Wireless device and wireless communication system

Abstract

To provide a radio device and a radio communication system which have a redundant configuration by adding IP communication to narrow-band radio communication in which IP communication is not supported, and achieve highly reliable radio communication by using a plurality of lines of a non-IP line and an IP line.SOLUTION: The TCP / UDP unit 22 branches and inputs transmission information from the second layer unit 12 to the first layer unit 11, puts the transmission information into a body portion of TCP / UDP for IP communication and outputs the transmission information by IP communication, and acquires reception information from the body portion of TCP / UDP input by IP communication and outputs the reception information to the second layer unit 12, and the second layer unit 12 outputs the transmission information to the first layer unit 11 and branches and outputs the reception information to the TCP / UDP unit 22. In the radio equipment and the radio communication system, reception information from a first layer part 11 is inputted, reception information from a TCP / UDP part 22 is inputted, both pieces of reception information are compared and the reception information which is correctly received is selected.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a radio device, and more particularly to a radio device and a radio communication system that improves reliability by adapting narrowband radio communication that does not support IP (Internet Protocol) communication to IP communication. [Background technology]

[0002] [Prior Art] In narrowband wireless communications that do not support IP communications, such as those used in conventional business radio communications, when the line includes a narrowband digital communications method such as ARIB STD-T61 (SCPC / FDMA: Single Channel Per Carrier / Frequency Division Multiple Access), it is difficult to apply technology that makes the lines redundant and replicates the same data at the application level to send and receive using multiple lines in order to improve communication reliability.

[0003] This is because the ARIB STD-T61 wireless system has a TCH (Traffic Channel) portion that carries user data of only 256 bits (32 bytes), so it is not possible to carry the entire IP packet on the TCH portion.

[0004] When dividing an IP packet and sending it on a TCH, a typical 1500 byte (12000 bit) IP packet must be divided and sent 47 times, making it difficult to use ARIB STD-T61 for the line portion of an application using IP.

[0005] [ARIB STD-T61 physical communication channels: Figure 5] Specifically, the bit structure of the signal format in the physical communication channel (384 bits) of ARIB STD-T61 is shown in FIG. FIG. 5(a) shows the format of the upstream signal after synchronization is established, and (b) shows the format of the downstream signal after synchronization is established.

[0006] The TCH area (TCH portion) that carries application data such as voice and data is 256 bits (32 bytes). TCH and FACCH (Fast Associated Control Channel: high-speed ACCH) are shared, and the first 96 bits and the second 160 bits total 256 bits.

[0007] In Figure 5, "LP+R" indicates the preamble for the linearizer and the guard time for burst transient response, "P" indicates the preamble, "RI" indicates the radio information channel, "SW" indicates the synchronization word, "SACCH" indicates the slow associated control channel (ACCH), and "RCH" indicates the housekeeping channel.

[0008] In addition, in order to achieve redundancy, it is also possible to stream applications used in narrowband communication to the IP line side. This uses the steal function of the FACCH (Fast Associated Control Channel) of ARIB STD-T61 to temporarily steal the TCH area.

[0009] For example, if you use the steal function of FACCH, you can temporarily use the TCH area where voice is carried for data communication while you are in a group call on the TCH. For example, you can use FACCH to send the caller ID during a voice group call.

[0010] In this way, if a wireless system that includes FACCH attempts to adopt a redundant configuration by duplicating data at the application level, the TCH area can be temporarily used for data communication, but other data will be flowing on the wireless line, so it will not be a redundant configuration.

[0011] [Related Technology] Related prior art includes Japanese Patent Application Laid-Open No. 2017-126844 "Communication System" (Patent Document 1) and Japanese Patent Application Laid-Open No. 2008-258782 "Wireless Transceiver" (Patent Document 2).

[0012] Patent document 1 shows that when a communication system is configured with an IP communication network and a new device is added that imitates an old device and relays data to another old device, IP communication can be achieved without changing the IP address of the old device.

[0013] Patent Document 2 discloses a wireless transmitter / receiver that performs TCP / IP communication using full-duplex communication, thereby achieving high communication efficiency. [Prior art documents] [Patent documents]

[0014] [Patent Document 1] Japanese Patent Application Publication No. 2017-126844 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-258782 Summary of the Invention [Problem to be solved by the invention]

[0015] As described above, conventional narrowband wireless communication systems that do not support IP communication have had the problem that it is difficult to apply a redundant configuration and to improve the reliability of wireless communication.

[0016] Furthermore, Patent Documents 1 and 2 do not describe a configuration in which IP communication is added to a narrowband wireless communication radio device that does not support IP communication, thereby realizing wireless communication using multiple lines, including non-IP lines and IP lines.

[0017] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a radio device and a radio communication system that add IP communication to narrowband radio communication that does not support IP communication to create a redundant configuration, and that realizes highly reliable radio communication using multiple lines, including non-IP lines and IP lines. [Means for solving the problem]

[0018] The present invention, which solves the problems of the above-mentioned conventional examples, is a radio device for narrowband wireless communication that does not support IP communication, and comprises a first layer section corresponding to Layer 1 configured in accordance with the narrowband digital communication standard ARIB STD-T61, a second layer section corresponding to Layer 2, and, as IP communication means, a TCP / UDP section that branches and inputs transmission information from the second layer section to the first layer section, puts the information in a TCP / UDP body section for IP communication and outputs it via IP communication, and obtains reception information from the TCP / UDP body section input via IP communication and outputs it to the second layer section, wherein the second layer section outputs transmission information to the first layer section and also branches the information to output to the TCP / UDP section, inputs reception information from the first layer section and inputs reception information from the TCP / UDP section, compares both sets of reception information, and selects the reception information that has been correctly received.

[0019] The present invention is a narrowband wireless communication radio device that does not support IP communication, and comprises a first layer section corresponding to Layer 1 configured in accordance with the narrowband digital communication standard ARIB STD-T61, a second layer section corresponding to Layer 2, and, as IP communication means, a multi-path distribution and selection section that branches and inputs transmission information from the second layer section to the first layer section, puts the information in a TCP / UDP body section for IP communication, distributes the information to multiple paths of IP communication, and outputs the information, and also acquires reception information from the TCP / UDP body section input in the multiple-path IP communication, selects the reception information of one of the paths, and outputs it to the second layer section, and is characterized in that the second layer section outputs the transmission information to the first layer section, and also branches and outputs the information to the multiple path distribution and selection section, and inputs reception information from the first layer section and reception information from the multiple path distribution and selection section, and compares both sets of reception information to select the correctly received reception information.

[0020] The present invention is characterized in that in the radio device, a jitter absorption buffer with a 40 msec period is provided between the second layer section and the IP communication means.

[0021] The present invention is characterized in that in the wireless device, the second layer unit converts information into a JSON data format when putting information into the body portion of TCP / UDP.

[0022] The present invention is a wireless communication system having the above-mentioned radio equipment, characterized in that the second layer unit matches the timing of the start of a standard downstream frame with the start of a downstream frame of IP communication in order to keep the reception timing constant. [Effects of the Invention]

[0023] According to the present invention, a radio device is provided with a first layer section corresponding to Layer 1 configured in accordance with the narrowband digital communication standard ARIB STD-T61, a second layer section corresponding to Layer 2, and, as IP communication means, a TCP / UDP section that branches and inputs transmission information from the second layer section to the first layer section, puts the information in a TCP / UDP body section for IP communication and outputs it via IP communication, and acquires reception information from the TCP / UDP body section input via IP communication and outputs it to the second layer section, wherein the second layer section outputs transmission information to the first layer section and also branches and outputs the transmission information to the TCP / UDP section, inputs reception information from the first layer section and inputs reception information from the TCP / UDP section, compares both sets of reception information, and selects the reception information that has been correctly received. Therefore, it is possible to add IP communication to narrowband wireless communication that does not support IP communication to create a redundant configuration, and it has the effect of realizing highly reliable wireless communication using multiple lines, including non-IP communication lines and IP communication lines.

[0024] According to the present invention, the radio equipment includes a first layer section corresponding to Layer 1 configured in accordance with the narrowband digital communication standard ARIB STD-T61, a second layer section corresponding to Layer 2, and, as IP communication means, a multi-path distribution and selection section that branches and inputs transmission information from the second layer section to the first layer section, places it in a TCP / UDP body section for IP communication, distributes and outputs it to multiple paths of IP communication, and acquires reception information from the TCP / UDP body section input in the multiple-path IP communication, selects the reception information of one of the paths, and outputs it to the second layer section, and the second layer section outputs transmission information to the first layer section and also branches and outputs it to the multiple path distribution and selection section, inputs reception information from the first layer section and inputs reception information from the multiple path distribution and selection section, compares both sets of reception information, and selects the reception information that has been correctly received. Therefore, it is possible to add IP communication to narrowband wireless communication that does not support IP communication to create a redundant configuration, and it has the effect of realizing highly reliable wireless communication using multiple lines, including non-IP communication lines and IP communication lines. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 2 is a block diagram of the configuration of the radio device. [Figure 2] FIG. 1 is a schematic diagram of frame synchronization. [Figure 3] FIG. 10 is a schematic diagram of the process of a jitter absorption buffer. [Figure 4] FIG. 10 is a block diagram of another radio device. [Figure 5] This is a bit configuration diagram of the signal format of the physical communication channel of ARIB STD-T61. DETAILED DESCRIPTION OF THE INVENTION

[0026] An embodiment of the present invention will be described with reference to the drawings. [Outline of the embodiment] A radio device according to an embodiment of the present invention (this radio device) is a radio device for narrowband radio communication that does not support IP communication, and includes a first layer section corresponding to Layer 1 configured in accordance with the narrowband digital communication standard ARIB STD-T61, a second layer section corresponding to Layer 2, and, as IP communication means, a TCP / UDP section that branches and inputs transmission information from the second layer section to the first layer section, puts the information in a TCP / UDP body section for IP communication and outputs it via IP communication, and acquires reception information from the TCP / UDP body section input via IP communication and outputs it to the second layer section. The second layer section outputs transmission information to the first layer section and also branches and outputs the information to the TCP / UDP section, inputs reception information from the first layer section and inputs reception information from the TCP / UDP section, compares both pieces of reception information, and selects the reception information that has been correctly received. This radio device can add IP communication to narrowband radio communication that does not support IP communication to create a redundant configuration, and can achieve highly reliable radio communication using multiple lines, including non-IP communication lines and IP communication lines.

[0027] Another radio device according to an embodiment of the present invention (another radio device) is a radio device for narrowband wireless communication that does not support IP communication, and is compliant with the ARIB standard for narrowband digital communication. The system comprises a first layer section equivalent to Layer 1 configured by STD-T61, a second layer section equivalent to Layer 2, and, as an IP communication means, a multiple path distribution and selection section which branches and inputs transmission information from the second layer section to the first layer section, places it in the body part of TCP / UDP for IP communication, distributes it to multiple paths of IP communication, and outputs it, and also acquires reception information from the body part of TCP / UDP input in the multiple paths of IP communication, selects the reception information of one of the paths, and outputs it to the second layer section. The second layer section outputs transmission information to the first layer section, and also branches and outputs it to the multiple path distribution and selection section, and inputs reception information from the first layer section and inputs reception information from the multiple path distribution and selection section, compares both pieces of reception information, and selects the correctly received piece of reception information. This system can add IP communication to narrowband wireless communication that does not support IP communication to create a redundant configuration, and can achieve highly reliable wireless communication using multiple lines of non-IP communication lines and IP communication lines.

[0028] Furthermore, a wireless communication system (this system) according to an embodiment of the present invention is equipped with the above-mentioned radio device or another radio device, and can add IP communication to narrowband wireless communication that does not support IP communication, thereby realizing highly reliable wireless communication using multiple lines, including non-IP communication lines and IP communication lines.

[0029] ARIB STD-T61 is a standard that specifies the radio interface for commercial digital mobile communication systems, including public service systems, using the SCPC and FDMA methods among narrowband digital communication methods in the 150 MHz, 260 MHz, and 400 MHz bands.

[0030] In the SCPC (Single Carrier Per Channel) system, one wireless carrier corresponds to one wireless channel, and communication is carried out between a base station and a mobile station. Furthermore, the FDMA (Frequency Division Multiple Access) method is a multiple access method in which a frequency band is divided into a plurality of smaller bands and allocated to a plurality of communication subjects, thereby enabling simultaneous transmission of, for example, voice and data.

[0031] [This radio: Figure 1] This radio device will be described with reference to Fig. 1. Fig. 1 is a block diagram of the configuration of this radio device. As shown in FIG. 1, this radio device has a first layer section 11, a second layer section 12, a third layer section 13, an RT (Radio Transmission) radio management section 14, an MM (Mobility Management) mobility management section 15, a CC (Call Control) call control section 16, a jitter absorption buffer 21, a TCP / UDP section 22, an IP section 23, and a 5G wireless modem 24. Each of the above units is a functional block realized by software.

[0032] Here, the first layer unit 11, the second layer unit 12, the third layer unit 13, the RT radio management unit 14, the MM mobility management unit 15, and the CC call control unit 16 are functional blocks defined by the narrowband digital communication standard ARIB STD-T61, and correspond to non-IP communication circuits.

[0033] In addition, the jitter absorption buffer 21, the TCP / UDP unit 22, the IP unit 23, and the 5G wireless modem 24 correspond to an IP communication circuit. Although FIG. 1 shows 5G (fifth generation) IP communication, it may also be applied to 4G (fourth generation) IP communication.

[0034] [Parts of this radio] Each part of this radio will now be described in detail. [First Layer 11] The first layer unit 11 corresponds to the function of Layer 1 (physical layer) defined in ARIB STD-T61, and performs wireless communication at 150 MHz, 260 MHz or 400 MHz.

[0035] Layer 1 (physical layer) defines the physical transmission means of wireless communication, specifically, the radio wave transmission method, frequency band, modulation / demodulation method, transmission speed, etc., and provides the basic mechanism for wireless devices to send and receive signals. The first layer unit 11 inputs and outputs data and the like to and from the second layer unit 12, thereby realizing wireless communication.

[0036] [Second Layer 12] The second layer unit 12 corresponds to the function of Layer 2 (data link layer) defined in ARIB STD-T61, and identifies the communication partner by address (device number) and performs retransmission control and the like.

[0037] Layer 2 (Data Link Layer) divides the bit stream transmitted by the physical layer into frames, performs error detection and flow control, and identifies the communication partner using MAC addresses. The Data Link Layer is important for improving the reliability of wireless communication. The second layer section 12 inputs and outputs data and the like to and from the first layer section 11, the jitter absorption buffer 21, or the third layer section 13.

[0038] Specifically, the second layer section 12 outputs data from the third layer section 13 to the first layer section 11 for non-IP communication and also outputs the data to the jitter absorption buffer 21 for IP communication. In addition, the second layer unit 12 inputs non-IP communication data from the first layer unit 11 and IP communication data from the jitter absorption buffer 21, compares the two data, selects the appropriate data, and outputs it to the third layer unit 13.

[0039] [Third Layer 13] The third layer unit 13 corresponds to the function of layer 3 (network layer) defined in ARIB STD-T61, and realizes a sharing mechanism. Layer 3 pooling is a technology in which multiple communication services that share Layer 3 (network layer) protocols use the same physical infrastructure.

[0040] Layer 3 (Network Layer) is responsible for routing and forwarding data, using IP addresses to identify communication partners and determine the path that packets should be forwarded on. The Network Layer allows communication between different networks. The third layer unit 13 inputs and outputs data and the like to and from the second layer unit 12, the RT radio management unit 14, the MM mobility management unit 15, or the CC call control unit 16.

[0041] [RT radio management unit 14, MM mobility management unit 15, CC call control unit 16] The RT wireless management unit 14 is a function for managing wireless routers in order to simultaneously connect a plurality of mobile terminals to a wireless communication network. The MM mobility management unit 15 is a function that manages mobility between a plurality of mobile terminals and a wireless communication network. The CC call control unit 16 is a function that performs call control between a plurality of mobile terminals and a wireless communication network.

[0042] [Jitter absorption buffer 21] The jitter absorption buffer 21 has an interface with a 40 msec cycle, and receives downstream frame data from the second layer unit 12 every 40 msec, and outputs the data to the TCP / UDP unit 22 . Furthermore, the jitter absorption buffer 21 expands the data of the upstream frame from the TCP / UDP section 22 into a 40 msec upstream frame and outputs it to the second layer section 12 . The detailed operation of the jitter absorption buffer 21 will be described later.

[0043] [TCP / UDP section 22] The TCP / UDP unit 22 is a transport layer in IP communication that specifies the protocol that determines the quality of data transmission. Depending on the content of the data being transmitted, either TCP, which has high communication reliability, or UDP, which has high communication speed, is selected as the protocol (TCP / UDP).

[0044] The TCP / UDP unit 22 inputs downstream frame data from the jitter absorption buffer 21, sets it in the TCP / UDP body portion of the TCP or UDP protocol, converts it to the selected protocol, and outputs it to the IP unit 23. When setting (inputting) it in the TCP / UDP body portion, the data is converted into JSON (Java Script Object Notation) format. In addition, the TCP / UDP unit 22 inputs upstream frame data from the IP unit 23, extracts data from the TCP / UDP body portion, converts it into data to be handled by the jitter absorption buffer 21 (data that can be processed by the second layer unit 12), and outputs it to the jitter absorption buffer 21.

[0045] TCP (Transmission Control Protocol) allows data to be sent in both directions once a connection is established, and has a built-in system for checking errors and ensuring data is delivered in the order it was sent, making it an ideal protocol for transferring information such as still images, data files, and web pages.

[0046] UDP (User Datagram Protocol) allows data to be transferred without establishing a formal connection before sending or receiving data, making it suitable for use in real-time communications and situations where high-speed data transfer is required, such as broadcasting and multitasking network transmissions.

[0047] [IP section 23] The IP unit 23 uses the Internet Protocol (IP), a protocol used in the network layer of IP communications, to assign IP addresses to connected devices and realize the function of communicating between devices. This provides a function for routing packets between networks, and this function enables communication with any device.

[0048] In addition, the IP unit 23 inputs TCP / UDP downstream frame data from the TCP / UDP unit 22 and outputs it to the 5G wireless modem 24 via IP. Then, the IP unit 23 inputs the upstream frame data from the 5G wireless modem 24 and outputs it to the TCP / UDP unit 22.

[0049] [5G Wireless Modem 24] The 5G wireless modem 24 inputs downstream frame data from the IP unit 23 and wirelessly transmits it to a 5G terminal using a 5G wireless signal. In addition, the 5G wireless modem 24 inputs upstream frame data from a 5G terminal and outputs it to the IP unit 23.

[0050] [Operation of this radio] The operation of this radio device will now be described. This radio device realizes a redundant configuration for both non-IP and IP narrowband wireless communication in downstream frame data transmission. The second layer section 12 outputs the downstream frame data to the first layer section 11 and also to the jitter absorption buffer 21 .

[0051] The first layer unit 11 wirelessly transmits data to a narrowband wireless terminal using a narrowband frequency specified in ARIB STD-T61. The processing from the third layer unit 13 to the first layer unit 11 realizes downstream transmission of non-IP communication.

[0052] The jitter buffer 21 also receives downstream frame data at a cycle of 40 msec and outputs it to the TCP / UDP unit 22 . The TCP / UDP unit 22 performs data conversion using either the TCP or UDP protocol, and the IP unit 23 converts it to the IP protocol and outputs it to the 5G wireless modem 24.

[0053] The 5G wireless modem 24 wirelessly transmits IP protocol data to a 5G terminal using a 5G wireless signal. Downstream transmission of IP communication is realized through processing from the jitter absorption buffer 21 to the 5G wireless modem 24.

[0054] Next, for upstream frame data transmission, a redundant configuration of narrowband wireless communication non-IP communication and IP communication is realized. In upstream transmission of non-IP communication, the first layer unit 11 receives upstream frame data from a narrowband wireless terminal and outputs it to the second layer unit 12 .

[0055] The second layer section 12 receives the data from the first layer section 11 and the data from the jitter absorption buffer 21 , selects the properly received data, and outputs it to the third layer section 13 . The upstream transmission of non-IP communication is realized by the processing from the first layer unit 11 to the third layer unit 13.

[0056] In addition, in upstream transmission of IP communication, upstream frame data from a 5G terminal is received by the 5G wireless modem 24 and output to the IP unit 23. The IP unit 23 outputs data from the 5G wireless modem 24 to the TCP / UDP unit 22, which acquires the data according to one of the protocols and outputs it to the jitter absorption buffer 21.

[0057] The jitter absorption buffer 21 inputs data from the TCP / UDP section 22, allocates 40 msec to one of four 10 msec intervals at the timing of input, expands the allocated 10 msec data into the next 40 msec frame, and outputs it to the second layer section 12. The processing in the jitter absorption buffer 21 will be described later with reference to FIG.

[0058] The second layer section 12 inputs non-IP communication data from the first layer section 11 and IP communication data from the jitter absorption buffer 21, selects the data that has been properly (correctly) received, and outputs it to the third layer section 13. If both non-IP communication and IP communication data are received correctly, the data received first is used. Alternatively, either non-IP communication or IP communication may be set as the primary system and the other as the secondary system, with the data from the primary system being used first, and if the data from the primary system is incorrect, the data from the secondary system may be used secondarily.

[0059] Whether or not non-IP communication data is being received correctly can be determined by detecting the synchronization word and checking whether the CRC (Cyclic Redundancy Check) for each channel is OK or NG. Furthermore, whether or not IP communication data has been received correctly can be determined by the presence of upstream frame data, since a CRC exists in the TCP / UDP layer and only packets that have been received correctly are stored in the jitter absorption buffer 21. The upstream transmission of IP communication is realized through processing from the 5G wireless modem 24 to the jitter absorption buffer 21.

[0060] [Frame Synchronization: Figure 2] Frame synchronization in this system will be described with reference to Figure 2. Figure 2 is a schematic diagram of frame synchronization. In this system, the downstream frame timing of the base station for narrowband wireless communication specified in ARIB STD-T61 for non-IP communications is aligned with the frame timing of the 5G base station for IP communications, as shown in Figure 2. This reduces jitter and enables synchronization between non-IP and IP communications.

[0061] Specifically, the downlink frame of a base station for narrowband wireless communication (non-IP communication) is 40 ms, and the beginning of that frame is aligned with the 10 ms beginning timing of the frame of a 5G base station. The timing can be adjusted by synchronizing with the 1 PPS (Pulse Per Second) clock pulse signal of the GPS (Global Positioning System).

[0062] [Jitter absorption buffer processing: Figure 3] Next, the processing in the jitter absorption buffer 21 will be described with reference to Fig. 3. Fig. 3 is a schematic diagram of the processing in the jitter absorption buffer. Although Fig. 3 shows audio data, the processing can also be applied to data other than audio. As shown in FIG. 3, the jitter absorption buffer receives TCH audio data (256 bits) of a downstream frame of ARIB STD-T61 at a cycle of 40 msec, and outputs the audio data to the TCP / UDP unit 22.

[0063] Furthermore, because the speed of the physical layer is high, the data of the upstream 5G frame is compressed in time, and 256-bit data can be received in 10 msec. The 5G frame data is received in 10 msec, which is the 40 msec cycle divided into four, and set in the jitter absorption buffer 21 at the next timing.

[0064] The upstream 5G data set in the jitter absorption buffer 21 is expanded into the next 40 msec frame and output to the second layer section 12. The jitter absorption buffer 21 is reset and updated every 40 msec.

[0065] [Another radio: Figure 4] Next, another radio device will be described with reference to Fig. 4. Fig. 4 is a configuration block diagram of another radio device. As shown in Figure 4, another radio device has a first layer unit 11, a second layer unit 12, a third layer unit 13, an RT radio management unit 14, an MM mobility management unit 15, a CC call control unit 16, a jitter absorption buffer 31, a Multipath TCP / Multipath QUIC unit 32, IP units 33a, 33b, a carrier 5G radio modem 34a, and a local 5G radio modem 34b. Each of the above units is a functional block realized by software.

[0066] The other radio is basically the same as this radio, with the difference being that a Multipath TCP / Multipath QUIC (Quick UDP Internet Connections) unit 32 is provided instead of the TCP / UDP unit 22, two IP units 33a and 33b are provided instead of the IP unit 23, and a carrier 5G radio modem 34a and a local 5G radio modem 34b are provided instead of the 5G radio modem 24. The jitter absorption buffer 31 has the same function as the jitter absorption buffer 21 . The following description will focus on the constituent blocks of another radio device that is different from this radio device.

[0067] [Multipath TCP / Multipath QUIC section 32] The Multipath TCP / Multipath QUIC unit 32 corresponds to the "multiple path distribution and selection unit" in the claims, and either Multipath TCP or Multipath QUIC is selected, and the same data is output to the IP units 33a and 33b using the selected protocol format.

[0068] Multipath TCP allows a TCP connection to use multiple paths simultaneously, maximizing communication throughput and increasing redundancy. Multipath QUIC defines a mechanism for establishing connections using multiple paths, and is a transport protocol that uses UDP to achieve high speeds while providing communication reliability similar to TCP. The QUIC protocol takes advantage of the strengths of TCP, providing encryption using TLS (Transport Layer Security) and minimizing connection establishment time.

[0069] In addition, the Multipath TCP / Multipath QUIC unit 32 also converts the data of the downstream frame into JSON format, sets it in the TCP / UDP body part of the TCP or UDP protocol, converts it into the selected protocol, and outputs it to the IP units 33a and 33b. Furthermore, the Multipath TCP / Multipath QUIC unit 32 receives upstream frame data from the IP units 33a and 33b, extracts data from the TCP / UDP body portion, converts it into data that can be handled by the jitter absorption buffer 31, and outputs it to the jitter absorption buffer 31.

[0070] [IP section 33a] The IP unit 33a is similar to the IP unit 23, but inputs data from the Multipath TCP / Multipath QUIC unit 32 and outputs it to the carrier 5G wireless modem 34a, and inputs data from the carrier 5G wireless modem 34a and outputs it to the Multipath TCP / Multipath QUIC unit 32.

[0071] [IP section 33b] The IP unit 33b is similar to the IP unit 23, but inputs data from the Multipath TCP / Multipath QUIC unit 32 and outputs it to the local 5G wireless modem 34b, and inputs data from the local 5G wireless modem 34b and outputs it to the Multipath TCP / Multipath QUIC unit 32.

[0072] [Carrier 5G Wireless Modem 34a] The carrier 5G wireless modem 34a inputs data from the IP unit 33a and transmits it to a carrier 5G terminal using a carrier 5G wireless signal. In addition, the carrier 5G wireless modem 34a receives a wireless signal from a carrier 5G terminal and outputs the received data to the IP unit 33a.

[0073] [Local 5G Wireless Modem 34b] The local 5G wireless modem 34b inputs data from the IP unit 33b and transmits it to a local 5G terminal using a local 5G wireless signal. In addition, the local 5G wireless modem 34b receives wireless signals from a local 5G terminal and outputs the received data to the IP unit 33b.

[0074] [Another radio activity] The operation of another radio will now be described. Another radio device realizes a redundant configuration of narrowband wireless communication non-IP communication and IP communication for downstream frame data transmission. The second layer section 12 outputs the downstream frame data to the first layer section 11 and also to the jitter absorption buffer 31 .

[0075] The first layer unit 11 wirelessly transmits data to a narrowband wireless terminal using a narrowband frequency specified in ARIB STD-T61. The processing from the third layer unit 13 to the first layer unit 11 realizes downstream transmission of non-IP communication.

[0076] The jitter absorption buffer 31 also receives downstream frame data at a cycle of 40 msec and outputs it to the Multipath TCP / Multipath QUIC unit 32 . The Multipath TCP / Multipath QUIC unit 32 converts data using either the TCP protocol, which can use multiple paths simultaneously, or the QUIC protocol, which uses multiple paths using UDP, and outputs the data to both the IP units 33a and 33b. Then, the IP units 33a and 33b convert the data into an IP protocol and output the data to the carrier 5G wireless modem 34a and the local 5G wireless modem 34b.

[0077] The carrier 5G wireless modem 34a wirelessly transmits IP protocol data to a carrier 5G terminal using a carrier 5G wireless signal. In addition, the local 5G wireless modem 34b wirelessly transmits IP protocol data to a local 5G terminal using a local 5G wireless signal. Downstream transmission of IP communication is realized through processing from the jitter absorption buffer 31 to the carrier 5G wireless modem 34a and the local 5G wireless modem 34b.

[0078] Next, the data transmission of the upstream frame will be described. For upstream frame data transmission, a redundant configuration of narrowband wireless communication non-IP communication and IP communication is realized. In upstream transmission of non-IP communication, the first layer unit 11 receives upstream frame data from a narrowband wireless terminal and outputs it to the second layer unit 12 .

[0079] The second layer section 12 receives the data from the first layer section 11 and the data from the jitter absorption buffer 31 , selects the properly received data, and outputs it to the third layer section 13 . The upstream transmission of non-IP communication is realized by the processing from the first layer unit 11 to the third layer unit 13.

[0080] In addition, in upstream transmission of IP communication, upstream frame data from a terminal for carrier 5G and a terminal for local 5G is received by the wireless modem 34a for carrier 5G and the wireless modem 34b for local 5G, and output to the IP units 33a and 33b.

[0081] The IP units 33a and 33b output data from the carrier 5G wireless modem 34a and the local 5G wireless modem 34b to the Multipath TCP / Multipath QUIC unit 32, extract and acquire the data according to one of the protocols selected by the Multipath TCP / Multipath QUIC unit 32, and output it to the jitter absorption buffer 31.

[0082] The jitter absorption buffer 31 inputs data from the Multipath TCP / Multipath QUIC unit 32, allocates the data to one of the four 10 msec intervals obtained by dividing 40 msec at the input timing, expands the allocated 10 msec data into the next 40 msec frame, and outputs it to the second layer unit 12.

[0083] The second layer section 12 receives the data from the first layer section 11 and the data from the jitter absorption buffer 31 , selects the properly received data, and outputs it to the third layer section 13 . Upstream transmission of IP communication is realized through processing from the carrier 5G wireless modem 34a and the local 5G wireless modem 34b to the jitter absorption buffer 31.

[0084] [Effects of the embodiment] According to this radio, the TCP / UDP unit 22 branches and inputs transmission information from the second layer unit 12 to the first layer unit 11, places it in the body part of the TCP / UDP for IP communication and outputs it via IP communication, and also acquires reception information from the body part of the TCP / UDP input via IP communication and outputs it to the second layer unit 12. The second layer unit 12 outputs the transmission information to the first layer unit 11 and also branches and outputs it to the TCP / UDP unit 22, inputs reception information from the first layer unit 11 and inputs reception information from the TCP / UDP unit 22, compares both pieces of reception information, and selects the reception information that has been correctly received. Therefore, it is possible to add IP communication to narrowband wireless communication that does not support IP communication to create a redundant configuration, and has the effect of realizing highly reliable wireless communication using multiple lines, including non-IP communication lines and IP communication lines.

[0085] In another radio device, a multipath distribution and selection unit (Multipath TCP / Multipath QUIC unit) branches and inputs transmission information from the second layer unit 12 to the first layer unit 11, places it in the body part of TCP / UDP for IP communication, distributes it to multiple paths of IP communication, and outputs it, and also acquires reception information from the body part of TCP / UDP input in the multiple path IP communication, selects the reception information of one of the paths, and outputs it to the second layer unit, and the second layer unit 12 outputs the transmission information to the first layer unit 11 and also branches and outputs it to the multipath distribution and selection unit, inputs reception information from the first layer unit 11 and inputs reception information from the multipath distribution and selection unit, compares both pieces of reception information, and selects the reception information that has been correctly received.Therefore, it is possible to add IP communication to narrowband radio communication that does not support IP communication to create a redundant configuration, and has the effect of realizing highly reliable radio communication using multiple lines, including non-IP communication lines and IP communication lines.

[0086] In particular, another radio has two IP communication systems, one for carrier 5G and one for local 5G. Therefore, if IP communication for carrier 5G becomes congested during a disaster, IP communication for local 5G, which is less affected by the disaster, can be used, further improving redundancy.

[0087] Furthermore, this system is equipped with this radio device or another radio device, and has the effect of improving redundancy by adding IP communication to narrowband radio communication that does not support IP communication, and realizing highly reliable radio communication using multiple lines, including non-IP communication lines and IP communication lines. [Industrial Applicability]

[0088] The present invention is suitable for radio devices and radio communication systems that add IP communication to narrowband radio communication that does not support IP communication to create a redundant configuration, and that achieve highly reliable radio communication using multiple lines, including non-IP lines and IP lines. [Explanation of symbols]

[0089] 11...first layer unit, 12...second layer unit, 13...third layer unit, 14...RT radio management unit, 15...MM mobility management unit, 16...CC call control unit, 21, 31...jitter absorption buffer, 22...TCP / UDP unit, 23, 33a, 33b...IP unit, 24...5G wireless modem, 32...Multipath TCP / Multipath QUIC unit, 34a...carrier 5G wireless modem, 34b...local 5G wireless modem

Claims

1. A narrowband wireless communication device that does not support IP communication, a first layer section corresponding to Layer 1 configured in accordance with the narrowband digital communication standard ARIB STD-T61, and a second layer section corresponding to Layer 2; as an IP communication means, a TCP / UDP unit which branches and inputs transmission information from the second layer unit to the first layer unit, puts the information in a TCP / UDP body part for IP communication, and outputs the information in IP communication, and also acquires reception information from the TCP / UDP body part input in IP communication and outputs the information to the second layer unit; a second layer unit that outputs the transmission information to the first layer unit, branches the information, and outputs it to the TCP / UDP unit; receives reception information from the first layer unit, receives reception information from the TCP / UDP unit, and compares both sets of reception information to select correctly received information.

2. A narrowband wireless communication device that does not support IP communication, a first layer section corresponding to Layer 1 configured in accordance with the narrowband digital communication standard ARIB STD-T61, and a second layer section corresponding to Layer 2; as an IP communication means, a multi-path distribution / selection unit that branches and inputs transmission information from the second layer unit to the first layer unit, puts the information into a TCP / UDP body part for IP communication, distributes the information to a plurality of paths for IP communication, and outputs the information, and also acquires reception information from the TCP / UDP body part input in the plurality of paths for IP communication, selects the reception information of one of the paths, and outputs the information to the second layer unit; A radio device characterized in that the second layer unit outputs the transmission information to the first layer unit and branches it to output to the multiple path distribution / selection unit, inputs received information from the first layer unit and inputs received information from the multiple path distribution / selection unit, compares both pieces of received information, and selects correctly received received information.

3. 3. The radio equipment according to claim 1, further comprising a jitter absorption buffer with a period of 40 msec provided between said second layer section and said IP communication means.

4. 3. The radio device according to claim 1, wherein the second layer unit converts the data format into a JSON format when putting information into a body portion of TCP / UDP.

5. A wireless communication system including the radio device according to claim 1 or 2, A wireless communication system characterized in that the second layer unit matches the timing of the beginning of a downstream frame of the standard with the timing of the beginning of a downstream frame of IP communication in order to keep reception timing constant.

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