that the following communication path qualities are obtained. Note that in this example, it is also possible for one base station device 30 to be able to use systems A, B, and C, or for multiple base station devices 30 to be able to use systems A, B, and C (e.g., when base station devices 30A, 30B, and 30C exist).

[0051] Communication path 1A: "relay station device 10-base station device 30" of system A Communication path 1B: "relay station device 10-base station device 30" of system B Communication path 1C: "relay station device 10-base station device 30" of system C Communication path 2A: "relay station device 10-terminal device 20" of system A Communication path 2B: "relay station device 10-terminal device 20" of system B Communication path 2C: "relay station device 10-terminal device 20" of system C Of the above, if communication path 1A, communication path 1B, communication path 2A, and communication path 2C each satisfy the quality standard (other paths do not satisfy the quality standard), the transmission method selection unit 12 selects communication path 1A, communication path 1B, communication path 2A, and communication path 2C as communication path candidates.

[0052] When there are multiple communication paths in one system, the one with the best quality may be selected, or multiple communication paths may be selected as candidates in one system.When multiple communication paths are selected as candidates in one system, the options for the transmission method described below may include a redundant configuration using multiple communication paths in one system.

[0053] <s2> Next, the transmission method selection unit 12 selects (determines) a data transmission method for the terminal device 20 based on the communication path candidate selected in S1, in accordance with the priority of the terminal device 20 or the priority of the application used by the terminal device 20. The specific processing is as follows. "The priority of the terminal device 20 or the priority of the application used by the terminal device 20" is referred to as "terminal (APP) priority." "Terminal priority" may also include the meaning of the priority of the application used by the terminal device 20.

[0054] Here, a table (a table associating the priority with the data transmission method) of the data transmission method to be preferentially used for each terminal (application) priority is prepared and stored in DB 14. Transmission method selection unit 12 refers to this table to determine the data transmission method.

[0055] An example of this table is shown in Figure 8. As shown in Figure 8, the "data transmission method" here refers to which system is used and which transmission method is used. The numbers in the table indicate the priority of use. For example, if the terminal (APP) priority is 1, "System A + System B redundant transmission", which has a priority of 1, will be used with the highest priority. If "System A + System B redundant transmission" is not available and "System A + System C redundant transmission", which has a priority of 2, is available, then "System A + System C redundant transmission" will be used.

[0056] The transmission method selection unit 12 selects a data transmission method for the target terminal device 20 by referring to the table in FIG. 8 based on the terminal (APP) priority of the target terminal device 20 and the communication path selection candidates selected in S1.

[0057] As described above, it is assumed that the following communication paths are selected as communication path selection candidates.

[0058] Communication path 1A: "relay station device 10-base station device 30" of system A Communication path 1B: "relay station device 10-base station device 30" of system B Communication path 2A: "relay station device 10-terminal device 20" of system A Communication path 2C: "relay station device 10-terminal device 20" of system C The data transmission method selected for each of the terminal (APP) priorities 1 to 4 of the target terminal device 20 is described below. Note that the transmission method selection unit 12 grasps the usage status of each transmission method, and for a transmission method that would exceed the capacity upper limit if selected, it may select a transmission method with one lower priority from among the available transmission methods.

[0059] Terminal (APP) Priority 1: The transmission method selection unit 12 selects "System A + System B redundant transmission" for communication path 1 of "relay station device 10 - base station device 30", and selects "System A + System C redundant transmission" for communication path 2 of "relay station device 10 - terminal device 20".

[0060] Terminal Priority 2: The transmission method selection unit 12 selects "System A + System B divided transmission" for communication path 1 of "relay station device 10 - base station device 30", and selects "System A selected transmission" for communication path 2 of "relay station device 10 - terminal device 20".

[0061] Terminal Priority 3: The transmission method selection unit 12 selects "System B selective transmission" for communication path 1 of "relay station device 10-base station device 30", and selects "System C selective transmission" for communication path 2 of "relay station device 10-terminal device 20".

[0062] Terminal Priority 4: The transmission method selection unit 12 selects "System B selective transmission" for communication path 1 of "relay station device 10-base station device 30", and selects "System C selective transmission" for communication path 2 of "relay station device 10-terminal device 20".

[0063] (Example 2) Next, an operation example 2 in the configuration of Example 2 (FIGS. 4 and 5) will be described. The basic processing flow is the same as in Operation Example 1, so Operation Example 2 will also be described with reference to the flowchart in FIG. 7, just like Operation Example 1. Furthermore, explanations of processes that are the same as those in Operation Example 1 will be omitted or only briefly explained.

[0064] <s101> In S101, the information acquisition unit 11 of the relay station device 10 acquires the connection quality (or communication quality) of each communication path, terminal capability, etc., as in the processing in Operation Example 1. The information transmission unit 15 of the relay station device 10 transmits the information acquired by the information acquisition unit 11 to the control device 40. The information acquisition unit 41 of the control device 40 acquires the information.

[0065] <s102> In S102, the transmission method selection unit 42 of the control device 40 selects a data transmission method between the relay station device 10 and the terminal device 20, and a data transmission method between the relay station device 10 and the base station device 30, based on the connection quality acquired in S101 (or the communication quality calculated). The control device 40 has a DB 44 that stores the table of Fig. 8, and the transmission method selection unit 42 of the control device 40 selects a data transmission method by referring to the DB 44. The process of selecting the data transmission method is the same as in Operation Example 1.

[0066] The information transmitting unit 43 of the control device 40 transmits the data transmission method selection result by the transmission method selecting unit 42 to the relay station device 10 that is the information transmission source. The information acquiring unit 11 of the relay station device 10 acquires the data transmission method selection result.

[0067] <s103> As in operation example 1, in S103, the control unit 13 of the relay station device 10 establishes a communication path between the relay station device 10 and the terminal device 20, establishes a communication path between the relay station device 10 and the base station device 30, and starts communication using these communication paths, in accordance with the selection result in S102.

[0068] (Example of hardware configuration) The terminal device 20, relay station device 10, base station device 30, and control device 40 can all be realized, for example, by causing a computer to execute a program. This computer may be a physical computer or a virtual machine on the cloud. Hereinafter, the "terminal device 20, relay station device 10, base station device 30, and control device 40" will be collectively referred to as "devices."

[0069] That is, the device can be realized by executing a program corresponding to the processing performed by the device using hardware resources such as a CPU and memory built into a computer. The program can be recorded on a computer-readable recording medium (such as a portable memory) and stored or distributed. The program can also be provided via a network such as the Internet or email.

[0070] Fig. 9 is a diagram showing an example of the hardware configuration of the computer. The computer in Fig. 9 includes a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, and the like, all of which are interconnected by a bus BS.

[0071] A program for realizing processing on the computer is provided by a recording medium 1001 such as a CD-ROM or a memory card. When the recording medium 1001 storing the program is set in the drive device 1000, the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000. However, the program does not necessarily have to be installed from the recording medium 1001, but may be downloaded from another computer via a network. The auxiliary storage device 1002 stores the installed program as well as necessary files, data, etc.

[0072] When an instruction to start a program is received, the memory device 1003 reads and stores the program from the auxiliary storage device 1002. The CPU 1004 implements the functions of the device in accordance with the program stored in the memory device 1003.

[0073] The interface device 1005 is used as an interface for connecting to a network or the like. The display device 1006 displays a GUI (Graphical User Interface) or the like according to a program. The input device 1007 is composed of a keyboard, mouse, buttons, a touch panel, or the like, and is used to input various operation instructions. The output device 1008 outputs the results of calculations. Note that any or all of the display device 1006, input device 1007, and output device 1008 may be omitted.

[0074] (Effects of the embodiment) As described above, the technology according to the present embodiment allows a terminal device to communicate using an appropriate wireless system according to its capabilities, without performing allocation control for the terminal device. In other words, cross-system wireless resource control can be performed according to the functions of the terminal device, without directly controlling the terminal device. This enables efficient and economical operation of a high-quality network that utilizes multiple wireless systems.

[0075] In addition, in the table of Figure 8, the order of the priority transmission methods used is switched or reversed between high-priority terminals (APP) and low-priority terminals (APP). In other words, when the terminal priority is low, resources of the quality-guaranteed system are not consumed. In other words, a data transmission method is selected so that a smaller amount of resources is used when the priority is low than when it is high.

[0076] In this way, by leaving as much of the quality-guaranteed system's resources capable of accommodating high-priority terminals (APPs) as possible without consuming them, it is possible to avoid quality degradation for high-priority terminals (APPs) due to bandwidth constraints.

[0077] (Addendum) This specification discloses at least the wireless communication system, control device, relay station device, and data transmission method determination method described in the following sections. (Additional note 1) A wireless communication system including a relay station device capable of relaying wireless communication between one or more base station devices and a terminal device using a plurality of systems, and a control device, the relay station device acquires quality between the relay station device and each base station device for which the relay station device performs relaying for each system, and notifies the control device of the acquired quality; The control device determines a data transmission method for each communication path between each base station device and the relay station device and a data transmission method for each communication path between the relay station device and the terminal device based on the quality and the priority of the terminal device, and notifies the relay station device of the determined data transmission method. Wireless communication system. (Additional note 2) The data transmission method is redundant transmission, divided transmission, or selective transmission. Item 1. A wireless communication system according to claim 1. (Additional note 3) The control device determines the data transmission method for each communication path by referring to a table that describes the relationship between priority and data transmission method. 3. The wireless communication system according to claim 1 or 2. (Additional note 4) When the priority of the terminal device is a first priority, the control device determines a data transmission method that uses a smaller amount of resources than the amount of resources used in a data transmission method determined for a second priority that is higher than the first priority. 4. A wireless communication system according to any one of claims 1 to 3. (Additional note 5) A control device in a wireless communication system including a relay station device capable of relaying wireless communication between one or more base station devices and a terminal device using a plurality of systems, and a control device, Memory and at least one processor coupled to said memory; Including, The processor: acquiring, from the relay station device, a quality of each system between the terminal device and each base station device that the relay station device relays; determining a data transmission method for each communication path between each base station device and the relay station device and a data transmission method for each communication path between the relay station device and the terminal device based on the quality and the priority of the terminal device; The determined data transmission method is notified to the relay station device. Control device. (Additional note 6) A relay station device capable of relaying wireless communications between one or more base station devices and a terminal device using a plurality of systems, Memory and at least one processor coupled to said memory; Including, The processor: acquiring, for each system, a quality between the terminal device and each base station device that the relay station device relays; Based on the quality and the priority of the terminal device, a data transmission method is determined for each communication path between each base station device and the relay station device, and for each communication path between the relay station device and the terminal device. A relay station device comprising: (Additional note 7) A method for determining a data transmission method in a wireless communication system including a relay station device capable of relaying wireless communication between one or more base station devices and a terminal device using a plurality of systems, and a control device, comprising: the relay station device acquires quality between the relay station device and each base station device for which the relay station device performs relaying for each system, and notifies the control device of the acquired quality; The control device determines a data transmission method for each communication path between each base station device and the relay station device and a data transmission method for each communication path between the relay station device and the terminal device based on the quality and the priority of the terminal device, and notifies the relay station device of the determined data transmission method. How to determine how data is sent.

[0078] Although the present embodiment has been described above, the present invention is not limited to such a specific embodiment, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. [Explanation of symbols]

[0079] 10. Relay station equipment 11 Information acquisition department 12 Transmission method selection section 13 Control Unit 14 DB 15 Information Transmission Unit 16 Radio transmitter / receiver 20 Terminal equipment 21 Radio transmitter / receiver 30 Base station equipment 31 Radio transmitter / receiver 40 Control device 41 Information Acquisition Department 42 Transmission method selection section 43 Information Transmission Department 44 DB Top 50 Networks 1000 Drive Device 1001 Recording media 1002 Auxiliary storage 1003 Memory device 1004 CPU 1005 Interface device 1006 Display device 1007 Input Device 1008 Output Device

Claims

1. A wireless communication system including a relay station device capable of relaying wireless communication between one or more base station devices and a terminal device using a plurality of systems, and a control device, the relay station device acquires quality between the relay station device and each base station device for which the relay station device performs relaying for each system, and notifies the control device of the acquired quality; The control device determines, based on the quality and the priority of the terminal device, redundant transmission, divided transmission, or selective transmission as a data transmission method for each communication path between each base station device and the relay station device and for each communication path between the relay station device and the terminal device, and notifies the relay station device of the determined data transmission method. Wireless communication system.

2. The control device determines the data transmission method for each communication path by referring to a table that describes the relationship between priority and data transmission method.

10. The wireless communication system of claim 1.

3. When the priority of the terminal device is a first priority, the control device determines a data transmission method that uses a smaller amount of resources than the amount of resources used in a data transmission method determined for a second priority that is higher than the first priority.

10. The wireless communication system of claim 1.

4. A control device in a wireless communication system including a relay station device capable of relaying wireless communication between one or more base station devices and a terminal device using a plurality of systems, and a control device, an information acquisition unit that acquires, from the relay station device, quality of each system between the terminal device and each base station device that the relay station device relays; a transmission method selection unit that determines redundant transmission, divided transmission, or selective transmission as a data transmission method for each communication path between each base station device and the relay station device and each communication path between the relay station device and the terminal device based on the quality and the priority of the terminal device; an information transmission unit that notifies the relay station device of the determined data transmission method; A control device comprising:

5. A relay station device capable of relaying wireless communications between one or more base station devices and a terminal device using a plurality of systems, an information acquisition unit that acquires, for each system, quality between the relay station device and each base station device that the relay station device relays; a transmission method selection unit that determines, based on the quality and the priority of the terminal device, redundant transmission, divided transmission, or selective transmission as a data transmission method for each of the communication paths between each base station device and the relay station device and the communication path between the relay station device and the terminal device; A relay station device comprising:

6. A method for determining a data transmission method in a wireless communication system including a relay station device capable of relaying wireless communication between one or more base station devices and a terminal device using a plurality of systems, and a control device, comprising: the relay station device acquires quality between the relay station device and each base station device for which the relay station device performs relaying for each system, and notifies the control device of the acquired quality; The control device determines, based on the quality and the priority of the terminal device, redundant transmission, divided transmission, or selective transmission as a data transmission method for each communication path between each base station device and the relay station device and for each communication path between the relay station device and the terminal device, and notifies the relay station device of the determined data transmission method. How to determine how data is sent.

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