JP2013030955A - Communication apparatus, communication system, transmission method and alignment method of received frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system capable of communicating data of the higher priority at the higher speed using a plurality of lines, and aligning the data on a receiving side in the same sequence as on a transmission side.SOLUTION: In a communication apparatus 10a, a sequence information insertion part 12a assigns, to each frame to be communicated, priority information indicating priority set on the frame and sequence information (sequence number) indicating an alignment order of the frame for each priority of the frame. A sort control part 13a sorts the frame assigned with the priority information and the sequence information into any of the plurality of lines according to the priority of the frame assigned with the priority information and the sequence information so as to give more priority to the frame of higher priority. A modulation and transmission parts 15a-1 and 15a-2 transmit the frame assigned with the priority information and the sequence information using the line into which the sort control part 13a sorts the frame.

Description

The present invention relates to a communication device, a communication system, a transmission method for the communication device, and a received frame alignment method for the communication device.

In wireless communication such as a point-to-point (PP) wireless communication system that transmits IP packets, data that requires real-time properties such as voice and video is increased with low delay and less fluctuation, and the communication capacity is increased. May be required. Therefore, a technology is known in which two communication devices aggregate a plurality of lines and construct a virtual single logical line for communication to improve communication capacity.
Here, when performing frame communication or packet communication using a plurality of lines, one data is distributed and transmitted to a plurality of lines on the transmission side in units of communication frames or buckets on the transmission side, and from a plurality of lines on the reception side. Collect received communication frames or packets and reconstruct the original data. A mechanism for guaranteeing the frame order or packet order between the transmitting side and the receiving side in order to prevent a communication failure due to a mismatch between the frame order or packet order before distribution on the transmitting side and the frame order or packet order after collection on the receiving side. Is required. As described above, in order to arrange frames and packets on the receiving side in the same order as on the transmitting side, a method for transmitting the frames or packets with order information is known.

For example, in the frame distribution method described in Patent Document 1, in the frame distribution method to lines in line aggregation communication, frames are transferred to each line so that the data amount of frames loaded in the transmission queue of each line is equalized. Distribute. Further, the order information of the frames is inserted into the frame to be transmitted, and the order of the received frames is corrected based on the order information extracted from the frames received by the receiving system.
By providing such a distribution method and order information insertion / extraction function, it is said that the communication bandwidth of the aggregated line can be used effectively and the order of communication frames can be guaranteed.

The packet order control method described in Patent Document 2 is a packet order control method in a communication system that realizes a broadband communication line using a plurality of communication lines of different types and characteristics, and a plurality of communication lines A packet is received for each reception interface corresponding to each, and each determination unit controls the order of received packets based on a series of SEQNO and IF-specific SEQNO included in the reception packet.
As a result, it is said that it is possible to obtain a packet order control method capable of reassembling packets without being affected by the type and characteristics of the communication line, while obtaining the effect of wide band.

  In addition, in a network in which data to be preferentially transmitted with emphasis on the real-time nature of service (for example, video data and audio data to be distributed by streaming) and low priority data (for example, e-mail data) are mixed, There is a method of classifying on the basis of type, performing communication by distinguishing priority data and low priority data, and ensuring a predetermined quality. Control for realizing a method for performing communication according to the priority of data in this way is called priority control or QoS (Quality Of Service) control.

In relation to this priority control, the multi-antenna transmission system described in Patent Document 3 has a packet type identification circuit for identifying the QoS class of the user traffic sequence for each user packet on the transmission side, and the user packet is a delayed high priority class. If there is a band that can be transferred by one transmitting antenna, the average SIR information for each transmitting antenna is the best antenna or the one with the shortest queue length from the queue length of the delay high priority class memory in the retransmission control circuit. A distribution control circuit that determines which transmission antenna to transmit by selecting, and a distribution circuit that distributes transmission antennas based on an antenna selection signal from the distribution control circuit are provided.
Thereby, when applied to a communication network in which a plurality of QoS class user packets are mixedly transmitted, the transmission delay of the user packets of the delay high priority class is improved, due to the instantaneous interruption of the user traffic of the delay high priority class, etc. It is said that the quality will be improved.

Japanese Patent Laid-Open No. 2002-9866 JP 2009-239444 A JP 2006-229588 A

However, the frame distribution method described in Patent Document 1 equalizes the amount of data flowing through each line. For this reason, when the transmission capacity differs for each line, the frame distribution method described in Patent Document 1 cannot be applied as it is.
Further, Patent Document 1 and Patent Document 2 do not indicate that processing according to the priority of communication data is performed. Therefore, even if the frame distribution method described in Patent Document 1 or the packet order control method described in Patent Document 2 is used, priority control cannot be realized.

  In addition, the multi-antenna transmission system described in Patent Document 3 distributes user packets of a delay high priority class to one transmission antenna. For this reason, even when there is a vacancy in another radio channel (a radio channel other than a transmission antenna assigned a delay high priority class), packets of a delay high priority class can be transmitted and received using the other radio channel. I can't. In other words, high priority data cannot be communicated at higher speed using a plurality of lines.

  An object of the present invention is to provide a communication device, a communication system, a transmission method, and a reception frame alignment method that can solve the above-described problems.

  The present invention has been made to solve the above-described problem, and the communication device according to one aspect of the present invention provides priority information indicating the priority set for each frame to be communicated. A sequence information adding unit that assigns sequence information that is information indicating the arrangement order of the frames for each frame priority, and the priority information and sequence information that are assigned the priority information and the sequence information. In accordance with the priority of the frame to which the priority is given, the higher priority frame is preferentially distributed to any of a plurality of lines, and the frame to which the priority information and the sequence information are given, And a transmission unit that transmits using a line distributed by the distribution control unit.

  In addition, the communication device according to one aspect of the present invention is assigned priority information indicating the priority of the frame and sequence information that is information indicating the order of the frames for each priority of the frame, and distributes the information to a plurality of lines. A receiving unit that receives a frame to be transmitted, and an aggregation control unit that arranges frames received with the priority information and sequence information received by the receiving unit for each priority according to an arrangement order indicated by the sequence information; It is characterized by comprising.

  Further, a communication system according to an aspect of the present invention is a communication system including a first communication device and a second communication device, and the first communication device performs communication with respect to each frame to be communicated. A sequence information adding unit that gives priority information indicating the priority set for the frame, and sequence information that is information indicating the arrangement order of the frames for each priority of the frame, and the priority information and the sequence information. According to the priority of the frame to which the priority information and the sequence information are assigned, the distribution control unit that distributes the assigned frame to one of a plurality of lines preferentially, and the priority A transmission unit for transmitting the frame to which the degree information and the sequence information are assigned using a line distributed by the distribution control unit, and the second communication device Is a receiving unit that receives the frame with the priority information and sequence information that is distributed to the plurality of lines and transmitted from the first communication device, and the priority information received by the receiving unit and And an aggregation control unit that arranges the frames to which the sequence information is assigned for each of the priorities according to the arrangement order indicated by the sequence information.

  The transmission method according to an aspect of the present invention is a transmission method of a communication apparatus, and for each frame to be communicated, priority information indicating a priority set in the frame, and priority of the frame A sequence information adding step for adding sequence information, which is information indicating the arrangement order of frames for each time, and a frame to which the priority information and sequence information are assigned, and a frame to which the priority information and sequence information are assigned The distribution control unit distributes a distribution control step in which a higher priority frame is allocated to any of a plurality of lines according to the priority of the frame, and a frame to which the priority information and the sequence information are assigned. And a transmission step of transmitting using the connected line.

  A received frame alignment method according to an aspect of the present invention is a received frame alignment method for a communication apparatus that receives a frame as a communication target, and includes priority information indicating a priority of a frame and a frame for each priority of the frame. Sequence information, which is information indicating the order of arrangement, and a reception step of receiving a frame distributed and transmitted to a plurality of lines, and the priority information and sequence information received by the reception unit An aggregation control step of arranging the frames for each of the priorities according to the arrangement order indicated by the sequence information.

  According to the present invention, high-priority data can be communicated at higher speed using a plurality of lines, and the received data can be arranged in the same order as that on the transmission side.

It is a schematic block diagram which shows the function structure of the communication system in one Embodiment of this invention. It is a schematic block diagram which shows the function structure of the sequence information insertion part in this embodiment, and a distribution control part. It is a schematic block diagram which shows the function structure of the aggregation control part in the embodiment. It is a data structure figure which shows schematic structure of the transmission frame with priority information in the embodiment. In the same embodiment, it is explanatory drawing which shows the example from which a line selection control part takes out a received frame from a buffer. 5 is a flowchart illustrating a processing procedure in which a sequence information insertion unit inserts priority information and a sequence number into a transmission frame and a distribution control unit stores the frame in a queue in the embodiment. 4 is a flowchart illustrating a processing procedure in which a high priority frame counter unit and a low priority frame counter unit update a counter value in the embodiment. 5 is a flowchart illustrating a processing procedure in which a distribution control unit distributes a transmission frame with sequence information to a wireless line in the embodiment. 5 is a flowchart illustrating a processing procedure in which an aggregation control unit aggregates received frames in the embodiment. In the embodiment, the high priority frame expected value matching unit determines whether the priority information and the sequence number output from the reception buffer unit match the expected value indicated by the high priority expected value counter. It is a flowchart which shows. 4 is a flowchart illustrating a processing procedure in which a line selection control unit acquires and outputs extracted data in the embodiment.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic block diagram showing a functional configuration of a communication system according to an embodiment of the present invention. In the figure, the communication system 1 includes a communication device 10a and a communication device 10b. The communication device 10a includes a protocol processing unit 11a, a sequence information insertion unit (sequence information adding unit) 12a, a distribution control unit 13a, multiplexing units 14a-1 and 14a-2, and modulation / transmission units 15a-1 and 15a. -2, receiving / demodulating units 16a-1 and 16a-2, extracting units 17a-1 and 17a-2, an aggregation control unit 18a, and a sequence information deleting unit 19a. The communication device 10b includes a protocol processing unit 11b, a sequence information insertion unit 12b, a distribution control unit 13b, multiplexing units 14b-1 and 14b-2, modulation / transmission units 15b-1 and 15b-2, Demodulating units 16b-1 and 16b-2, extracting units 17b-1 and 17b-2, an aggregation control unit 18b, and a sequence information deleting unit 19b are provided.

The communication device 10a and the communication device 10b communicate via a plurality of wireless lines (wireless lines # 1 and # 2 in FIG. 1). Hereinafter, the direction of transmission from the communication device 10a to the communication device 10b is referred to as “uplink”, and the direction of transmission from the communication device 10b to the communication device 10a is referred to as “downlink”.
In the present embodiment, the configuration and operation of the communication device 10b are the same as the configuration and operation of the communication device 10a. Hereinafter, the configuration and operation of the communication device 10a will be described.
However, the application range of the present invention is not limited to a communication system including a plurality of similar communication devices. For example, the present invention may be applied to an uplink in a communication system, and another communication method may be applied to a downlink. In this case, the configuration of the communication apparatus differs between the uplink transmission side and the reception side, but the present invention can also be applied to such a case.

Note that “# 1” and “# 2” shown in the figure indicate a part related to the line # 1 and a part related to the line # 2.
However, the application range of the present invention is not limited to the case where the number of lines between the communication apparatuses is two, but may be two or more.

  Hereinafter, the multiplexing units 14a-1 and 14a-2 are collectively referred to as "multiplexing unit 14a". Similarly, the modulation / transmission units 15a-1 and 15a-2 are collectively referred to as “modulation / transmission unit 15a”, and the reception / demodulation units 16a-1 and 16a-2 are collectively referred to as “reception / demodulation”. Part 16a ", and the extraction parts 17a-1 and 17a-2 are collectively referred to as" extraction part 17a ".

  The protocol processing unit 11a realizes the function of the data link layer (or the data link layer and the network layer) of the OSI (Open System Interconnection) reference model. For example, the protocol processing unit 11a converts packet data input from the outside of the communication device 10a into a MAC frame format defined by IEEE 802.3, and outputs the MAC frame format to the sequence information insertion unit 12a as a transmission frame. In addition, the protocol processing unit 11a converts the received frame output from the sequence information deletion unit 19a into a data format that matches the external interface of the communication device 10a, and outputs the converted data to the outside of the communication device 10a.

Note that the frame here is data handled as one unit when the communication device 10a transmits data. Here, the present invention does not depend on a specific frame. That is, various types of frames can be adopted as the frame generated by the protocol processing unit 11a.
Further, the transmission frame here is a frame to be transmitted by the communication device 10a, and the reception frame here is a frame received by the communication device 10a.

  The sequence information insertion unit 12a determines the priority of the transmission frame output from the protocol processing unit 11a. The priority here is a priority when the communication device 10a transmits a frame. The sequence information insertion unit 12a determines the priority of each transmission frame as either “high” or “low”, and the communication device 10a gives priority to the transmission frame with the priority “high” (ie, Transmit (prior to transmission frames with low priority).

Then, the sequence information insertion unit 12a inserts information indicating the priority of the determination result (hereinafter referred to as “priority information”) and sequence information into the transmission frame output from the protocol processing unit 11a.
The sequence information here is information indicating the arrangement order of frames set for each frame priority. This sequence information is used for arranging frames on the receiving side in the same order as on the transmitting side.

  In the present embodiment, the sequence information insertion unit 12a includes a counter (sequence number counter) for each priority. Then, the sequence information inserting unit 12a inserts the value (sequence number) held by the sequence number counter as sequence information together with the priority information at the head of the transmission frame output from the protocol processing unit 11a. Then, the sequence information insertion unit 12a outputs the transmission frame in which the priority information and the sequence number are inserted to the distribution control unit 13a.

As described above, the sequence information insertion unit 12a has, for each frame to be communicated, priority information indicating the priority set for the frame and information indicating the arrangement order of the frames for each frame priority. Is given sequence information.
Hereinafter, a frame in which priority information and a sequence number are inserted is referred to as a “transmission frame with sequence information” on the transmission side and a “reception frame with sequence information” on the reception side.

  The distribution control unit 13a distributes the frame to which the sequence information is assigned to one of a plurality of lines. That is, the distribution control unit 13a transmits the transmission frame with sequence information output from the sequence information insertion unit 12a based on the modulation scheme designation information output from the extraction unit 17a to either the radio channel # 1 or # 2. Decide whether to send to. Then, the distribution control unit 13a determines the multiplexing unit 14a of the determined radio channel (that is, the multiplexing unit 14a-1 when the radio channel # 1 is determined, and the multiplexing unit 14a-2 when the radio channel # 2 is determined. ), The transmission frame with sequence information is output as multiplexing target data (data to be multiplexed).

  The modulation scheme designation information here is information indicating a modulation scheme used when the modulation / transmission unit 15a transmits a radio signal. That is, the modulation / transmission units 15a-1 and 15a-2 transmit a radio signal by an adaptive modulation scheme that selects a modulation scheme according to the state (quality) of the radio channel, and the modulation scheme designation information A modulation scheme used when transmitting a radio signal for each of the transmission units 15a-1 and 15a-2 is shown.

This modulation scheme designation information is generated by the reception / demodulation unit (reception / demodulation units 16b-1 and 16b-2 here) included in the opposite communication device (here, communication device 10b), and the transmission side communication device ( Here, it is transmitted to the communication device 10a).
The reception / demodulation unit 16b-1 acquires information indicating the state of the radio line # 1 (for example, channel state information (CSI) or reception error rate information), and based on the acquired information Thus, the modulation scheme used by the modulation / transmission unit 15a-1 is determined.
Specifically, the reception / demodulation unit 16b-1 is configured such that when the state of the radio line # 1 is good, a multi-value number is used such as a communication method having a relatively large transmission capacity (for example, 8PSK (Phase-Shift Keying)). Communication method with a large value). On the other hand, when the state of the wireless line # 1 is deteriorating due to rain attenuation or the like, the receiving / demodulating unit 16b-1 has a relatively small transmission capacity but a relatively high tolerance for the deterioration of the state of the wireless line. (For example, a communication method with a small multi-value number such as 4PSK).
Then, the reception / demodulation unit 16b-1 generates a modulation scheme determination result indicating the determined communication scheme. The modulation scheme determination result is transmitted to the extraction unit 17a-1 via the multiplexing unit 14b-1, the modulation / transmission unit 15b-1, and the reception / demodulation unit 16a-1. Then, the extraction unit 17a-1 uses the obtained modulation scheme determination result as modulation scheme designation information for the modulation / transmission unit 15a-1, and uses the distribution control unit 13a, the multiplexing unit 14a-1, and the modulation / transmission unit 15a- 1 and output.
Similarly, the reception / demodulation unit 16b-2 determines the modulation method used by the modulation / transmission unit 15a-2 based on the information indicating the state of the radio channel # 2, and the modulation method determination result indicating the determined modulation method Is generated. Then, the extraction unit 17a-2 acquires the modulation scheme determination result, and as modulation scheme designation information for the modulation / transmission unit 15a-2, the distribution control unit 13a, the multiplexing unit 14a-2, and the modulation / transmission unit 15a. Output to -2.

  As described above, the distribution control unit 13a is configured so that the modulation / transmission unit 15a determines the priority information and the priority information and the sequence information according to the state of the wireless channel that transmits the frame to which the priority information and sequence information are added (transmission frame with sequence information). Controls distribution of frames to which sequence information is assigned to each wireless line.

Further, the distribution control unit 13a distributes the higher priority frame to any one of a plurality of lines according to the priority of the frame to which the priority information and the sequence information are given. For example, the distribution control unit 13a includes a buffer for temporarily storing frames, and stores (writes) the transmission frames with a sequence output from the sequence information insertion unit 12a in the buffer. Then, the sequence information insertion unit 12a distributes the frames with high priority among the frames stored in the buffer, and outputs the frames to the multiplexing unit 14a that is the distribution destination. The distribution control unit 13a distributes all the frames with high priority stored in the buffer, distributes the frames with low priority stored in the buffer, and outputs them to the multiplexing unit 14a as the distribution destination.
The distribution control unit 13a preferentially processes the higher priority frame (outputs to the distribution and multiplexing unit 14a), thereby ensuring the communication speed of the high priority frame (for example, the communication speed guaranteed in QoS). Secure).

The multiplexing unit 14a-1 multiplexes the data to be multiplexed output from the distribution control unit 13a and the modulation scheme determination result output from the reception / demodulation unit 16a-1 into a radio frame format to obtain a transmission baseband signal. And output to the modulation / transmission unit 15a.
At that time, the multiplexing unit 14a-1 is a multiplexing method according to the modulation scheme designation information output from the extraction unit 17a-1 (as described above, the modulation scheme determination result generated by the reception / demodulation unit 16b-1). Perform multiplexing. For example, when the capacity of the container used by the multiplexing unit 14a-1 differs according to the transmission rate of the modulation / transmission unit 15a-1, the multiplexing unit 14a-1 uses the transmission rate designated by the modulation scheme designation information. The multiplexing target data that fits in the container capacity and the modulation method determination result are multiplexed.
Here, the modulation scheme determination result multiplexed by the multiplexing unit 14a-1 is used as modulation scheme designation information for designating the modulation scheme used by the modulation / transmission unit 15b-1 of the communication device 10b.

  Similar to the multiplexing unit 14a-1, the multiplexing unit 14a-2 converts the multiplexing target data output from the distribution control unit 13a and the modulation scheme determination result output from the reception / demodulation unit 16a-1 into a radio frame format. Multiplexed and output to the modulation / transmission unit 15a as a transmission baseband signal.

The modulation / transmission unit 15a transmits (wireless transmission) the frame to which the priority information and the sequence information are assigned using the line distributed by the distribution control unit 13a.
Specifically, the modulation / transmission unit 15a-1 determines the transmission baseband signal output from the multiplexing unit 14a-1 according to the modulation scheme designation information output from the extraction unit 17a-1 (multiplex target data and modulation scheme determination). Data obtained by multiplexing the result into a radio frame format) and further converting the data into a signal of a transmission frequency band to generate a transmission signal. Then, the modulation / transmission unit 15a-1 transmits the generated transmission signal as a wireless communication signal to the opposite communication device (communication device 10b) via a wireless line.
Similarly, the modulation / transmission unit 15a-2 modulates the transmission baseband signal output from the multiplexing unit 14a-2 in accordance with the modulation scheme designation information output from the extraction unit 17a-2, and further transmits the transmission frequency band. It converts into a signal and produces | generates a transmission signal. Then, the modulation / transmission unit 15a-2 transmits the generated transmission signal as a wireless communication signal to the opposite communication device (communication device 10b) via a wireless line.

The receiving / demodulating unit 16a is provided with sequence information that is information indicating the arrangement order of frames for each frame priority, and receives frames transmitted by being distributed to a plurality of lines. Specifically, the reception / demodulation unit 16a converts a wireless communication signal transmitted from the opposite communication device (communication device 10b) through a wireless line into a signal having a baseband frequency, and further demodulates the signal. The received baseband signal is output to the extraction unit 17a. Here, the radio communication signal received by the reception / demodulation unit 16a includes a frame to which sequence information is added (inserted), similarly to the radio communication signal transmitted by the modulation / transmission unit 15a. The frame received by the reception / demodulation unit 16a as a wireless communication signal is distributed and transmitted to a plurality of lines (# 1 and # 2), similarly to the wireless communication signal transmitted by the modulation / transmission unit 15a.
Also, the reception / demodulation unit 16a determines the state of the radio line from the received radio signal transmitted from the opposite communication device (communication device 10b), determines the optimum modulation method for downlink transmission, and performs modulation. It outputs to the multiplexing part 14a as a system determination result.

  The extraction unit 17a extracts a reception frame with sequence information from the reception baseband signal output from the reception / demodulation unit 16a, and outputs the received frame as extracted data to the aggregation control unit 18a. Further, the extraction unit 17a extracts modulation scheme designation information from the received baseband signal and outputs it to the distribution control unit 13a, the multiplexing unit 14a, and the modulation / transmission unit 15a.

When the extraction data is output from each of the extraction unit 17a-1 and the extraction unit 17a-2, the aggregation control unit 18a extracts the output output from the extraction unit 17a-1 based on the sequence information included in the extraction data. The data and the extracted data output from the extraction unit 17a-2 are rearranged and output to the sequence information deletion unit 19a as a reception frame with sequence information.
In this way, the aggregation control unit 18a arranges the frames to which the priority information and the sequence information are given, received by the reception / demodulation unit 16a, for each priority according to the arrangement order indicated by the sequence information.

  The sequence information deletion unit 19a deletes the sequence information from the reception frame with sequence information output from the aggregation control unit 18a, and outputs it as a reception frame to the protocol processing unit 11a.

Next, the sequence information insertion unit 12a and the distribution control unit 13a will be described in more detail with reference to FIG.
FIG. 2 is a schematic block diagram illustrating functional configurations of the sequence information insertion unit 12a and the distribution control unit 13a. In the figure, the sequence information insertion unit 12a includes a priority determination unit 121a, a high priority frame counter unit 122a, a low priority frame counter unit 123a, and a sequence number insertion unit 124a. Further, the distribution control unit 13a includes a high priority queue unit 131a, a low priority queue unit 132a, a distribution ratio determination unit 133a, and a line selection control unit 134a.

The priority determination unit 121a determines the transmission frame transmission priority (high or low) output from the protocol processing unit 11a based on a predetermined determination criterion, and uses the high priority frame counter unit as a priority determination result. 122a, the low priority frame counter unit 123a, and the sequence number insertion unit 124a.
The high-priority frame counter unit 122a has a counter for generating a sequence number of the high-priority frame. Based on the priority determination result output from the priority determination unit 121a, the count-up operation or value holding is performed. The operation is performed, and the result is output as a high priority frame sequence number to the sequence number insertion unit 124a.
The low-priority frame counter unit 123a has a counter for generating a sequence number of a low-priority frame. Based on the priority determination result output from the priority determination unit 121a, the count-up operation or value holding is performed. The operation is performed, and the result is output as a low priority frame sequence number to the sequence number insertion unit 124a.

  The sequence number insertion unit 124a outputs the priority determination result output from the priority determination unit 121a and the sequence number output from the high priority frame counter unit 122a or the low priority frame counter unit 123a from the protocol processing unit 11a. Is inserted at the beginning of the transmitted frame. More specifically, the sequence number insertion unit 124a, when the priority determination result output from the priority determination unit 121a indicates high priority (that is, priority “high”), The high priority frame sequence number output from the high priority frame counter unit 122a is inserted at the head of the transmission frame. On the other hand, when the priority determination result output from the priority determination unit 121a indicates low priority (that is, priority “low”), the sequence number insertion unit 124a determines the priority determination result and the low priority frame counter. The low priority frame sequence number output from the unit 123a is inserted at the head of the transmission frame. Then, the sequence number insertion unit 124a outputs the transmission frame in which the priority determination result and the sequence number are inserted to the distribution control unit 13a as a transmission frame with sequence information.

The high-priority queue unit 131a has a FIFO (First In First Out) type memory. Among the transmission frames with sequence information output from the sequence information insertion unit 12a (sequence number insertion unit 124a), the high-priority queue unit 131a Store. Hereinafter, the memory included in the high priority queue unit 131a is referred to as a “high priority queue”.
Similarly to the high priority queue, the low priority queue unit 132a is a FIFO memory, and stores a low priority frame among transmission frames with sequence information output from the sequence information insertion unit 12a (sequence number insertion unit 124a). To do. Hereinafter, the memory included in the low priority queue unit 132a is referred to as a “low priority queue”.

  The allocation ratio determining unit 133a is based on the modulation scheme designation information output from the extraction unit 17a-1 of the radio channel # 1 and the modulation scheme designation information output from the extraction unit 17a-2 of the radio channel # 2. The ratio of the number of frames to be allocated to each line is determined, and is output to the line selection control unit 134a as the distribution number ratio. At that time, the distribution ratio determining unit 133a determines the distribution number ratio similar to the ratio between the transmission capacity of the wireless line # 1 and the transmission capacity of the wireless line # 2. Accordingly, it is possible to prevent the transmission frames from being concentrated on one of the radio lines, and to use each line efficiently.

The line selection control unit 134a extracts (reads and deletes from the queue) the transmission frame with sequence information from the high priority queue unit 131a or the low priority queue unit 132a. Also, the line selection control unit 134a determines which of the radio lines # 1 and # 2 is to be transmitted based on the distribution ratio output from the distribution ratio determination unit 133a, and the determined radio line multiplexing unit In 14a, the transmission frame with sequence information extracted from the high priority queue unit 131a or the low priority queue unit 132a is output as multiplexing target data.
Here, the line selection control unit 134a preferentially extracts the transmission frame with sequence information from the high priority queue unit 131a. For example, when the high priority queue unit 131a stores a transmission frame with sequence information, the line selection control unit 134a always extracts the transmission frame with sequence information from the high priority queue unit 131a and stores it in the high priority queue unit 131a. If there is no transmission frame with sequence information and the low priority queue unit 132a stores a transmission frame with sequence information, the transmission frame with sequence information is taken out from the low priority queue unit 132a.
In this way, the line selection control unit 134a preferentially takes out the transmission frame with sequence information from the high priority queue unit 131a, so that the communication device 10a preferentially selects a frame with a higher priority (than a frame with a lower priority). It is possible to secure a transmission rate of a frame having a high priority by transmitting it first.

Next, the aggregation control unit 18a will be described in more detail with reference to FIG.
FIG. 3 is a schematic block diagram illustrating a functional configuration of the aggregation control unit 18a. In the figure, the aggregation control unit 18a includes reception buffer units 181a-1 and 181a-2, a high priority frame expected value matching unit 182a, a low priority frame expected value matching unit 183a, and a line selection control unit 184a. To do.
Hereinafter, the reception buffer units 181a-1 and 181a-2 are collectively referred to as “reception buffer unit 181a”.

  The reception buffer unit 181a is arranged for each wireless line. The reception buffer unit 181a-1 for the line # 1 stores the extracted data output from the extraction unit 17a-1 for the line # 1 in its own buffer, and converts the sequence information included in the extracted data into the high priority frame. The data is output to the expected value matching unit 182a, the low priority frame expected value matching unit 183a, and the line selection control unit 184a. Similarly, the reception buffer unit 181a-2 of the line # 2 stores the extracted data output from the extraction unit 17a-2 of the line # 2 in its own buffer, and the sequence information included in the extracted data is The data is output to the high priority frame expected value matching unit 182a, the low priority frame expected value matching unit 183a, and the line selection control unit 184a.

The high priority frame expected value matching unit 182a has a counter for generating an expected value (hereinafter referred to as a “high priority expected value counter”), and the expected value indicated by the counter and the reception buffer unit 181a output the expected value. The sequence information is collated, and the collation result is output to the line selection control unit 184a as the high priority frame expected value collation result. The expected value here is a value indicating the sequence number of the frame to be acquired next by the line selection control unit 184a for each priority. That is, the high priority frame expected value indicates the sequence number of the next high priority frame that the line selection control unit 184a should acquire, and the low priority frame expected value indicates the low priority frame that the line selection control unit 184a should acquire next. Indicates the sequence number.
Like the high priority frame expected value matching unit 182a, the low priority frame expected value matching unit 183a includes a counter (hereinafter referred to as a “low priority expected value counter”) for generating an expected value. The expected value shown is compared with the sequence information output from the reception buffer unit 181a, and the verification result is output to the line selection control unit 184a as the low priority frame expected value verification result.

  The line selection control unit 184a uses the extracted frame output from the reception buffer unit 181a-1 of the line # 1 or the line # 2 based on the high priority frame expected value matching result and the low priority frame expected value matching result. One of the extracted frames output from the reception buffer unit 181a-2 is selected and output to the sequence information deletion unit 19a as a reception frame with sequence information.

Next, with reference to FIG. 4 and FIG. 5, description will be given of insertion of priority information and a sequence number into a transmission frame by sequence number insertion unit 124a, and rearrangement of received frames by line selection control unit 184a.
FIG. 4 is a data structure diagram showing a schematic structure of a transmission frame with priority information. As shown in the figure, in the transmission frame with priority motion information, priority information and a sequence number are inserted at the head of the transmission frame output from the protocol processing unit 11a.
As described above, the sequence number here is a number indicating the arrangement order of frames for each priority. Using the priority information and the sequence number, the receiving communication apparatus can reproduce the same frame arrangement order as the transmitting side for each priority.

  Note that the method of adding priority information and sequence number to the transmission frame by the sequence number insertion unit 124a is not limited to the method of inserting it at the head of the transmission frame as shown in FIG. Various methods that can be acquired in association with sequence numbers can be used. For example, when there is an unused area in the header of the transmission frame, the sequence number insertion unit 124a may write the priority information and the sequence number in the unused area.

FIG. 5 is an explanatory diagram illustrating an example in which the line selection control unit 184a extracts a received frame from the buffer.
In FIG. 9A, a high priority frame having a sequence number 152 is stored at the head of the reception buffer unit 181a-1 of the line # 1. In addition, a high priority frame having a sequence number 153 is stored at the head of the reception buffer unit 181a-2 of the line # 2. The line selection control unit 184a has already taken out the high priority frame up to the sequence number 151 and the low priority frame up to the sequence number 75 from the buffer.

  In this case, the high priority frame expected value matching unit 182a stores 152, which is the next sequence number of the high priority frame already extracted by the line selection control unit 184a, as an expected value in the counter. The high-priority frame expected value matching unit 182a determines whether the frame stored at the head of each of the reception buffer unit 181a-1 and the reception buffer unit 181a-2 is a high-priority frame having the same sequence number as the expected value. Judge whether or not. Then, the high-priority frame expected value matching unit 182a detects that the top frame of the reception buffer unit 181a-1 is a high-priority frame having the same sequence number as the expected value, and the expected value matching result (high-priority frame) Information indicating the line number # 1 is output to the line selection control unit 184a as an expected value comparison result).

  On the other hand, the low-priority frame expected value matching unit 183a stores 76, which is the next sequence number of the low-priority frame already extracted by the line selection control unit 184a, as an expected value. The low-priority frame expected value matching unit 183a determines whether the frame stored at the head of each of the reception buffer unit 181a-1 and the reception buffer unit 181a-2 is a low-priority frame having the same sequence number as the expected value. Judge whether or not. Then, the low-priority frame expected value matching unit 183a detects that there is no low-priority frame having the same sequence number as the expected value, and displays information indicating no line as an expected value matching result (low-priority frame expected value matching result). The data is output to the line selection control unit 184a.

The line selection control unit 184a that has obtained the expected value matching result from the high priority frame expected value matching unit 182a and the low priority frame expected value matching unit 183a gives priority to the expected value matching result from the high priority frame expected value matching unit 182a. The frame is acquired from the reception buffer unit. That is, when the expected value matching result output from the high priority frame expected value matching unit 182a indicates one of the reception buffer units, the line selection control unit 184a acquires the high priority frame from the reception buffer unit.
In the case of the example of FIG. 5A, the line selection control unit 184a determines the sequence number 152 from the reception buffer unit 181a-1 of the line # 1 according to the expected value matching result output from the high priority frame expected value matching unit 182a. Take out the high priority frame. Thus, the frames stored in the reception buffer units 181a-1 and 181a-2 are as shown in FIG.

  In FIG. 5B, a low-priority frame having a sequence number 76 is stored at the head of the reception buffer unit 181a-1 of the line # 1. In addition, a high priority frame having a sequence number 153 is stored at the head of the reception buffer unit 181a-2 of the line # 2. The line selection control unit 184a has already taken out the high priority frame up to the sequence number 152 and the low priority frame up to the sequence number 75 from the buffer.

  In this case, the high priority frame expected value matching unit 182a stores, in the counter, the expected sequence value 153 that is the next sequence number of the high priority frame that has been extracted by the line selection control unit 184a. Then, the high-priority frame expected value matching unit 182a detects that the top frame of the reception buffer unit 181a-2 is a high-priority frame having the same sequence number as the expected value, and uses the line number # as the expected value matching result. 2 is output to the line selection control unit 184a.

  On the other hand, the low-priority frame expected value matching unit 183a stores 76, which is the next sequence number of the low-priority frame already extracted by the line selection control unit 184a, as an expected value. Then, the low-priority frame expected value matching unit 183a detects that the top frame of the reception buffer unit 181a-1 is a low-priority frame having the same sequence number as the expected value, and uses the line number # as the expected value matching result. 1 is output to the line selection control unit 184a.

The line selection control unit 184a that has obtained the expected value matching result from the high priority frame expected value matching unit 182a and the low priority frame expected value matching unit 183a gives priority to the expected value matching result from the high priority frame expected value matching unit 182a. The frame is acquired from the reception buffer unit.
In the example of FIG. 5B, the line selection control unit 184a determines the sequence number 153 from the reception buffer unit 181a-1 of the line # 2 according to the expected value matching result output from the high priority frame expected value matching unit 182a. Take out the high priority frame. Thus, the frames stored in the reception buffer units 181a-1 and 181a-2 are as shown in FIG.

  In FIG. 5C, a low-priority frame having a sequence number 76 is stored at the head of the reception buffer unit 181a-1 of the line # 1. In addition, a low priority frame of sequence number 77 is stored at the head of the reception buffer unit 181a-2 of the line # 2. The line selection control unit 184a has already taken out the high priority frame up to the sequence number 153 and the low priority frame up to the sequence number 75 from the buffer.

  In this case, the high priority frame expected value matching unit 182a stores, in the counter, the expected sequence value 154 that is the next sequence number of the high priority frame that has been extracted by the line selection control unit 184a. The high-priority frame expected value matching unit 182a detects that there is no high-priority frame having the same sequence number as the expected value, and outputs information indicating no channel to the channel selection control unit 184a as an expected value matching result.

  On the other hand, the low-priority frame expected value matching unit 183a stores 76, which is the next sequence number of the low-priority frame already extracted by the line selection control unit 184a, as an expected value. Then, the low-priority frame expected value matching unit 183a detects that the top frame of the reception buffer unit 181a-1 is a low-priority frame having the same sequence number as the expected value, and uses the line number # as the expected value matching result. 1 is output to the line selection control unit 184a.

The line selection control unit 184a that has obtained the expected value matching result from the high priority frame expected value matching unit 182a and the low priority frame expected value matching unit 183a gives priority to the expected value matching result from the high priority frame expected value matching unit 182a. The frame is acquired from the reception buffer unit. However, in the example of FIG. 5C, the high priority frame expected value matching unit 182a outputs an expected value matching result indicating no line.
Therefore, the line selection control unit 184a extracts the low priority frame of sequence number 76 from the reception buffer unit 181a-1 of the line # 1 according to the expected value collation result output from the low priority frame expected value collation unit 183a. Thus, the frames stored in the reception buffer units 181a-1 and 181a-2 are as shown in FIG.

  As described above, the line selection control unit 184a obtains a frame from the reception buffer unit based on the expected value collation result from the high priority frame expected value collation unit 182a and the low priority frame expected value collation unit 183a. The selection control unit 184a can extract frames in the same arrangement order as the transmission side for each priority. In the example of FIG. 5, the line selection control unit 184 a extracts the high priority frame with the sequence number 153 after extracting the high priority frame with the sequence number 152.

  Also, the line selection control unit 184a gives priority to the expected value collation result from the high priority frame expected value collation unit 182a and obtains the frame from the reception buffer unit, so that the line selection control unit 184a obtains the high priority frame. It can be taken out preferentially. Therefore, the communication device 10a can preferentially process the high priority frame, and can secure the communication speed of the high priority frame.

Next, operations of the sequence information insertion unit 12a and the distribution control unit 13a will be described with reference to FIGS.
FIG. 6 is a flowchart illustrating a processing procedure in which the sequence information insertion unit 12a inserts priority information and a sequence number into a transmission frame, and the distribution control unit 13a stores the frame in a queue. When the sequence information insertion unit 12a detects that the transmission frame is output from the protocol processing unit 11a, the sequence information insertion unit 12a starts the processing of FIG.

  In the process shown in the figure, first, the priority determination unit 121a determines the priority (high or low) of the transmission frame output from the protocol processing unit 11a based on a predetermined determination criterion (for example, VLAN CoS value). judge. Then, the priority determination unit 121a outputs the priority determination result to the high priority frame counter unit 122a, the low priority frame counter unit 123a, and the sequence number insertion unit 124a (step S101).

  Next, the high-priority frame counter unit 122a and the low-priority frame counter unit 123a update each counter value based on the priority determination result output from the priority determination unit 121a, The data is output to the sequence number insertion unit 124a (step S102).

FIG. 7 is a flowchart showing a processing procedure in which the high priority frame counter unit 122a and the low priority frame counter unit 123a update the counter value. The high priority frame counter unit 122a and the low priority frame counter unit 123a execute the process of FIG. 7 in step S102 of FIG.
In the process of FIG. 7, the high priority frame counter unit 122a determines whether or not the priority determination result output from the priority determination unit 121a is “high” (step S201). When it is determined that the priority determination result is “high” (step S201: YES), the high priority frame counter unit 122a increments its own counter by one, that is, adds 1 to the counter value (step S202). . Then, the high priority frame counter unit 122a outputs the counter value as a high priority frame sequence number to the sequence number insertion unit 124a (step S211).
On the other hand, when it is determined that the priority determination result is “low” (step S201: NO), the high priority frame counter unit 122a holds the counter value (that is, does nothing), and proceeds to step S211. move on.

Further, the low priority frame counter unit 123a determines whether or not the priority determination result output from the priority determination unit 121a is “low” (step S221). When it is determined that the priority determination result is “low” (step S221: YES), the low priority frame counter unit 123a increments its own counter by one (step S222). Then, the low priority frame counter unit 123a outputs the counter value as a low priority frame sequence number to the sequence number insertion unit 124a (step S231).
On the other hand, when it is determined that the priority determination result is “high” (step S221: NO), the low priority frame counter unit 123a holds the counter value (that is, does nothing), and proceeds to step S231. move on.
Then, after finishing the processes of steps S211 and S231, the process of FIG.

Returning to FIG. 6, the sequence number insertion unit 124 a determines the high priority frame sequence number output from the high priority frame counter unit 122 a and the low priority based on the priority determination result output from the priority determination unit 121 a. Either the low priority frame sequence number output from the frame counter unit 123a is inserted into the head of the transmission frame output from the protocol processing unit 11a in a set with the priority determination result (step S103). Specifically, the sequence number insertion unit 124a inserts a high priority frame sequence number if the priority determination result is “high”, and a low priority frame sequence number if the priority determination result is “low”. Insert.
Then, the sequence number insertion unit 124a outputs the transmission frame in which the priority determination result and the sequence number are inserted as a transmission frame with sequence information to the distribution control unit 13a (step S104).

  When the transmission frame with sequence information is output from the sequence number insertion unit 124a, the high-priority queue unit 131a or the low-priority queue unit 132a determines that the transmission frame with sequence information has its own FIFO method according to its priority. (Step S105).

  Specifically, the high priority queue unit 131a determines whether the priority of the transmission frame with sequence information output from the sequence number insertion unit 124a is high, and if it is determined that the priority is high, The transmission frame with sequence information is stored in the high priority queue. On the other hand, when it is determined that the priority is low, the high priority queue unit 131a does not store the transmission frame with sequence information (does nothing). In this way, the high priority queue unit 131a stores the high priority transmission frame in the high priority queue among the transmission frames with sequence information output from the sequence number insertion unit 124a.

Further, the low priority queue unit 132a determines whether or not the priority of the transmission frame with sequence information output from the sequence number insertion unit 124a is low, and if it is determined that the priority is low, the low priority queue unit 132a includes the sequence information. Store the transmission frame in the low priority queue. On the other hand, when it is determined that the priority is high, the low priority queue unit 132a does not store the transmission frame with sequence information (does nothing). In this manner, the low priority queue unit 132a stores the low priority transmission frame in the low priority queue among the transmission frames with sequence information output from the sequence number insertion unit 124a.
Thereafter, the process of FIG.

Next, the operation of the distribution control unit 13a will be described with reference to FIG.
FIG. 8 is a flowchart illustrating a processing procedure in which the distribution control unit 13a distributes a transmission frame with sequence information to a wireless line. The distribution control unit 13a repeatedly performs the process shown in FIG.
In the process shown in FIG. 6, first, the line selection control unit 134a determines whether or not a transmission frame with sequence information is stored in the high priority queue (step S301). If it is determined that it is stored (step S301: YES), the line selection control unit 134a reads the transmission frame with sequence information from the high priority queue (step S311).

Further, the allocation ratio determining unit 133a is based on the modulation scheme designation information output from the extraction unit 17a-1 of the line # 1 and the modulation scheme designation information output from the extraction unit 17a-2 of the line # 2. The number ratio of frames to be distributed to each line is determined so that the capacity usage rate of the line is equal, and the determined number ratio is output to the line selection control unit 134a as the distribution number ratio (step S341).
Next, the line selection control unit 134a determines (selects) one of the radio lines # 1 and # 2 based on the distribution ratio output from the distribution ratio determination unit 133a (step S342).

However, the timing at which the distribution ratio determining unit 133a determines the distribution number ratio is not limited to each time the line selection control unit 134a reads out the transmission frame with sequence information from the queue. For example, each time the modulation scheme of the modulation / transmission unit 15a-1 or the modulation / transmission unit 15a-2 is changed, the allocation ratio determination unit 133a may determine the allocation number ratio. In this case, for example, the line selection control unit 134a stores the distribution number ratio output from the distribution ratio determination unit 133a, and updates it every time the distribution number ratio is output from the distribution ratio determination unit 133a. Then, the line selection control unit 134a determines one of the radio lines # 1 and # 2 based on the distribution number ratio stored in itself.
As described above, each time the modulation scheme of the modulation / transmission unit 15a-1 or the modulation / transmission unit 15a-2 is changed, the allocation ratio determination unit 133a determines the allocation number ratio, so that the allocation ratio determination unit 133a The number of times of determining the distribution number ratio can be reduced, and the load on the distribution ratio determination unit 133a can be reduced.

After step S342, the line selection control unit 134a outputs the transmission frame with sequence information read from the queue in step S311 or step S332, which will be described later, to the multiplexing unit 14a of the radio line determined in step S332 as multiplexing target data ( Step S343).
Thereafter, the process of FIG.

On the other hand, when it is determined in step S301 that the transmission frame with sequence information is not stored in the high priority queue (step S301: NO), the line selection control unit 134a stores the transmission frame with sequence information in the low priority queue. It is determined whether or not (step S321). If it is determined that it is stored (step S321: YES), the line selection control unit 134a reads the transmission frame with sequence information from the low priority queue (step S332).
Thereafter, the process proceeds to step S341.
On the other hand, if it is determined in step S321 that the transmission frame with sequence information is not stored in the low priority queue (step S321: NO), the processing in FIG.

Next, the operation of the aggregation control unit 18a will be described with reference to FIGS.
FIG. 9 is a flowchart showing a processing procedure in which the aggregation control unit 18a aggregates received frames. The aggregation control unit 18a repeatedly performs the process shown in FIG.
In the process shown in FIG. 5, first, the reception buffer unit 181a-1 of the line # 1 has priority from the extracted data (received frame with sequence information output from the extraction unit 17a) stored at the head of its own buffer. The information and sequence number are read and output to the high priority frame expected value matching unit 182a and the low priority frame expected value matching unit 183a.
In addition, the reception buffer unit 181a-2 of the line # 2 reads the priority information and the sequence number from the extracted data stored at the head of its own buffer, and the high priority frame expected value matching unit 182a The data is output to the priority frame expected value matching unit 183a.

  Next, the high-priority frame expected value matching unit 182a and the low-priority frame expected value matching unit 183a set priority information and sequence numbers output from the reception buffer unit 181a-1 and the reception buffer unit 181a-2, respectively. Based on this, it is determined whether or not it matches the expected value stored by itself, and the determination result is output to the line selection control unit 184a (step S602).

Here, FIG. 10 shows that the priority information and sequence number output from the reception buffer unit 181a-1 and the reception buffer unit 181a-2 by the high priority frame expected value matching unit 182a indicate the high priority expected value counter. It is a flowchart which shows the process sequence which determines whether it corresponds with an expected value. The high priority frame expected value matching unit 182a starts the process of FIG. 9 in step S602 of FIG.
In the process of FIG. 10, the high priority frame expected value matching unit 182a initializes the value of the counter i indicating the wireless line number to 1 (step S701).

  Next, the high priority frame expected value matching unit 182a determines whether or not the priority information output from the reception buffer unit of the radio line #i indicates high priority (step S702). When it is determined that high priority is indicated (step S702: YES), the high priority frame expected value matching unit 182a outputs the sequence number output from the reception buffer unit of the radio line #i and the expected value indicated by the high priority expected value counter. Is matched (step S711). When it is determined that they match (YES in step S711), the high priority frame expected value matching unit 182a generates a matching result indicating the wireless line #i, and outputs the result to the line selection control unit 184a as the high priority frame expected value matching result. (Step S721).

Thereafter, the high-priority frame expected value matching unit 182a determines whether or not the extracted data (received frame with sequence information) stored at the head of the wireless line #i has been read (step S722). The extracted data is read by the line selection control unit 184a in step S604 in FIG.
If it is determined that the extracted data has not been read (step S722: NO), the process returns to step S722 and waits for the extracted data to be read.
On the other hand, when it is determined that the extracted data has been read (step S722: YES), the high priority frame expected value matching unit 182a increments the value (expected value) of the high priority expected value counter by +1 (step S723). Thereafter, the process of FIG.

  On the other hand, if it is determined in step S702 that the priority information does not indicate high priority (step S702: NO), and if it is determined in step S711 that the sequence number does not match the expected value (step S711: NO). ) The high-priority frame expected value matching unit 182a increments the value of the counter i indicating the wireless line number by +1 (step S732).

Next, the high priority frame expected value matching unit 182a determines whether or not the value of the counter i is larger than the number of lines (2 in the present embodiment) (step S732). When it is determined that the value of the counter i is equal to or less than the number of lines (step S732: NO), the process returns to step S702.
On the other hand, when it is determined that the value of the counter i is larger than the number of lines (step S732: YES), the high priority frame expected value matching unit 182a generates a matching result indicating that there is no corresponding wireless line, and the high priority frame The expected value comparison result is output to the line selection control unit 184a (step S741).
Thereafter, the process of FIG.

As described above, the high priority frame expected value matching unit 182a can determine the number of the wireless line that stores the extracted data whose sequence number matches the expected value stored in the high priority frame expected value matching unit 182a, or the corresponding wireless line. Information indicating that there is no data is output to the line selection control unit 184a as a high priority frame expected value comparison result.
Similarly, the low-priority frame expected value matching unit 183a determines the number of the wireless line that stores the extracted data whose sequence number matches the expected value stored in the low-priority frame expected value matching part 183a itself, or the corresponding wireless line Information indicating the absence is output to the line selection control unit 184a as the low priority frame expected value comparison result.

  Returning to FIG. 9, the line selection control unit 184a that acquires the high priority frame expected value matching result from the high priority frame expected value matching unit 182a and acquires the low priority expected value frame matching result from the low priority frame expected value matching unit 183a. Selects either the reception buffer unit 181a-1 of line # 1 or the reception buffer unit 181a-2 of line # 2 based on these collation results, and acquires the extracted data from the selected reception buffer. The received frame with sequence information is output to the sequence information deleting unit 19a (step S604). At that time, as described with reference to FIG. 5, the line selection control unit 184a selects the reception buffer unit with priority given to the expected value collation result from the high priority frame expected value collation unit 182a.

Here, FIG. 11 is a flowchart showing a processing procedure in which the line selection control unit 184a acquires and outputs the extracted data. The line selection control unit 184a starts the process of FIG. 9 in step S603 of FIG.
In the process of FIG. 11, the line selection control unit 184a determines whether or not the high priority frame expected value comparison result indicates the number of the wireless line (step S801). When it is determined that the wireless line number is indicated (step S801: YES), the line selection control unit 184a reads the extracted data from the reception buffer of the wireless line indicated by the high priority frame expected value collation result (step S811).
Then, the line selection control unit 184a outputs the extracted data read in step S811 or step S831 described later to the sequence information deletion unit 19a as a reception frame with sequence information (step S841).
Thereafter, the process of FIG.

On the other hand, when it is determined in step S801 that the high priority frame expected value matching result indicates that there is no corresponding wireless line (step S801: NO), the line selection control unit 184a determines that the low priority frame expected value matching result is wireless. It is determined whether or not the line number is indicated (step S821). When it is determined that the wireless line number is indicated (step S821: YES), the line selection control unit 184a reads the extracted data from the reception buffer of the wireless line indicated by the low priority frame expected value collation result (step S831).
Thereafter, the process proceeds to step S841.
On the other hand, when it is determined in step S821 that the low-priority frame expected value comparison result indicates that there is no corresponding wireless line (step S821: NO), the processing in FIG.

As described above, the sequence information insertion unit 12a assigns priority information indicating the priority set for the frame and sequence information which is information indicating the arrangement order of the frames for each frame priority. Then, the distribution control unit 13a preferentially selects a frame to which priority information and sequence information are assigned according to the priority of the frame to which the priority information and sequence information are assigned. To one of the lines. Then, the modulation / transmission unit 15a transmits the frame to which the priority information and the sequence information are assigned using the line distributed by the distribution control unit 13a.
As a result, even if a frame is transmitted using a plurality of lines, frame distribution control according to the priority of the frame is possible. Sequence control can be performed, delay time associated with the sequence control and fluctuations in delay time can be reduced, and the reception side uses the sequence information given to the frame to You can arrange the frames in order.
That is, using a plurality of lines, high priority data can be communicated at higher speed, and the received data can be arranged in the same order as the transmitting side.

Further, the modulation / transmission unit 15a wirelessly transmits a frame to which priority information and sequence information are added, and the distribution control unit 13a transmits a frame to which the modulation information / transmission unit 15a is assigned priority information and sequence information. Depending on the state of the wireless line to be controlled, the distribution of the frame to which the sequence information is assigned to each wireless line is controlled. As a result, frame distribution control according to the transmission capacity of the wireless line can be performed, so that the line can be used efficiently even when the transmission capacity differs for each line.
That is, using a plurality of lines and distributing frames according to the transmission capacity of each line, high-priority data can be communicated at a higher speed, and the received data is transmitted to the transmitting side. They can be arranged in a similar order.

  In the above, the case where the communication system performs communication using two wireless lines # 1 and # 2 has been described. However, the scope of application of the present invention is not limited to the case where two wireless lines are used. . The present invention can also be applied when the communication system performs communication using n (n is an integer of n ≧ 2) wireless lines.

  Further, the case where the communication system performs communication using two types of priority (high or low) has been described above, but the scope of application of the present invention is not limited to the case where two types of priority are used. . The present invention can also be applied when the communication system performs communication using n (n is an integer of n ≧ 2) types of priorities.

  Moreover, although the case where the communication system performs wireless communication has been described above, the application range of the present invention is not limited to wireless communication. For example, when the communication system performs communication using a plurality of wired communication circuits and the communication capacity allocated to the communication system changes according to the time zone, the communication system performs communication using the plurality of communication circuits, The present invention can be applied to various communication systems that can know the communication capacity of a communication circuit.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Communication system 10a, 10b Communication apparatus 11a, 11b Protocol processing part 12a, 12b Sequence information insertion part 121a Priority determination part 122a High priority frame counter part 123a Low priority frame counter part 124a Sequence number insertion part 13a, 13b Distribution control part 131a High priority queue unit 132a Low priority queue unit 133a Distribution ratio determining unit 134a Line selection control unit 14a-1, 14a-2, 14b-1, 14b-2 Multiplexing units 15a-1, 15a-2, 15b-1, 15b- 2 Modulation / Transmission Unit 16a-1, 16a-2, 16b-1, 16b-2 Reception / Demodulation Unit 17a-1, 17a-2, 17b-1, 17b-2 Extraction Unit 18a, 18b Aggregation Control Unit 181a-1 , 181a-2 Reception buffer unit 182a Expected value of high priority frame Engaging portion 183a low-priority frame expected value comparison unit 184a line selection control unit 19a, 19b sequence information deletion unit

Claims (6)

Sequence information addition that gives priority information indicating the priority set for the frame and sequence information that indicates the arrangement order of the frames for each frame priority to each frame to be communicated And
Depending on the priority of the frame to which the priority information and the sequence information are assigned, the frame having the priority information and the sequence information is preferentially assigned to one of a plurality of lines according to the priority of the frame to which the priority information and the sequence information are assigned. A distribution control unit for distribution;
A transmission unit that transmits the frame provided with the priority information and the sequence information using a line distributed by the distribution control unit;
A communication apparatus comprising: The transmission unit wirelessly transmits a frame to which the priority information and sequence information are attached,
The distribution control unit distributes the frame to which the sequence information is assigned to each radio channel according to the state of the radio channel to which the transmission unit transmits the frame to which the priority information and sequence information are added. The communication device according to claim 1, wherein the communication device is controlled. A receiving unit that receives priority information indicating the priority of the frame, sequence information that is information indicating the arrangement order of the frames for each priority of the frame, and that is distributed and transmitted to a plurality of lines;
An aggregation control unit that arranges the frames given the priority information and sequence information received by the reception unit for each priority according to the arrangement order indicated by the sequence information;
A communication apparatus comprising: A communication system comprising a first communication device and a second communication device,
The first communication device is
Sequence information addition that gives priority information indicating the priority set for the frame and sequence information that indicates the arrangement order of the frames for each frame priority to each frame to be communicated And
Depending on the priority of the frame to which the priority information and the sequence information are assigned, the frame having the priority information and the sequence information is preferentially assigned to one of a plurality of lines according to the priority of the frame to which the priority information and the sequence information are assigned. A distribution control unit for distribution;
A transmission unit that transmits the frame provided with the priority information and the sequence information using a line distributed by the distribution control unit;
Comprising
The second communication device is
A receiving unit that receives the frame to which the priority information and the sequence information are assigned, which is transmitted from the first communication device while being distributed to the plurality of lines;
An aggregation control unit that arranges the frames given the priority information and sequence information received by the reception unit for each priority according to the arrangement order indicated by the sequence information;
A communication system comprising: A communication device transmission method comprising:
Sequence information addition that gives priority information indicating the priority set for the frame and sequence information that indicates the arrangement order of the frames for each frame priority to each frame to be communicated Steps,
Depending on the priority of the frame to which the priority information and the sequence information are assigned, the frame having the priority information and the sequence information is preferentially assigned to one of a plurality of lines according to the priority of the frame to which the priority information and the sequence information are assigned. A distribution control step of distributing;
A step of transmitting the frame to which the priority information and the sequence information are attached using a line distributed by the distribution control unit;
The transmission method characterized by comprising. A received frame alignment method for a communication device that receives a frame as a communication target,
A receiving step for receiving a frame which is given priority information indicating the priority of the frame, and sequence information which is information indicating the arrangement order of the frames for each frame priority, and is distributed to a plurality of lines;
An aggregation control step for arranging the frames given the priority information and sequence information received by the reception unit for each priority according to the arrangement order indicated by the sequence information;
A received frame alignment method.

Images