JP7460244B1 - Wireless transmission device, wireless transmission method, and data processing method - Google Patents

Abstract

[Problem] To suppress transmission delays that may occur in a wireless transmission device that receives multiple data frames obtained by dividing one piece of data via multiple wireless lines. [Solution] Multiple data frames are allocated to an assembly memory and an order memory according to the priorities contained in their division headers. High-priority data frames are assembled in the assembly memory to generate packets, and low-priority data frames are rearranged in the order memory. Packets based on high-priority data frames are sent to a specified line after assembly processing, and low-priority data frames are rearranged and sent sequentially to the specified line. Data frames related to high priority are sent to the specified line without waiting for processing of data frames related to low priority, so transmission delays can be suppressed. [Selected Figure] Figure 4

Description

The present invention relates to a wireless transmission device, a wireless transmission method, and a data processing method that perform data transmission by traffic bonding.

When transmitting a large amount of data between wireless transmission devices via multiple wireless lines, the original data is divided and transmitted, and the divided data is assembled in a predetermined order at the receiving side to restore the original data. Patent Document 1 discloses a technique in which the transmitting wireless transmission device divides the original data into multiple divided data and transmits them, and the receiving wireless transmission device distributes the divided data to multiple assembly memories associated with the identification information of the divided data to reconstruct the original data. Patent Document 2 discloses a technique in which packets are classified into high-priority packets and low-priority packets according to their priority in a wireless transmission system, and the transmitting side transmits the high-priority packets via a wireless transmission link, while the transmitting side divides the low-priority packets into fixed-length cells and transmits them via a wireless transmission link, and the receiving side restores the cells of the low-priority packets to the low-priority packets before division. Patent Document 3 discloses a technique in a transmission system involving frame division processing, in which a division circuit has queues by priority, divides an input frame according to a division size to generate multiple divided frames, divides and distributes the divided frames to queues corresponding to the priorities of the input frames determined based on priority criteria, and reads frames from the priority queues based on a priority control algorithm. Patent Document 4 discloses a technology for realizing high-speed, large-capacity stream distribution by performing transfer processing on an individual packet basis, even if the stream data of one piece of content is transferred in divided packets, without waiting until all packets are collected, in a stream distribution method.

In a packet transmission network, when transmitting data via wireless lines, the transmission capacity of one wireless line is small, so multiple wireless lines are bundled together to virtually expand the transmission capacity as one wireless line. ing. In other words, by distributing a plurality of pieces of data over a plurality of wireless lines when transmitting data, it is possible to secure the transmission capacity of the entire wireless line and to transmit large amounts of data all at once. Traffic bonding is the process of transmitting data using a virtual line that virtually combines multiple wireless lines. Traffic bonding divides packets related to data transmission into multiple data frames and distributes the data frames to wireless lines in a round-robin method, thereby making the most of the wireless band that bundles multiple wireless lines. Enables large-capacity transmission. In recent years, the number of systems that require low delay in packet transmission, such as time synchronization and fifth generation communication systems (5G), is increasing, so traffic bonding technology is useful.

JP 2019-134251 A Republished WO2013/111772 Japanese Patent Application Publication No. 2007-288491 Japanese Patent Application Publication No. 2002-118589

When receiving multiple pieces of data that are the result of dividing the original data, the receiving side must assemble the multiple pieces of data in a specified order to restore the original data, or rearrange the data according to the priority of each piece of data. However, the above-mentioned technology has an issue in that data assembly and data rearrangement are not unified, and when the number of available wireless lines is limited, low-priority data occupies a wireless line, causing a delay in the transmission of high-priority data.

The above problem will be explained by taking Patent Document 1 as an example. FIG. 1 shows a wireless transmission system 100 according to the prior art, in which a wireless transmission device 10 and a wireless transmission device 20 are arranged via four wireless lines L1 to L4. The wireless transmission device 10 and the wireless transmission device 20 are connected to user lines 300 and 301 (eg, Ethernet (registered trademark)) related to a communication carrier's network, and transmit and receive user data. Four antennas 101 to 104 are installed in the wireless transmission device 10, and four antennas 201 to 204 are installed in the wireless transmission device 20, corresponding to the four wireless lines L1 to L4.

FIG. 2 shows a configuration example of the wireless transmission device 10 (transmission side), which receives user data received from the user line 300 as a packet and limits the band so that the transmission rate is in accordance with the total band information of the wireless line. A band control unit 11, a division unit 12 that divides user data into fixed-length data frames, a line distribution unit 13 that distributes data frames according to the wireless bands of wireless lines L1 to L4, and wireless transmission units 14_1 to 14_4, Equipped with. FIG. 3 shows an example of the configuration of the wireless transmission device 20 (receiving side), which includes wireless receiving units 21_1 to 21_4 that receive data frames transmitted via wireless lines L1 to L4, and which assembles a plurality of data frames into an original. The device includes an assembling unit 22 that restores packets, and a control unit 23 that performs priority control of packets. The assembly unit 22 includes an assembly memory 221 (high priority assembly memory 221_1, low priority memory 221_2) that assembles divided data frames in a predetermined order, and a user data priority set in the header information of a plurality of data frames. and a memory allocating unit 222 that allocates the data frame to the assembly memory 221_1 or 221_2 according to the degree.

As shown in FIG. 2, in the wireless transmission device 10 on the transmitting side, user data is divided by the dividing section 12 and data frames are transmitted, and as shown in FIG. 3, the data frames are assembled in the wireless transmission device 20 on the receiving side. At step 22, the data is assembled and the original data is restored. The assembly unit 22 includes an assembly memory 221_1 for high-priority data frames and an assembly memory 221_2 for low-priority data frames, and while reading the assembled low-priority data frame (low 1) from the assembly memory 221_2. Even if the assembly of the high-priority data frame (high 2) is completed in the assembly memory 221_1, it cannot be read because the user line 301 is occupied by the low-priority data frame, and as a result, the high-priority data frame Transmission delays occur.

The above transmission delay will be explained using the data frame input/output timing diagram of FIG. 7. The upper drawing in FIG. 7 shows the timing of data frame input to the assembly section 22 in chronological order. The high priority data frame is divided into two parts. For example, the high priority data frame "High 1" is divided into "High 1-1" and "High 1-2", and the high priority data frame "High 2" is divided into "High 2-1" and "High 1-2". 1" and "High 2-2." The low priority data frame is divided into four parts, for example, the low priority data frame "Low 1" is divided into "Low 1-1", "Low 1-2", "Low 1-3", "Low 1-4". It is divided into. The lower drawing in FIG. 7 shows the data frame output timing of the control unit 23 in chronological order. First, when the assembly memory 221_1 completes assembling the high priority data frames "High 1-1" and "High 1-2" into the high priority data frame "High 1", the control unit 23 controls the high priority data frame "High 1". "High 1" is output to the user line 301. Next, in the assembly memory 221_2, the low priority data frames "Low 1-1", "Low 1-2", "Low 1-3", "Low 1-4" are changed to the low priority data frame "Low 1". When the assembly is completed, the control unit 23 outputs the low priority data frame "Low 1" to the user line 301 even though the high priority data frame "High 2-1" has been input in the assembly memory 221_1. Thereafter, even if the high priority data frame "High 2-2" is input to the assembly memory 221_1 and the assembly with the already input high priority data frame "High 2-1" is completed, the low priority data frame of the control unit 23 It is necessary to wait for the output of "low 1" to be completed, and after the output is completed, the control unit 23 will output the high priority data frame "high 2" to the user line 301. In this way, while the user line 301 is occupied by the low priority data frame "Low 1", a transmission delay of the high priority data frame "High 2" occurs.

An object of the present invention is to provide a wireless transmission device, a wireless transmission method, and a data processing method that solve the above-mentioned problems.

The first aspect of the present invention is a wireless transmission device that includes a wireless receiving unit that receives multiple data frames obtained by dividing one piece of data via multiple wireless lines, an assembly memory that performs an assembly process to generate packets according to the priorities included in the division headers attached to the multiple data frames, and an assembly unit that distributes the multiple data frames to a sequence memory that performs a rearrangement process on the multiple data frames, and a control unit that selectively sends the packets read from the assembly memory or the multiple data frames read from the sequence memory to a specified line.

A second aspect of the present invention is a wireless transmission method that receives multiple data frames obtained by dividing one piece of data via multiple wireless lines, performs an assembly process to generate packets according to a first priority included in a division header attached to the multiple data frames, performs a rearrangement process according to a second priority lower than the first priority included in the division header attached to the multiple data frames, transmits the packets related to the first priority to a specified line after the assembly process, and sequentially transmits the multiple data frames related to the second priority to the specified line after the rearrangement process.

A third aspect of the present invention is to detect the priorities included in the division headers of multiple data frames obtained by dividing one data, and to detect the priorities included in the division headers of multiple data frames obtained by dividing one data, and to detect the priorities included in the division headers of multiple data frames obtained by dividing one data, and to detect the priorities included in the division headers of multiple data frames formed by dividing one data, and to detect the priorities included in the division headers of multiple data frames formed by dividing one data, Execute the assembly process to generate packets, output the packets related to the first priority after the assembly process, and arrange them into multiple data frames in which the second priority, which is lower than the first priority, is set as the priority. This data processing method executes a rearrangement process and sequentially outputs a plurality of data frames related to a second priority after the rearrangement process.

According to the present invention, when a high priority is set for a plurality of data frames formed by dividing one data, the packets are output after assembly processing, and when a low priority is set, a plurality of data frames are output. Since data frames are sorted and output sequentially, high-priority packets can be output without waiting for multiple low-priority data frames to be processed, reducing transmission delays. can.

FIG. 1 is a block diagram illustrating an example of a wireless transmission system. 1 is a block diagram illustrating a configuration example of a receiving side wireless transmission device in a wireless transmission system. FIG. 1 is a block diagram illustrating a configuration example of a transmitting side wireless transmission device in a wireless transmission system. FIG. 2 is a block diagram showing an example of the configuration of a receiving-side wireless transmission device according to an embodiment of the present invention; 1 is a block diagram showing a wireless transmission system according to an embodiment of the present invention; FIG. 1 is a block diagram showing a detailed configuration example of a receiving side wireless transmission device according to an embodiment of the present invention. 11 is an input/output timing diagram of a data frame illustrating a transmission delay of a high priority data frame that may occur in a receiving wireless transmission device. 4 is an input/output timing diagram of a data frame in a receiving-side wireless transmission device according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating a process of a receiving side wireless transmission device according to an embodiment of the present invention. 2 is a block diagram showing a hardware configuration of a receiving-side wireless transmission device according to an embodiment of the present invention; FIG. 5 is a flowchart showing a software configuration of a receiving-side wireless transmission device according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A wireless transmission device, a wireless transmission method, and a data processing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a block diagram showing a wireless transmission device 1 according to one embodiment of the present invention. This embodiment relates to a wireless transmission device to which traffic bonding is applied. The wireless transmission device 1 comprises a communication unit 2, an assembly memory 3, a sequence memory 4, and a memory allocation unit 5. The wireless transmission device 1 corresponds to the receiving side of traffic bonding, and receives one piece of data divided into multiple pieces of divided data from a transmitting wireless transmission device (not shown) together with identification information for each piece of divided data.

The assembled memory 3 is a memory associated with identification information included in the divided data. The plural pieces of divided data are assembled to restore the original data in the order in which one piece of data is divided into a plurality of pieces of divided data in the wireless transmission device on the transmitting side. For example, if a priority (high priority, low priority) is set for the identification information, the assembly memory 3 mainly assembles the high priority divided data to restore the original data.

The order memory 4 is a memory associated with identification information included in the divided data. The order memory 4 rearranges one piece of data in the order in which it is divided into a plurality of pieces of data by the wireless transmission device on the transmitting side. The memory distribution unit 5 distributes each divided data to the assembled memory 3 or the sequential memory 4 using the identification information set in the divided data.

As described above, the wireless transmission device 1 according to the present embodiment includes an assembly memory 3 and a sequence memory 4 that are associated with identification information of divided data obtained by dividing one data. The memory distribution unit 5 distributes the divided data to either the assembled memory 3 or the sequential memory 4 using the identification information set in the divided data. That is, in the assembly memory 3 and the order memory 4, assembly or rearrangement is performed on divided data in parallel. Therefore, by using the wireless transmission device 1 according to the present embodiment, it is possible to reduce assembly delays caused by not being able to receive some divided data. Thereby, communication quality can be improved while maintaining data transmission efficiency between wireless transmission devices.

FIG. 5 is a block diagram showing a configuration example of a wireless transmission system according to an embodiment of the present invention, which is similar to the configuration example shown in FIG. A device 30 is provided. The wireless transmission system 200 includes a wireless transmission device 10 and a wireless transmission device 30, which are connected to user lines 300 and 301, respectively. The wireless transmission devices 10 and 30 are communicatively connected via four wireless lines L1 to L4. The four antennas 101 to 104 mounted on the wireless transmission device 10 and the four antennas 201 to 204 mounted on the wireless transmission device 30 transmit and receive radio waves via the wireless lines L1 to L4. Note that the number of wireless lines is not limited to "4", and three wireless lines or five or more wireless lines may be provided. In this embodiment, for convenience of explanation, it is assumed that the wireless transmission system 200 is provided with four wireless lines L1 to L4.

In the wireless transmission devices 10 and 30 described above, wireless communication is performed by bonding four wireless lines L1 to L4 for one traffic hook. In other words, the wireless transmission devices 10 and 30 secure relatively large transmission capacity by bonding multiple wireless lines.

The wireless transmission device 10 also receives user data as packets via the user line 300 and divides the packets into multiple data frames. Here, "packets" correspond to "data" in this embodiment, and "data frames" correspond to "divided data." In the following description, "user data" will simply be referred to as "packets."

The wireless transmission device 10 performs band control of user data received via the user line 300 based on total band information of the wireless lines L1 to L4. The wireless transmission device 10 divides the band-controlled user data into a plurality of data frames and transmits them to the wireless transmission device 30 via any of the wireless lines L1 to L4. Wireless transmission device 30 receives a plurality of data frames from wireless transmission device 10 via wireless lines L1 to L4. The wireless transmission device 30 assembles or rearranges a plurality of data frames and outputs the assembled data frames.

FIG. 2 is a block diagram showing an example of the configuration of a wireless transmission device 10 (wireless transmission device 10 on the transmitting side of a wireless transmission system 200) according to this embodiment, which is similar to the wireless transmission device 10 on the transmitting side of the wireless transmission system 100 (FIG. 1) described above. In this embodiment, the wireless transmission device 10 transmits user data received via a user line 300 to the wireless transmission device 30, and includes a bandwidth control unit 11, a division unit 12, a line allocation unit 13, and wireless transmission units 14_1 to 14_4.

Bandwidth control unit 11 receives user data received via user line 300 as a packet, and performs band control on the user data according to total band information of wireless lines L1 to L4. Bandwidth control section 11 outputs the user data subjected to bandwidth control to division section 12 . The dividing unit 12 divides the user data subjected to bandwidth control into fixed length data frames. The dividing unit 12 generates a plurality of data frames and adds a dividing header to each data frame. The division header includes a sequence number indicating the priority of the data frame and the order of data.

The line distribution unit 13 distributes the plurality of data frames divided by the division unit 12 to the wireless lines L1 to L4 according to the wireless bands of the wireless lines L1 to L4. Specifically, the line distribution unit 13 outputs a plurality of data frames to the wireless transmission units 14_1 to 14_4 corresponding to the wireless lines L1 to L4. Since the wireless transmission device 10 applies traffic bonding, the line distribution unit 13 distributes a plurality of data frames to the wireless lines L1 to L4 in a round robin manner according to the wireless bands of the wireless lines L1 to L4. Thereby, the wireless transmission device 10 makes maximum use of the wireless band to realize large-capacity wireless transmission.

The wireless transmission units 14_1 to 14_4 are provided corresponding to the wireless lines L1 to L4, and transmit the plurality of data frames distributed by the line distribution unit 13 to the wireless transmission device 30 via the wireless lines L1 to L4. Specifically, the wireless transmitter 14_1 corresponds to the wireless line L1, and transmits the data frame distributed to the wireless line L1 to the wireless transmission device 30. Similarly, the wireless transmitting units 14_2 to 14_4 correspond to the wireless lines L2 to L4, and transmit data frames distributed to the wireless lines L2 to L4 to the wireless transmission device 30.

FIG. 6 is a block diagram showing a detailed configuration example of a receiving side wireless transmission device according to an embodiment of the present invention. The wireless transmission device 30 receives a plurality of data frames from the wireless transmission device 10 on the transmitting side (see FIG. 2), and the assembly section 22 and the control section 23 in the wireless transmission device 20 shown in FIG. and the control unit 33. The wireless transmission device 30 includes wireless receiving sections 21_1 to 21_4, an assembly section 32, and a control section 33. The wireless transmission device 30 assembles a plurality of data frames into packets before being divided in the wireless transmission device 10, or rearranges the plurality of data frames, and sequentially transmits the packets via the user line 301.

In detail, the wireless receiving units 21_1 to 21_4 are provided corresponding to the wireless lines L1 to L4, receive a plurality of data frames transmitted from the wireless transmission device 10 via the wireless lines L1 to L4, and assemble and assemble data frames. It outputs to section 32. The assembly section 32 includes an assembly memory 321, a memory allocation section 322, a sequence memory 323, and a header replacement section 324. The assembling unit 32 generates a packet by rearranging and assembling a plurality of data frames, or only rearranging them, based on the division header added to the data frame. The header changing unit 324 rewrites the division header of the rearranged data frame read from the order memory 323 into a fragment header. The control unit 33 performs priority control on packets output from the assembly memory 321 and packets output from the order memory 323. When packets are output from the assembly memory 321 and the order memory 323 at the same time, the control unit 33 gives priority to the packet with the higher priority of user data before division set in the header information of the packet to the user line 301. Performs control such as sending.

Next, the process of the wireless transmission device 30 (FIG. 6) that is communicatively connected to the wireless transmission device 10 (FIG. 2) according to this embodiment will be described with reference to FIG. 9 (steps S1 to S8). In the wireless transmission device 10, the division unit 12 divides user data into multiple data frames corresponding to the wireless lines L1 to L4 used for traffic bonding, and assigns a division header to each of the data frames. The line allocation unit 13 transmits the multiple data frames to the wireless transmission device 30 via the wireless transmission units 14_1 to 14_4.

In the wireless transmission device 30, the wireless receiving units 21_1 to 21_4 receive a plurality of data frames via the wireless lines L1 to L4 (step S1). The plurality of data frames are sent to the assembler 32. In the assembly section 32, the memory allocation section 322 refers to the priority included in the division header given to the data frame and sends the data frame to the assembly memory 321 or the order memory 323 (step S2). Specifically, high priority data frames are sent to assembly memory 321 and low priority data frames are sent to sequential memory 323. When writing high-priority data frames to the assembly memory 321, the sequence numbers included in the division header are used to rearrange and assemble the data frames (step S3). On the other hand, when writing low-priority data frames to the order memory 323, only the data frames are rearranged using the sequence number included in the division header (step S4).

The control unit 33 monitors the assembly memory 321 and the order memory 323, and when an assembled data frame is stored in the assembly memory 321, the control unit 33 reads out the assembled data frame corresponding to the original user data from the assembly memory 321 (step S5). On the other hand, when a rearranged data frame is stored in the order memory 323, the control unit 33 reads out the rearranged data frame from the order memory 323 (step S6). The read process in the control unit 33 prioritizes the assembly memory 321 over the order memory 323. The rearranged data frame read out from the order memory 323 is rewritten from the division header to the fragment header in the header replacement unit 324 (step S7). Since the fragment header is larger than the division header, the wireless transmission device 30 on the receiving side replaces the header, thereby enabling efficient use of the wireless bandwidth. The control unit 33 outputs the data frame read out from the assembly memory 321 or the order memory 323 to the user line 301 as a packet (step S8). At this time, the control unit 33 preferentially reads out high-priority data frames read out from the assembly memory 321 compared to low-priority data frames read out from the sequence memory 323, and outputs them as packets to the user line 301.

Next, in order to demonstrate the effects of this embodiment, a description will be given using the data frame input/output timing diagram of FIG. 8. The upper drawing in FIG. 8 shows the timing of data frame input to the assembly section 32 in chronological order. Similar to FIG. 7, the high priority data frame is divided into two parts, for example, the high priority data frame "High 1" is divided into "High 1-1", "High 1-2", and the high priority data frame "High 2". is divided into "High 2-1" and "High 2-2". The low priority data frame is divided into four parts, for example, the low priority data frame "Low 1" is divided into "Low 1-1", "Low 1-2", "Low 1-3", "Low 1-4". It is divided into. As explained with reference to FIG. 6, high priority data frames are distributed to the assembly memory 321, and low priority data frames are distributed to the order memory 323. The lower drawing in FIG. 8 shows the data frame output timing of the control unit 33 in chronological order.

First, when the assembly memory 321 completes assembling the high priority data frames "High 1-1" and "High 1-2" into the high priority data frame "High 1", the control unit 33 controls the high priority data frame "High 1". "High 1" is output to the user line 301. The low priority data frames "Low 1-1", "Low 1-2", "Low 1-3", and "Low 1-4" are sorted but read from the order memory 323 without being assembled. After the high priority data frame "High 1" is output, the data frames are sequentially output to the user line 301. On the other hand, when the assembly memory 321 completes the assembly from the high priority data frames "High 2-1" and "High 2-2" to the high priority data frame "High 2", the low priority data frame "Low 1-4" is completed. After the output of , the high priority data frame "High 2" is output to the user line 301 without delay.

In this embodiment, as shown in FIG. 8, even when a divided data frame is input to the assembly unit 32 under the same conditions as in FIG. 7, the division header is replaced with the fragment header without assembling the low-priority data frame. Since only the processing is executed and output from the control unit 33 to the user line 301, a high priority data frame (for example, "High 2") can be output without waiting for a low priority data frame. As is clear from comparing FIGS. 7 and 8, there is no need to wait for the assembly and output of the low-priority data frame "Low 1" to be completed, and the high-priority data frames can be sequentially output after assembly, so no transmission delay occurs.

The present invention is not limited to the above-described embodiment. For example, in the assembly unit 32 of the wireless transmission device 30 in FIG. 6, one assembly memory 321 and one sequence memory 323 are provided, but multiple memory units may be provided. If the device (not shown) to which the wireless transmission device 30 outputs is capable of replacing the division header for the low-priority data frame with a fragment header, the header replacement unit 324 may be omitted from the assembly unit 32. Furthermore, the assembly memory and sequence memory are composed of RAM (random access memory) or semiconductor memory, but an external memory via USB may also be applied.

In this embodiment, in the wireless transmission device 30, the low priority data frames are only rearranged without being assembled in the order memory 323, so that it is possible to reduce the time occupied by the user line 301 by the low priority data frames. This makes it possible to suppress transmission delays of high-priority data frames. Further, after reading the low priority data frame from the order memory 323, the header reassignment unit 324 replaces the division header with a fragment header if the device (not shown) to which the user line 301 is connected can recognize it. In this way, the validity of the low priority data frame can be guaranteed. If the user line 301 is a line with fragment specifications, for example, Ethernet (registered trademark), it is possible to use fragmented low-priority data frames as they are.

Next, the hardware configuration of the receiving side wireless transmission device according to this embodiment will be described with reference to FIG. 10. FIG. 10 is a block diagram showing the hardware configuration of the wireless transmission device 40, which includes a processor 41, a communication module 42, a memory section 43, and an output section 44. The processor 41 controls the processing of the wireless transmission device 40. For example, the CPU (Central Processing Unit) executes a predetermined program (for example, C language for embedding) related to data frame processing to perform a predetermined function. achieve. The communication module 42 performs link aggregation of a plurality of wireless lines L1 to Ln (n is an integer of 2 or more) used for traffic bonding, and receives a plurality of data frames transmitted from a transmitting side wireless transmission device (not shown). . The memory section 43 includes the above-described assembled memory 321 and sequential memory 323, and a plurality of memories may be combined, or a plurality of memory areas may be formed in a single memory. The output unit 44 sequentially outputs the high-priority data frames as packets after the memory unit 43 completes assembling them. Further, the output unit 44 rearranges the low priority data frames in the memory unit 43 and sequentially outputs them as packets.

Next, the processing steps of the wireless transmission device 40 will be described with reference to the flowchart of FIG. 11. FIG. 11 is a flowchart showing the software configuration of the wireless transmission device 40 (steps S11 to S16). First, the communication module 42 receives a plurality of data frames via a plurality of wireless lines L1 to Ln (step S11). The plurality of data frames are sent to the memory unit 43, and high-priority data frames and low-priority data frames are distributed to different memory areas or different memories according to the priority included in the fragmentation header. When the high-priority data frames are read into the memory unit 43 (step S12), the high-priority data frames are assembled according to the data fragmentation order in the wireless transmission device (not shown) of the sender to restore the original data (step S13). On the other hand, when the low-priority data frames are read into the memory unit 43 (step S14), they are rearranged in a predetermined order according to the sequence number or the like (step S15). In step S15, the fragmentation header of the low-priority data frame may be replaced with a fragmentation header. After that, the high priority data frame and the low priority data frame are read out from the memory unit 43 and sent to the outside from the output unit 44 (step S16).

In the above-mentioned embodiment, the receiving wireless transmission device receives multiple data frames transmitted by traffic bonding from the transmitting wireless transmission device and executes a predetermined processing step (assembly processing, rearrangement processing), and a program for implementing the processing step is stored in a storage medium (ROM, RAM, or semiconductor memory) and executed by a processor (such as a CPU). The program itself does not need to be stored in the wireless transmission device, and may be distributed from another device. The program may also be for realizing part of the above-mentioned functions. Furthermore, the program may be a so-called differential file (or differential program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

Finally, the present invention is not limited to the above-described embodiment, and the configuration of the transmitting wireless transmission device is not limited to the configuration shown in FIG. 2, and the configuration of the receiving wireless transmission device is not limited to the configurations shown in FIG. 4 or FIG. 6. The above-described embodiment describes traffic bonding via multiple wireless lines, but link aggregation technology may also be used. The present invention also includes various modifications, design changes, and alterations within the technical scope defined in the appended claims.

The present invention relates to a wireless transmission system consisting of a wireless transmission device on the transmitting side and a wireless transmission device on the receiving side, but is also applicable to communication between base stations and large-capacity data communication between servers. In particular, it is applicable to telecommunication systems (eg, 5G) that require low delay in large-capacity packet transmission.

1, 10, 20, 30, 40 Wireless transmission device 2 Communication unit 3, 321 Assembly memory 4, 323 Order memory 5, 322 Memory allocation unit 11 Band control unit 12 Division unit 13 Line allocation unit 14 Wireless transmission unit 21 Wireless Receiving section 32 Assembly section 33 Control section 324 Header replacement section

Claims (7)

a wireless receiving unit that receives multiple data frames obtained by dividing one data via multiple wireless lines;
an assembling memory that performs assembling processing to generate packets according to priorities included in division headers given to the plurality of data frames; and an ordering memory that performs sorting processing on the plurality of data frames; An assembly section that sorts multiple data frames,
a control unit that selectively sends the packet read from the assembled memory or the plurality of data frames read from the sequential memory to a predetermined line;
A wireless transmission device equipped with. The wireless transmission device according to claim 1, wherein the assembly unit distributes the plurality of data frames having a first priority set as the priority to the assembly memory and executes the assembly process to generate the packets, distributes the plurality of data frames having a second priority set as the priority, which is lower than the first priority, to the order memory and executes the rearrangement process, and the control unit reads the packets relating to the first priority from the assembly memory and sends them to the specified line, and reads the plurality of data frames relating to the second priority from the order memory and sends them sequentially to the specified line. The wireless transmission device according to claim 1, wherein the assembling unit replaces the division header of the plurality of data frames read from the sequential memory with a fragment header. Receive multiple data frames made by dividing one data via multiple wireless lines,
generating a packet by performing an assembly process according to a first priority included in a division header added to the plurality of data frames;
performing a sorting process according to a second priority lower than the first priority included in the division header added to the plurality of data frames;
Sending the packet related to the first priority to a predetermined line after executing the assembly process,
sequentially transmitting the plurality of data frames related to the second priority to the predetermined line after performing the sorting process;
Wireless transmission method. The wireless transmission method according to claim 4, wherein the single data is divided into fixed-length data frames after band control according to the entire frequency band of wireless transmission, and the multiple data frames are distributed to the multiple wireless lines and transmitted. Detecting priorities included in division headers of a plurality of data frames obtained by dividing one piece of data;
performing an assembly process on the plurality of data frames having a first priority set as the priority to generate a packet;
outputting the packets related to the first priority after the reassembly process;
performing a rearrangement process on the plurality of data frames having a second priority set as the priority, the second priority being lower than the first priority;
outputting the plurality of data frames related to the second priority in sequence after the rearrangement processing;
Data processing methods. The data processing method according to claim 6, wherein the single data is divided into fixed-length data frames according to a division order, and the assembly process assembles the multiple data frames according to the division order.

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