JP2006238144A - Fwa device, method for transmitting information, program for fwa device, and recording medium with the program recorded thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to suppress the reduction of communication quality, even when a packet loss is suddenly caused in a packet transmission route in an FWA device having mesh constitution. <P>SOLUTION: The FWA device 1 converts packets of information desired to be transmitted into error correction codes, selects a plurality of transmission routes having no pass overlap from a previously stored transmission route list, calculates the allocation distribution of packets to the selected transmission routes, divides the packets in accordance with the calculated packet allocation distribution, adds transmission route information of divided packets, the common ID number of the divided packets and an assembly order number to each of the divided packets, and transmits the divided packets to each transmission route on the basis of the transmission route information added to each divided packets. When receiving the divided packets, the FWA device 1 assembles the divided packets having the same ID number out of the received divided packets on the basis of the assembly order number and decodes the packets by using the error correction codes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless communication technology, and in particular, in a fixed wireless access scheme (FWA: Fixed Wireless Access) in a mesh configuration, even when packet loss occurs in a transmission route selected by a wireless station that is a source of information, The present invention relates to an FWA apparatus, an information transmission method, a program for an FWA apparatus, and a recording medium on which the program is recorded.

  In recent years, research and development related to FWA, which is one of subscriber data communication services by radio, has been actively performed. In FWA, for example, a wireless device (FWA device) is installed in a wireless station such as a building, and wireless communication is performed with FWA devices installed in other wireless stations.

  Here, a mesh-structured FWA is proposed in which there are a plurality of transmission routes from a wireless station that is a source of information to a wireless station that is a destination of information.

  In this mesh-structured FWA, when the communication quality between specific wireless stations deteriorates due to rain or the like, the information transmission source wireless station uses a transmission route that bypasses the path between the specific wireless stations. Communication quality is improved by transmitting information to a destination radio station.

  FIG. 8 is a diagram illustrating an example of a mesh-structured FWA. The FWA shown in FIG. 8 includes a wireless station a, a wireless station b, a wireless station c, a wireless station d, and a wireless station e. Each wireless station notifies each other of communication quality information as needed, and collects communication quality information between the wireless stations.

  When transmitting information from the wireless station a to the wireless station e, a transmission route (wireless station a) where the wireless station b relays information transmitted from the wireless station a to the wireless station e as a transmission route. → wireless station b → wireless station e), a transmission route (wireless station a → wireless station c → wireless station e) where the wireless station c relays information transmitted from the wireless station a to the wireless station e, etc. There are multiple transmission routes.

  Each of the plurality of transmission routes includes a combination of paths between the wireless stations. For example, the transmission route (wireless station a → wireless station c → wireless station e) is a path between the wireless station a and the wireless station c (wireless station a → wireless station c), the wireless station c, and the wireless station e. And a path (wireless station c → wireless station e).

  Here, in the path between the wireless station a and the wireless station b, when the communication quality is lowered due to rain or the like, the wireless station a is based on the communication quality information between the wireless stations collected and held as needed. For example, a transmission route (wireless station a → wireless station c → wireless station e) is selected. Then, as shown in FIG. 8, the packet storing the information to be transmitted is transmitted to the wireless station e through the selected transmission route (wireless station a → wireless station c → wireless station e).

As a specific conventional technique, in a mesh-structured FWA, after variably measuring fluctuation factors such as traffic demand and radio link quality of each link, adaptive control of channel allocation and path load distribution to each link is performed. The technique is described in the following non-patent document 1 (see non-patent document 1).
Kishi Yoji et al., “Proposal of Mesh-type Multi-hop Wireless Access System with Adaptive Network Control Mechanism”, IEICE Transactions B, Vol. J85-B, no. 12, December 2002

  However, in the above-described prior art, a wireless station that is a source of information collects information to be transmitted in a packet and transmits it through a single selected transmission route among a plurality of transmission routes to a destination wireless station. For this reason, when there is a sudden rain in the selected transmission route, there is a problem in that packet loss occurs and communication quality deteriorates.

  Further, in the above-described prior art, each wireless station needs to notify each other of communication quality information as needed, so that the traffic amount in the entire FWA increases.

  The present invention solves the above-mentioned problems of the prior art, and suppresses a decrease in communication quality even when a packet loss occurs in a transmission route selected by a wireless station that is a source of information in a mesh-structured FWA. It is an object of the present invention to provide an FWA device, an information transmission method, a program for an FWA device, and a recording medium on which the program is recorded.

  In order to solve the above-described problems, according to the present invention, in an FWA apparatus provided in a wireless station, information to be transmitted is packetized, and an error correction code is added to the packet to perform error correction coding. Then, the error correction coded packet is divided, and the divided packet is transmitted through a plurality of transmission routes to the information transmission destination radio station.

  FIG. 1 is a diagram for explaining a packet created and divided by the FWA apparatus. First, as shown in FIG. 1A, the FWA apparatus packetizes information to be transmitted. Next, as shown in FIG. 1B, an error correction code is added to the packet to perform error correction coding. Then, as shown in FIG. 1C, the error-corrected encoded packet is divided. Finally, as shown in FIG. 1 (D), transmission route information, transmission route information, an ID number common to the divided packets, and an assembly order number indicating the assembly order of the divided packets are added to the divided packets. Each divided packet to which the ID number and the assembly order number are added is transmitted through the respective transmission route.

  The FWA device of the wireless station to which the information is transmitted receives packets having the same ID number transmitted to the device through a plurality of transmission routes, assembles the packets according to the assembly sequence number, and uses an error correction code. The correct information transmitted by the transmission source radio station is decoded. The FWA device of the wireless station to which the information is transmitted determines whether or not a packet loss has occurred based on the decoded information and information in the packet transmitted to the device itself through a plurality of transmission routes.

  According to the present invention, even when a packet loss occurs suddenly in some of the plurality of transmission routes, the wireless station that is the transmission destination of the information is transmitted by the wireless station that is the transmission source. You can get the right information. Further, according to the present invention, it is possible to determine on which transmission route the packet loss has occurred.

  That is, the present invention is an FWA apparatus in a fixed wireless access system having a plurality of transmission routes from a transmission source to a transmission destination of information, the packet generation unit for generating a packet of information to be transmitted, and the packet generation unit Error correction coding means for adding an error correction code to the received packet and performing error correction coding, packet division means for dividing the packet subjected to the error correction coding, and a divided packet divided by the packet division means A packet transmitting means for transmitting on the plurality of transmission routes, a packet receiving means for receiving the divided packets transmitted on the plurality of transmission routes, and assembling the divided packets received by the packet receiving means, and using an error correction code And a decoding means for decoding.

  Further, the present invention provides a packet loss determination unit that determines whether or not a packet loss has occurred in a divided packet received by the packet reception unit based on a decoding result by the decoding unit in the FWA device, and the packet loss An FWA apparatus comprising: a retransmission request unit that makes a retransmission request to a transmission source of a divided packet for which it is determined by the determination unit that a packet loss has occurred.

  Further, the present invention provides a packet distribution calculation for calculating an allocation distribution of divided packets to each transmission route based on communication quality information for each path constituting the plurality of transmission routes stored in advance in the FWA device. And the packet dividing means divides the error correction coded packet based on the allocation distribution calculated by the packet distribution calculating means.

  The present invention is also an information transmission method in a fixed wireless access system having a plurality of transmission routes from an information transmission source FWA device to an information transmission destination FWA device, wherein the information transmission source FWA device includes: A packet creation step for creating a packet of information to be transmitted; an error correction coding step in which an FWA device that is a transmission source of the information adds an error correction code to the created packet and performs error correction coding; and A packet dividing step of dividing the error-correction-encoded packet, and the information-transmitting FWA device transmits the divided divided packets on the plurality of transmission routes. A packet transmission step, and a packet in which the FWA device to which the information is transmitted receives divided packets transmitted by a plurality of transmission routes And Shin step, the destination FWA device of the information, assembles the received divided packet is information transmission method characterized in that it comprises a decoding step of decoding by using the error correction code.

  Further, according to the present invention, in the information transmission method, whether the packet loss has occurred in the divided packet received by the packet receiving step based on a decoding result by the decoding step by the FWA device to which the information is transmitted. A packet loss determination step for determining, and a retransmission request for the FWA device that is the transmission destination of the information to make a retransmission request to the FWA device that is the transmission source of the divided packet that is determined to have a packet loss in the packet loss determination step And a step of transmitting information.

  Further, the present invention provides the information transmission method in which the FWA device that is the transmission source of the information is connected to each transmission route based on communication quality information for each path that constitutes the plurality of transmission routes stored in advance. A packet distribution calculation step for calculating an allocation distribution of the divided packets, wherein the packet division step divides the error-corrected coded packet based on the allocation distribution calculated by the packet distribution calculation step. An information transmission method characterized by the above.

  Further, the present invention is a program for causing a computer of an FWA apparatus in a fixed wireless access system having a plurality of transmission routes from an information transmission source to a transmission destination to create a packet of information to be transmitted. Packet creating means for performing error correction coding by adding an error correction code to the packet created by the packet creating means, and packet dividing means for dividing the error-corrected coded packet A packet transmitting means for transmitting the divided packets divided by the packet dividing means on the plurality of transmission routes, a packet receiving means for receiving the divided packets transmitted by the plurality of transmission routes, and a reception by the packet receiving means. The decoded packet is assembled and decoded using an error correction code. A FWA device program to function as a unit.

  According to the present invention, in the FWA apparatus program, the computer determines whether or not a packet loss has occurred in the divided packet received by the packet receiving unit based on a decoding result by the decoding unit. And a program for an FWA apparatus for causing the packet loss determination unit to function as a retransmission request unit that makes a retransmission request to the transmission source of the divided packet determined to have occurred.

  Further, the present invention provides the FWA apparatus program, wherein the computer allocates divided packets to each transmission route based on communication quality information for each path constituting the plurality of transmission routes stored in advance. The packet dividing means divides the error correction coded packet based on the allocation distribution calculated by the packet distribution calculating means. Is a program for an FWA apparatus.

  The present invention also relates to a computer-readable recording medium that records a program for causing a computer of an FWA apparatus in a fixed wireless access system having a plurality of transmission routes from a transmission source to a transmission destination of the information. A packet creation means for creating a packet of information to be transmitted, an error correction coding means for adding an error correction code to the packet created by the packet creation means and performing error correction coding, and the error correction coding Packet dividing means for dividing the received packet, packet transmitting means for transmitting the divided packets divided by the packet dividing means onto the plurality of transmission routes, and packet reception for receiving the divided packets transmitted by the plurality of transmission routes And a divided packet received by the packet receiving means Vertical saw, a recording medium storing the FWA device program to function as a decoding means for decoding using the error correction code.

  Further, according to the present invention, in the recording medium on which the FWA apparatus program is recorded, the computer determines whether packet loss has occurred in the divided packet received by the packet receiving unit based on a decoding result by the decoding unit. Recorded packet loss judging means for judging, and a program for FWA apparatus for functioning as a retransmission request means for making a retransmission request to the transmission source of the divided packet judged that the packet loss has occurred by the packet loss judging means It is a recording medium.

  According to the present invention, in the recording medium on which the FWA apparatus program is recorded, the computer is connected to each transmission route based on the communication quality information for each path constituting the plurality of transmission routes stored in advance. A program for functioning as packet distribution calculation means for calculating allocation distribution of divided packets, wherein the packet division means is encoded with the error correction coding based on the allocation distribution calculated by the packet distribution calculation means. It is a recording medium on which a program for an FWA device, which is characterized by dividing a packet, is recorded.

  The FWA apparatus according to the present invention performs error correction encoding on a packet of information to be transmitted, divides the error correction encoded packet, and transmits the divided packets through a plurality of transmission routes. And the FWA apparatus which received each packet decodes the correct information which the FWA apparatus of the transmission source transmitted using the error correction code.

  Therefore, according to the present invention, in a mesh-structured FWA, even when packet loss occurs due to, for example, sudden rain in any of the information transmission routes, it is possible to suppress a decrease in communication quality. Therefore, according to the present invention, it is possible to improve communication quality in the entire FWA.

  Further, according to the present invention, it is possible to avoid the concentration (congestion) of packet transmission to a specific path.

  Further, according to the present invention, when a wireless station in the middle of a transmission route breaks down and a communication failure occurs in a specific path, the packet can be transmitted to the destination by bypassing the path in which the communication failure has occurred. it can. Further, according to the present invention, since information is distributed to a plurality of paths and transmitted to a transmission destination, the transmission capacity can be increased.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an example of the configuration of the FWA having a mesh configuration according to the embodiment of the present invention. The FWA shown in FIG. 2 includes a wireless station A, a wireless station B, a wireless station C, a wireless station D, and a wireless station E. Each radio station is equipped with the FWA apparatus according to the present invention. In the embodiment of the present invention, for example, the wireless station A performs error correction coding on a packet storing information to be transmitted and then divides the packet, and as shown in FIG. Transmit to station E.

  FIG. 3 is a diagram showing an example of the configuration of the FWA apparatus according to the present invention. In the FWA device 1, the packet creation unit 11 creates a packet of information to be transmitted. The error correction coding unit 12 adds an error correction code to the created packet and performs error correction coding on the packet.

  The transmission route selection unit 13 selects a plurality of transmission routes with no overlapping paths from the list of the plurality of transmission routes stored in the transmission route list table 25.

  The transmission route selection unit 13 can take various methods when selecting a plurality of transmission routes with no overlapping paths. For example, the transmission route selection unit 13 randomly selects one of a plurality of transmission route groups with no overlapping paths, or selects a transmission route group with the smallest number of wireless stations passing through. Further, the transmission route selection unit 13 selects, for example, a transmission route set with the least network traffic (communication amount) or a transmission route set with the best path communication quality (bit error rate, etc.). .

  The packet distribution calculation unit 14 selects each transmission route selected by the transmission route selection unit 13 based on the transmission rate and modulation method information for each path between the wireless stations stored in the wireless link state list table 24. To which packet is allocated. For example, a large amount of packets are allocated to a transmission route with a high transmission rate, and a small amount of packets are allocated to a transmission route with a low transmission rate.

  The packet division unit 15 divides the error correction encoded packet according to the packet allocation distribution calculated by the packet distribution calculation unit 14, and indicates the transmission route for transmitting the divided packet for each divided packet. Add route information.

  The ID number / assembly order number adding unit 16 adds an ID number common to the packets divided by the packet dividing unit 15 and an assembly order number, which is a number indicating the assembly order of the divided packets, for each divided packet.

  Then, the packet dividing unit 15 transmits the divided packet to the modulation / demodulation processing unit 17 that performs the packet modulation / demodulation processing.

  The divided packets transmitted to the modulation / demodulation processing unit 17 are distributed to a plurality of modulation / demodulation means 170 provided corresponding to the radio stations that the FWA device 1 directly transmits and receives packets.

  For example, when the FWA device 1 is an FWA device in the wireless station A shown in FIG. 2, the divided packet to which transmission route information “wireless station A → wireless station B → wireless station E” is added is transmitted to the wireless station B. It is distributed to the corresponding modulation / demodulation means 170.

  Each modulation / demodulation means 170 modulates the distributed divided packets. Further, the modulation / demodulation means 170 demodulates the packet information received by the antenna 18.

  Similarly to the modulation / demodulation means 170, the antenna 18 is also provided corresponding to a radio station where the FWA device 1 directly transmits and receives packets. For example, when the FWA apparatus 1 is an FWA apparatus in the radio station A shown in FIG. 2, the antennas 18 shown in FIG. 3 are used for transmission / reception with the radio station B, transmission / reception with the radio station C, and radio station D, respectively. It is provided for sending and receiving.

  The antenna 18 transmits the packet information modulated by the modulation / demodulation means 170 to the corresponding radio station. The antenna 18 receives packet information from the corresponding wireless station.

  The transmission route information analysis unit 19 analyzes the transmission route information in the packet information received from the modulation / demodulation processing unit 17 and determines whether or not the FWA device 1 is the final transmission destination of the packet.

  When the FWA device 1 is the final transmission destination of the received packet, the decoding unit 20 assembles a packet having the same ID number among the received divided packets based on the added assembly sequence number. Then, the decoding unit 20 decodes the assembled packet using an error correction code. The packet loss determination unit 21 determines whether or not a packet loss has occurred based on the information decoded by the decoding unit 20 and the packet information received from the modulation / demodulation processing unit 17.

  When packet loss occurs, the retransmission request unit 22 requests the packet transmission source wireless station to retransmit the packet.

  When the FWA device 1 is not the final destination of the received packet, the packet transfer control unit 23 performs packet transfer control processing based on the transmission route information added to the packet. For example, when the FWA device 1 is the FWA device in the wireless station B shown in FIG. 2 and the transmission route information added to the received packet is “wireless station A → wireless station B → wireless station E” The packet transfer control unit 23 performs control processing for transferring the packet to the wireless station E.

  The radio link state list table 24 stores information on the transmission rate and modulation method for each path between radio stations. The transmission route list table 25 stores information on a plurality of transmission routes of packets transmitted from the FWA device 1.

  FIG. 4 is a diagram illustrating an example of a transmission route list stored in the transmission route list table. For example, if the FWA device 1 is an FWA device in the wireless station A shown in FIG. 2, the transmission route list table 25 transmits information from the wireless station A to the wireless station E as shown in FIG. Transmission routes (9 types in the example of FIG. 4) and a transmission route number for identifying the transmission route are stored.

  FIG. 5 is a diagram illustrating an example of a data configuration of the radio link state list table. In the example illustrated in FIG. 5, the radio link state list table 24 stores information on a transmission rate per symbol (unit of time) and packet information modulation scheme for each path between radio stations.

  For example, the modulation method in the path (wireless station A → wireless station B) between wireless station A and wireless station B is QPSK (Quadrature Phase Shift Keying), and the transmission rate is 2 bits / sym. Also, the modulation scheme in the path between the radio station A and the radio station C (radio station A → radio station C) is 16QAM (Quadrature Amplitude Modulation), and the transmission rate is 4 bits / sym.

  FIG. 6 is a diagram showing an example of an operation processing flow when the FWA apparatus of the present invention is a packet transmission source. The FWA device 1 creates a packet of information to be transmitted (step S1), adds an error correction code to the created packet, and performs error correction coding on the packet (step S2). The FWA device 1 selects a plurality of transmission routes with no overlapping paths from the list of the plurality of transmission routes stored in the transmission route list table 25 (step S3).

  Next, the FWA device 1 calculates which distribution the packet is allocated to the selected transmission route based on the transmission rate and modulation method information for each path between the wireless stations in the wireless link state list table 24. (Step S4).

  Next, the FWA device 1 divides the error correction encoded packet according to the calculated packet allocation and distribution (step S5), and for each divided packet, the transmission route information of the divided packet and the common to the divided packets. An ID number and an assembly sequence number are added (step S6). Then, the FWA device 1 modulates the divided packet and transmits it on each transmission route based on the transmission route information added to each divided packet (step S7).

  FIG. 7 is a diagram showing an example of an operation processing flow when the FWA apparatus of the present invention receives a divided packet. When the FWA device 1 receives the divided packet (step S11), it analyzes the transmission route information added to the divided packet (step S12). Next, the FWA device 1 determines whether or not the device itself is the final transmission destination of the received divided packet (step S13). When the FWA device 1 determines that the own device is the final transmission destination of the received divided packet, the FWA device 1 assembles the divided packets having the same ID number from the received divided packets based on the assembly sequence number, and corrects the error. Decoding is performed using the code (step S14).

  By the decoding process in step S14, correct information transmitted from the transmission source radio station is obtained.

  Then, the FWA device 1 determines whether a packet loss has occurred based on the decoded information and the received fragmented packet information (step S15). If a packet loss has occurred, the FWA device 1 The wireless station is requested to retransmit the divided packet (step S16).

  If the FWA apparatus 1 is not the final transmission destination of the received divided packet, the FWA apparatus 1 performs transfer control processing of the divided packet based on the transmission route information added to the divided packet (step S17).

It is a figure explaining the packet produced / divided | segmented by FWA apparatus. It is an example of the structure of FWA of the mesh structure in embodiment of this invention. It is a figure which shows an example of a structure of FWA apparatus. It is a figure which shows an example of the transmission route list memorize | stored in the transmission route list table. It is a figure which shows an example of a data structure of a radio link state list table. It is a figure which shows an example of the operation | movement process flow in case a FWA apparatus is a transmission source of a packet. It is a figure which shows an example of the operation | movement processing flow when an FWA apparatus receives a division | segmentation packet. It is a figure which shows an example of FWA of a mesh structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 FWA apparatus 11 Packet preparation part 12 Error correction encoding part 13 Transmission route selection part 14 Packet allocation calculation part 15 Packet division part 16 ID number and assembly order number addition part 17 Modulation / demodulation processing part 170 Modulation / demodulation means 18 Antenna 19 Transmission route information analysis unit 20 Decoding unit 21 Packet loss determination unit 22 Retransmission request unit 23 Packet transfer control unit 24 Radio link state list table 25 Transmission route list table A, B, C, D, E, a, b, c, d E radio station

Claims (12)

An FWA apparatus in a fixed wireless access system having a plurality of transmission routes from a transmission source to a transmission destination of information,
A packet creation means for creating a packet of information to be transmitted;
Error correction coding means for adding an error correction code to the packet created by the packet creation means and performing error correction coding;
Packet dividing means for dividing the error-corrected encoded packet;
Packet transmitting means for transmitting the divided packets divided by the packet dividing means on the plurality of transmission routes;
A packet receiving means for receiving a divided packet transmitted by a plurality of transmission routes;
FWA apparatus comprising: decoding means for assembling the divided packets received by the packet receiving means and decoding them using an error correction code. The FWA device according to claim 1,
A packet loss judging means for judging whether a packet loss has occurred in the divided packet received by the packet receiving means based on a decoding result by the decoding means;
An FWA apparatus comprising: a retransmission request unit that makes a retransmission request to a transmission source of a divided packet that has been determined by the packet loss determination unit to have a packet loss. In the FWA apparatus according to claim 1 or 2,
Packet distribution calculation means for calculating the allocation distribution of divided packets to each transmission route based on communication quality information for each path constituting the plurality of transmission routes stored in advance,
The FWA apparatus characterized in that the packet dividing means divides the error correction coded packet based on the allocation distribution calculated by the packet distribution calculating means. An information transmission method in a fixed wireless access system having a plurality of transmission routes from an information transmission source FWA apparatus to an information transmission destination FWA apparatus,
A packet creation step in which the FWA device that is the transmission source of the information creates a packet of information to be transmitted;
An error correction coding step in which the FWA device that is the transmission source of the information adds an error correction code to the created packet and performs error correction coding;
A packet dividing step in which the FWA device that is the source of the information divides the error-corrected encoded packet;
A packet transmission step in which the FWA device that is the transmission source of the information transmits the divided divided packets on the plurality of transmission routes;
A packet receiving step in which the FWA device to which the information is transmitted receives a divided packet transmitted by a plurality of transmission routes;
The information transmission method, comprising: a decoding step in which the FWA device that is the transmission destination of the information assembles the received divided packet and decodes it using an error correction code. In the information transmission method of Claim 4,
A packet loss determination step in which the FWA device to which the information is transmitted determines whether or not a packet loss has occurred in the divided packet received in the packet reception step, based on the decoding result in the decoding step;
The FWA device that is the transmission destination of the information has a retransmission request step that makes a retransmission request to the FWA device that is the transmission source of the divided packet that has been determined that packet loss has occurred in the packet loss determination step. Information transmission method. In the information transmission method of Claim 4 or Claim 5,
A packet distribution calculation step in which the FWA device that is the transmission source of the information calculates the allocation distribution of the divided packets to each transmission route based on the communication quality information for each path constituting the plurality of transmission routes stored in advance; Have
The packet dividing step divides the error correction coded packet based on the allocation distribution calculated by the packet distribution calculating step. A program for causing a computer of an FWA apparatus in a fixed wireless access system having a plurality of transmission routes from a transmission source to a transmission destination of information,
The computer,
A packet creation means for creating a packet of information to be transmitted;
Error correction coding means for adding an error correction code to the packet created by the packet creation means and performing error correction coding;
Packet dividing means for dividing the error-corrected encoded packet;
Packet transmitting means for transmitting the divided packets divided by the packet dividing means on the plurality of transmission routes;
A packet receiving means for receiving a divided packet transmitted by a plurality of transmission routes;
A program for an FWA apparatus for causing a divided packet received by the packet receiving means to function and function as a decoding means for decoding using an error correction code. In the FWA apparatus program according to claim 7,
The computer,
A packet loss judging means for judging whether a packet loss has occurred in the divided packet received by the packet receiving means based on a decoding result by the decoding means;
A program for an FWA apparatus for causing a retransmission request unit to make a retransmission request to a transmission source of a divided packet for which packet loss is determined to have occurred by the packet loss determination unit. In the FWA apparatus program according to claim 7 or 8,
The computer,
A program for functioning as packet distribution calculation means for calculating allocation distribution of divided packets to each transmission route based on communication quality information for each path constituting the plurality of transmission routes stored in advance,
The FWA device program, wherein the packet dividing means divides the error correction coded packet based on the allocation distribution calculated by the packet distribution calculating means. A computer-readable recording medium that records a program to be executed by a computer of an FWA apparatus in a fixed wireless access system having a plurality of transmission routes from a transmission source to a transmission destination of information,
The computer,
A packet creation means for creating a packet of information to be transmitted;
Error correction coding means for adding an error correction code to the packet created by the packet creation means and performing error correction coding;
Packet dividing means for dividing the error-corrected encoded packet;
Packet transmitting means for transmitting the divided packets divided by the packet dividing means on the plurality of transmission routes;
A packet receiving means for receiving a divided packet transmitted by a plurality of transmission routes;
A recording medium on which is recorded a program for an FWA device for functioning as decoding means for assembling the divided packets received by the packet receiving means and decoding them using error correction codes. In the recording medium which recorded the program for FWA devices of Claim 10,
The computer,
A packet loss judging means for judging whether a packet loss has occurred in the divided packet received by the packet receiving means based on a decoding result by the decoding means;
A recording medium on which is recorded a program for an FWA apparatus for functioning as a retransmission request unit that makes a retransmission request to a transmission source of a divided packet for which packet loss is determined to have occurred by the packet loss determination unit. In the recording medium which recorded the program for FWA devices of Claim 10 or Claim 11,
The computer,
A program for functioning as packet distribution calculation means for calculating allocation distribution of divided packets to each transmission route based on communication quality information for each path constituting the plurality of transmission routes stored in advance,
The packet dividing means divides the error-correction encoded packet based on the allocation distribution calculated by the packet distribution calculating means. A recording medium on which a program for FWA apparatus is recorded.

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