JP2013197719A - Device, system and method for radio communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently increase the use efficiency of a radio band of a radio communication device, even at simultaneous transmission of data in which high communication quality is required and data in which low communication quality is permitted.SOLUTION: A class determination unit 1200 determines the priority of transmission data. A frame identifier addition unit 1300 generates transmission data in which a priority identifier etc. corresponding to the priority is added to data to be transmitted. According to the priority identifier, a communication means selection unit 1400 inputs the transmission data at least to a portion of communication means 1100. For each transmission data, the communication means 1100 confirms whether the data amount thereof is a predetermined data amount or lower, and preferentially from transmission data having the highest priority, multiplexes data into a radio frame. For each reception data, a reception frame recognition unit 2200 extracts transmission data from each communication means 2100, to output the transmission data in order of a sequence number.

Description

  The present invention relates to a wireless communication device, a wireless communication system, and a wireless communication method, and more particularly to a wireless communication device, a wireless communication system, and a wireless communication method that transmit and receive data having different communication qualities.

  Generally, two transmitters / receivers are provided, and each transmitter / receiver (hereinafter referred to as a communication means) is a wireless communication device (hereinafter referred to as a wireless communication device having a 2 + 0 configuration) that performs wireless communication with an opposite device in different frequency bands. )It has been known. The wireless communication apparatus having the 2 + 0 configuration selects a frequency band having a good communication environment from two different frequency bands, and performs communication in the frequency band. Therefore, a wireless communication device having a 2 + 0 configuration can secure a larger transmission capacity than a wireless communication device that uses only one frequency band.

  However, the wireless communication device having the 2 + 0 configuration has a problem that it has a low ability to maintain data communication quality, in particular, data quality that needs to be reliably transmitted to a transmission destination in real time, such as voice data. The reason is that a wireless communication device having a 2 + 0 configuration does not perform wireless communication using a plurality of frequency bands to transmit data to the opposite wireless communication device, but performs wireless communication in one selected frequency band. Because it does. If the communication environment of the selected frequency band is deteriorated, the wireless communication device having the 2 + 0 configuration easily causes data loss. Especially in the case of data that needs to be reliably transmitted to the destination in real time, such as voice data (hereinafter referred to as data that requires high communication quality), even if a slight data loss occurs, the effect will be Become prominent.

  For example, Patent Literature 1 discloses a wireless communication device that can solve the above-described problems.

  The wireless communication device of Patent Literature 1 includes data acquisition means, communication quality determination means, communication means, and position information acquisition means. The data acquisition unit acquires data. Further, the communication quality determining means determines the communication quality required from the acquired data. Further, the communication means wirelessly communicates data so that the determined communication quality can be realized.

  For example, the wireless communication device of Patent Literature 1 operates as follows.

  First, data including quality data is acquired. Next, the communication quality determining means determines the required communication quality from the acquired quality data. Then, the communication means obtains the communication means 7 corresponding to the communication quality, the communication method, the conversion, division, etc. of the communication packet so as to realize the determined communication quality, and wirelessly communicates the data. The wireless communication apparatus of Patent Literature 1 may include a plurality of communication units, and at least some of the plurality of communication units may be selected according to the determined communication quality.

  With the configuration and operation described above, the wireless communication device disclosed in Patent Document 1 uses a plurality of communication means (frequency bands) according to the communication quality of the data. Therefore, even for data that requires high communication quality, the communication quality is high. It is possible to increase the ability to maintain the power of the wireless communication apparatus having the 2 + 0 configuration.

JP 2011-009975 A

  However, the wireless communication device of Patent Document 1 transmits data that requires high communication quality and data that allows low communication quality within the same wireless frame (hereinafter referred to as “simultaneously”). There was a problem that the utilization efficiency of the radio band was not sufficiently increased.

  The reason why the above problem occurs will be described below.

  First, Patent Document 1 describes a wireless communication apparatus that selects and transmits communication means 7 or the like according to the communication quality for each input data. However, in Patent Document 1, data that requires high communication quality (hereinafter referred to as high quality data) and data that allows low communication quality (hereinafter referred to as low quality data) are transmitted by the same communication means 7. There is no special description or suggestion to do. Therefore, when the high quality data and the low quality data are input at the same time, the wireless communication device of Patent Document 1 is interpreted as transmitting the high quality data and the low quality data using different communication means 7. The

  In order to achieve the effect of “satisfying the required quality of communication and performing wireless communication with high reliability”, the wireless communication device of Patent Document 1 is configured so that each communication unit 7 has different frequency bands so that wireless interference does not occur. Is interpreted as sending data.

  As a result, the wireless communication device of Patent Document 1 has a small amount of high-quality data, and even when wireless communication is performed only for a short time, a frequency band for high-quality data communication and a low-quality data communication Each frequency band is secured. Since the frequency band is secured for each data having different communication quality, the wireless communication device of Patent Document 1 has not sufficiently improved the utilization efficiency of the wireless band.

  An object of the present invention is to provide a wireless communication device, a wireless communication system, and a wireless communication method that solve the above-described problems.

In order to achieve the above object, the wireless communication apparatus of the present invention includes a plurality of communication means for performing wireless communication with an opposite apparatus in a predetermined frequency band, and class determination for determining the priority of input transmission data. A frame identifier adding unit that generates transmission data to which at least a priority identifier corresponding to the priority determined by the class determination unit and a sequence number is assigned to the input transmission data, and the transmission data. A communication means selection unit for inputting to at least a part of the communication means according to the priority corresponding to the priority identifier;
With
When a plurality of the transmission data is input from the communication means selection unit, the communication unit checks whether the data amount is equal to or less than a predetermined data amount for each transmission data, and determines a predetermined data amount. If it is below, the transmission data having a high priority corresponding to the priority identifier is preferentially multiplexed into a radio frame having a predetermined format and transmitted to a radio transmission path.

In order to achieve the above object, the wireless communication device of the present invention includes a plurality of communication means for performing wireless communication with a device facing each other in a predetermined frequency band, and for each received data received by each communication means in advance. A priority identifier, a sequence number, and the transmission data corresponding to the priority of transmission data to be output are extracted in accordance with a predetermined radio frame format, and at least the transmission data and the sequence number are temporarily stored for each priority identifier. A received frame recognition unit for storing,
The received frame recognition unit outputs the transmission data temporarily stored for each priority identifier in the order of the sequence numbers.

To achieve the above object, a wireless communication system of the present invention is a wireless communication system in which a wireless communication device and a wireless communication device facing the wireless communication device perform wireless communication in a plurality of frequency bands,
The wireless communication device includes a plurality of communication means for performing wireless communication with an opposite device in a predetermined frequency band, a class determination unit that determines the priority of input transmission data, and the input transmission data. On the other hand, a frame identifier assigning unit that generates transmission data to which at least a priority identifier corresponding to the priority determined by the class determination unit and a sequence number is assigned, and the transmission data to a priority corresponding to the priority identifier. In response, a communication means selection unit for inputting to at least a part of the communication means;
With
When a plurality of the transmission data is input from the communication means selection unit, the communication unit checks whether the data amount is equal to or less than a predetermined data amount for each transmission data, and determines a predetermined data amount. If it is below, the transmission data having a high priority corresponding to the priority identifier is preferentially multiplexed in a wireless frame having a predetermined format and transmitted to a wireless transmission path,
The wireless communication device facing the wireless communication device is predetermined for each of a plurality of communication means for performing wireless communication with the facing device in a predetermined frequency band, and for each reception data received by each communication means. A priority identifier corresponding to the priority of transmission data to be output, a sequence number, and the transmission data are extracted according to the format of the radio frame, and at least the transmission data and the sequence number are temporarily stored for each priority identifier. A frame recognition unit,
The received frame recognition unit outputs the transmission data temporarily stored for each priority identifier in the order of the sequence numbers.

In order to achieve the above object, a wireless communication method of the present invention is a wireless communication method in which a wireless communication device and a wireless communication device facing the wireless communication device perform wireless communication,
The wireless communication device is a wireless communication device comprising a plurality of communication means for performing wireless communication with a device facing each other in a predetermined frequency band,
Determine the priority of the input transmission data,
For the input transmission data, generate a priority identifier corresponding to the priority determined by the class determination unit, a size identifier corresponding to the data size of the transmission data, and transmission data to which a sequence number is assigned,
The transmission data is input to at least a part of the communication means according to the priority corresponding to the priority identifier,
When a plurality of the transmission data is input from the communication means selection unit, the communication unit checks whether the data amount is equal to or less than a predetermined data amount for each transmission data, and determines a predetermined data amount. If it is below, the transmission data having a high priority corresponding to the priority identifier is preferentially multiplexed in a wireless frame having a predetermined format and transmitted to a wireless transmission path,
The wireless communication device facing the wireless communication device is the wireless communication device including a plurality of communication means for performing wireless communication with the facing device in a predetermined frequency band,
For each received data received by each communication means, a priority identifier corresponding to the priority of transmission data to be output according to a predetermined radio frame format, a size identifier corresponding to the data size of the transmission data, and a sequence number And extracting the transmission data, and temporarily storing at least the transmission data and a sequence number for each priority identifier,
The transmission data temporarily stored for each priority identifier is output in the order of the sequence numbers.

  According to the present invention, the wireless communication apparatus can sufficiently improve the utilization efficiency of the wireless band even when data requiring high communication quality and data allowing low communication quality are transmitted simultaneously.

It is a figure which shows the structural example of the radio | wireless communications system to which the radio | wireless communication apparatus in the 1st Embodiment of this invention is applied. It is a figure which shows the structural example of the received frame recognition part 153 of the radio | wireless communication apparatus in the 1st Embodiment of this invention. It is a figure which shows operation | movement of the transmission part 101 of the radio | wireless communication apparatus in the 1st Embodiment of this invention. It is a figure which shows operation | movement of the receiving part 150 of the radio | wireless communication apparatus in the 1st Embodiment of this invention. It is a figure which shows the structural example of the radio | wireless communications system to which the radio | wireless communication apparatus in the 2nd Embodiment of this invention is applied. It is a figure which shows the structural example of the radio | wireless communication apparatus in the 3rd Embodiment of this invention. It is a figure which shows the structural example of the radio | wireless communications system to which the radio | wireless communication apparatus in the 4th Embodiment of this invention is applied.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
[Description of configuration]
FIG. 1 is a diagram illustrating a configuration example of a wireless communication system to which the wireless communication apparatus according to the first embodiment of the present invention is applied. FIG. 2 is a diagram illustrating a configuration example of the reception frame recognition unit 153 of the wireless communication device according to the first embodiment of the present invention.

(1) Configuration of a wireless communication system to which the wireless communication apparatus in the first embodiment is applied As shown in FIG. 1, two wireless communication systems to which the wireless communication apparatus in the first embodiment is applied are the same. It consists of a wireless communication device. In FIG. 1, a wireless device A100 and a wireless device B200 are illustrated as two identical wireless communication devices.

  In addition, each wireless communication device is connected via wireless transmission paths in different frequency bands.

(2) Configuration of Radio Communication Device in First Embodiment Each radio communication device includes a transmission unit 101 and a reception unit 150.

(3) Configuration of Transmission Unit 101 First, the configuration of the transmission unit 101 will be described.

  As shown in FIG. 1, the transmission unit 101 includes a class determination unit 102, a frame identifier generation unit 103, a frame identifier assignment unit 104, a communication means selection unit 109, a wireless transmission unit 107, and a wireless transmission unit 108. It consists of. Further, the communication means selection unit 109 includes a high priority queue 105 and a low priority queue 106 which are first-in first-out (FIFO) type buffers.

  The class determination unit 102 and the frame identifier assigning unit 104 are connected to a network network such as a LAN through a wired line. The class determination unit 102 is connected to the frame identifier generation unit 103, and the frame identifier generation unit 103 is connected to the frame identifier provision unit 104.

  Further, the frame identifier assigning unit 104 is connected to the communication means selecting unit 109. Specifically, the frame identifier assigning unit 104 is connected to the high priority queue 105 and the low priority queue 106 of the communication means selection unit 109.

  The communication means selection unit 109 is connected to the wireless transmission unit 107 and the wireless transmission unit 108. Specifically, the high priority queue 105 of the communication means selection unit 109 is connected to the wireless transmission unit 107 and the wireless transmission unit 108, and the low priority queue 106 is connected to the wireless transmission unit 108. Although not illustrated in FIG. 1, the low priority queue 106 may be connected to the wireless transmission unit 107 and the wireless transmission unit 108.

  Note that the class determination unit 102, the frame identifier generation unit 103, the frame identifier assignment unit 104, and the communication means selection unit 109 are, for example, a DSP (Digital Signal Processor) or a CPU (Central Processing Unit) installed in the wireless communication device. This is realized using an arithmetic processing unit. Furthermore, the class determination unit 102, the frame identifier generation unit 103, the frame identifier assignment unit 104, and the communication means selection unit 109 may be realized using an FPGA (Field-Programmable Gate Array) or an electronic circuit. The wireless transmission unit 107 and the wireless transmission unit 108 are realized using electronic circuits.

(4) Configuration of Receiving Unit 150 Next, the configuration of the receiving unit 150 will be described.

  The reception unit 150 includes a wireless reception unit 151, a wireless reception unit 152, a reception frame recognition unit 153, a reception frame identifier storage table 154, and a frame identifier deletion unit 155. The received frame recognition unit 153 includes an identifier duplication determination unit 51, a sequence control unit 52, and a buffer 53 as shown in FIG.

  The wireless reception unit 151 and the wireless reception unit 152 are connected to the identifier duplication determination unit 51 of the reception frame recognition unit 153. The identifier duplication determination unit 51 of the reception frame recognition unit 153 is connected to the reception frame identifier storage table 154 and the sequence control unit 52. Further, the sequence control unit 52 of the received frame recognition unit 153 is connected to the frame identifier deletion unit 155 and the buffer 53. The frame identifier deletion unit 155 is connected to a network such as a LAN via a wired line.

  Note that the wireless reception unit 151, the wireless reception unit 152, the frame identifier deletion unit 155, the identifier duplication determination unit 51 of the reception frame recognition unit 153, and the sequence control unit 52 are, for example, a DSP or a CPU mounted on a wireless communication device. This is realized using the arithmetic processing unit. The wireless reception unit 151, the wireless reception unit 152, the frame identifier deletion unit 155, the identifier duplication determination unit 51 of the reception frame recognition unit 153, and the sequence control unit 52 may be realized using an FPGA or an electronic circuit. The reception frame identifier storage table 154 is realized using a storage device such as a RAM.

  Next, functions of the wireless communication apparatus according to the first embodiment will be described.

(5) Function of each part constituting transmission unit 101 First, the function of each part constituting transmission unit 101 will be described.

(5-1) Function of Class Determination Unit 102 The class determination unit 102 determines the priority level of input transmission data. Specifically, the class determination unit 102 determines whether the priority of the transmission data depends on whether the number represented by the bit string indicating the priority included in the transmission data (hereinafter referred to as priority information bits) is higher than a predetermined threshold. Judge the height. The predetermined threshold is a value set in the class determination unit 102 by the user of the present embodiment. For example, when the user of the present embodiment sets the predetermined threshold value to 3, the class determination unit 102 determines transmission data including priority information bits having a value larger than the threshold value 3 as high priority data.

  The class determination unit 102 outputs the result of determining the priority level of transmission data and the transmission data as priority class determination data.

(5-2) Function of Frame Identifier Generation Unit 103 The frame identifier generation unit 103 receives a size identifier corresponding to the data size of input transmission data and a priority identifier corresponding to the priority of transmission data, respectively. Generate as a bit string. In addition, the frame identifier generation unit 103 generates a sequence number. Specifically, every time priority class determination data is input, the frame identifier generation unit 103 uses a bit string corresponding to a value incremented by one from the initial value as a sequence number. The initial value is a value set in the frame identifier generation unit 103 by the user of the present embodiment, and may be 0. Furthermore, the frame identifier generation unit 103 outputs a frame identifier in which a priority identifier, a size identifier, and a sequence number are combined in order as frame identifier data.

(5-3) Function of Frame Identifier Giving Unit 104 The frame identifier giving unit 104 assigns frame identifier data to the input transmission data and outputs the frame identifier data.

(5-4) Function of Communication Means Selection Unit 109 The communication means selection unit 109 confirms the priority identifier of the input frame identifier assignment data, and if the priority is low, the frame identifier assignment data is sent to the low priority queue. If the priority is high, the frame identifier giving data is stored in the high priority queue. Further, the communication means selection unit 109 outputs frame identifier assignment data for each of the high priority queue and the low priority queue.

(5-5) Functions of the wireless transmission unit 107 and the wireless transmission unit 108 The wireless transmission unit 107 and the wireless transmission unit 108 have a high priority when the input frame identifier assignment data is less than or equal to a predetermined data amount. The data is preferentially multiplexed into a radio frame having a predetermined format. Here, the above-mentioned predetermined data amount is a value set by the user of the present embodiment in the wireless transmission unit 107 and the wireless transmission unit 108 for each frame identifier assignment data. Also, the wireless transmission unit 107 and the wireless transmission unit 108 perform a known modulation / coding process on the multiplexed wireless frame and output as a wireless signal.

(6) Functions of Each Part that Configures Receiving Unit 150 Next, functions of each part that configures receiving unit 150 will be described.

(6-1) Functions of Radio Reception Unit 151 and Radio Reception Unit 152 The radio reception unit 151 and the radio reception unit 152 perform known demodulation / decoding processing on the input radio signal and output it as frame data.

(6-2) Function of Received Frame Recognition Unit 153 (Identifier Duplication Determination Unit 51) The identifier duplication determination unit 51 of the reception frame recognition unit 153 receives a priority identifier, a size identifier, a sequence number, and further transmits from input frame data. Extract and output data. Hereinafter, the priority identifier, the size identifier, and the sequence number are referred to as identifier information. The identifier duplication determination unit 51 discards the transmission data when the output destination has the same identifier information.

(6-3) Function of Reception Frame Identifier Storage Table 154 Here, the reception frame identifier storage table 154 stores input identifier information for a predetermined time. The predetermined time is a value set in the received frame identifier storage table 154 by the user of the present embodiment.

(6-4) Function of Received Frame Recognition Unit 153 (Sequence Control Unit 52) The sequence control unit 52 temporarily stores input transmission data and identifier information for each priority identifier. The sequence control unit 52 recognizes the priority identifier and the sequence number from the input identifier information. The sequence control unit 52 rearranges the temporarily stored transmission data and the identifier information in the order of the sequence numbers and outputs them as frame data.

(6-5) Function of Frame Identifier Deletion Unit 155 The frame identifier deletion unit 155 deletes the identifier information from the input frame data and outputs it as transmission data.

[Description of operation of wireless communication device]
FIG. 3 is a diagram illustrating an operation of the transmission unit 101 of the wireless communication apparatus according to the first embodiment of the present invention. FIG. 4 is a diagram illustrating an operation of the reception unit 150 of the wireless communication device according to the first embodiment of the present invention.

  The transmission unit 101 and the reception unit 150 operate independently of each other.

(7) Transmission Operation of Transmission Unit 101 The transmission operation of the transmission unit 101 will be described below.

  First, the class determination unit 102 receives transmission data D101 from the network as shown in FIG. 3 (S101).

  Here, the transmission data D101 is a bit string indicating the priority of transmission data, such as data standardized in IEEE802.1p, that is, data including priority information bits. When the transmission data D101 is data standardized by IEEE802.1p, 3 bits in the “user class” field in the VLAN tag of the MAC frame are priority information bits. The 3 bits of the “user class” field can be expressed by a value from 0 to 7, with 7 being the highest priority.

  Next, the class determination unit 102 determines the priority level of the received transmission data D101. (S102). Next, the class determination unit 102 transmits the result of determining the priority level of the transmission data D101 and the transmission data D101 to the frame identifier generation unit 103 as the priority class determination data D102.

  The frame identifier generation unit 103 receives the priority class determination data D102 and uses the data size of the transmission data included in the priority class determination data D102 as a size identifier. Further, the frame identifier generation unit 103 sets the priority of the transmission data D101 included in the priority class determination data D102 as a priority identifier. Further, the frame identifier generation unit 103 generates a sequence number. Then, the frame identifier generation unit 103 transmits a frame identifier obtained by sequentially combining the size identifier, the priority identifier, and the sequence number to the frame identifier giving unit 104 as frame identifier data D103 (S103).

  Next, the frame identifier assigning unit 104 receives the frame identifier data D103 from the frame identifier generating unit 103, and further receives the transmission data D101 from the network. Then, the frame identifier assigning unit 104 assigns the frame identifier data D103 to the transmission data D101, and transmits the frame identifier added data D104 to the communication means selecting unit 109 (S104).

  The communication means selection unit 109 checks the priority identifier included in the frame identifier data D103 of the received frame identifier provision data D104. If the priority is high, the communication means selection unit 109 stores the frame identifier provision data D104 in the high priority queue 105. To store. If the priority is low, the communication means selection unit 109 stores the frame identifier assignment data D104 in the low priority queue 106 (S105). Next, the communication means selection unit 109 sets the frame identifier assignment data D104 extracted from the high priority queue 105 as data D105 and data D106, transmits the data D105 to the wireless transmission unit 107, and transmits the data D106 to the wireless transmission unit 108. Send. Further, the communication means selection unit 109 transmits the frame identifier provision data D104 extracted from the low priority queue 106 to the wireless transmission unit 108 as data D107.

  When the low priority queue 106 is connected to the wireless transmission unit 107, although not shown in the figure, the communication means selection unit 109 uses the frame identifier assignment data D104 extracted from the low priority queue 106 as data D108. May be transmitted to the wireless transmission unit 107. Further, the communication means selection unit 109 may confirm the status of the communication environment by using a known function, and transmit the frame identifier assignment data D104 to either the wireless transmission unit 107 or the wireless transmission unit 108.

  Next, the wireless transmission unit 108 checks, for each received data D106 and D107, whether the data amount is equal to or smaller than the predetermined data amount, and if it is equal to or smaller than the predetermined data amount, the priority corresponding to the priority identifier. Multiple data is preferentially multiplexed into a radio frame (S106). The wireless transmission unit 108 performs known modulation / coding processing on the multiplexed wireless frame, and transmits the result as a wireless signal D302 to the wireless transmission path (S107).

  Note that the above-described predetermined data amount is a value set in the wireless transmission unit 107 for each of the data D106 and the data D107 by the user of the present embodiment.

  When either data D106 or data D107 is input, the wireless transmission unit 108 performs a known modulation / coding process on the input data and transmits the input data as a wireless signal D302 to the wireless transmission path. . Similarly, the wireless transmission unit 107 performs the same operation as the wireless transmission unit 108. That is, the wireless transmission unit 107 checks whether the data amount is equal to or less than a predetermined data amount for each input data D105 and D108 not shown in the figure. Are preferentially multiplexed into a radio frame from data with high priority corresponding to (S106). The wireless transmission unit 107 performs known modulation / coding processing on the multiplexed wireless frame, and transmits the result as a wireless signal D301 to the wireless transmission path (S107).

  Note that the above-described predetermined data amount is a value set in the wireless transmission unit 107 for each of the data D105 and the data D108 by the user of the present embodiment.

  When either data D105 or data D108 is input, the wireless transmission unit 107 performs a known modulation / coding process on the input data and transmits the input data as a wireless signal D301 to the wireless transmission path. .

(8) Reception Operation of Reception Unit 150 Next, the operation of the reception unit 150 will be described.

  As illustrated in FIG. 4, the wireless reception unit 151 and the wireless reception unit 152 of the reception unit 150 receive the wireless signal D303 and the wireless signal D304 from the opposing wireless communication device (S201).

  Next, the wireless reception unit 151 and the wireless reception unit 152 perform known demodulation / decoding processing on the received wireless signal D303 and wireless signal D304, and the frame data D151 and data D152 are received by the reception frame recognition unit 153, respectively. It transmits to the identifier duplication determination part 51 (S202).

  Next, the identifier duplication determination unit 51 sets a priority identifier, a sequence number, a size identifier, and transmission data D51 for each frame data received from the wireless reception unit 151 and the wireless reception unit 152 in a predetermined wireless frame. Extract according to the format. Further, the identifier duplication determination unit 51 uses the extracted priority identifier, sequence number, and size identifier as identifier information D153, and stores the identifier information D153 in the received frame identifier storage table 154 (S203). When the same identifier information D153 is already stored in the received frame identifier storage table 154, the identifier duplication determination unit 51 discards the transmission data D51 as the data received redundantly (S204). The identifier duplication determination unit 51 sends the transmission data D51 and the identifier information D153 to the sequence control unit 52 when not discarding.

The identifier duplication determination unit 51 may perform the above extraction / output operation for each received frame data as follows, for example.
(A) First, the identifier duplication determination unit 51 recognizes the head position of the received frame data by a known function.
(B) Next, the identifier duplication determination unit 51 separates the frame identifier at the head position of the received frame data from the received frame data.
(C) Furthermore, the identifier duplication determination unit 51 sets the separated frame identifier as identifier information D153.
(D) Further, the identifier duplication determination unit 51 recognizes the size identifier from the identifier information D153 according to the format of the frame identifier.
(E) Furthermore, the identifier duplication determination unit 51 sets the head of the frame data after the frame identifier as the head position of new frame data.
(F) Next, the identifier duplication determination unit 51 separates data for the data size corresponding to the size identifier from the head position of the new frame data, and sets it as transmission data D51.
(G) The identifier duplication determination unit 51 stores the identifier information D153 in the received frame identifier storage table 154.
(H) When the same identifier information D153 is already stored in the received frame identifier storage table 154 at the time of storage, the identifier duplication determination unit 51 discards the transmission data D51 as data received redundantly.
(I) The identifier duplication determination unit 51 sends the transmission data D51 to the sequence control unit 52 together with the identifier information D153 when not discarding.
(J) The identifier duplication determination unit 51 performs the above-described extraction / output operation from the head position of the remaining data after separating the transmission data D51 as new frame data.

  The above extraction operation is repeated until there is no remaining data.

  Next, the sequence control unit 52 temporarily stores the received transmission data D51 and identifier information D153 in the buffer 53 for each priority identifier. At this time, the sequence control unit 52 recognizes the priority identifier and the sequence number from the identifier information D153. The reason why the data is temporarily stored in the buffer 53 is to allow the data to be output to the network first to be rearranged in the sequence order even when transmission delay occurs on the wireless transmission path.

  The sequence control unit 52 rearranges the transmission data D51 and the identifier information D153 temporarily stored in the buffer 53 in order of sequence number for each priority identifier, and outputs the data as frame data D154 to the frame identifier deletion unit 155.

  Note that the sequence control unit 52 may perform the above-described output operation once per radio frame, or may execute it for each of a plurality of radio frames depending on the priority identifier.

  Finally, the frame identifier deletion unit 155 deletes the identifier information D153 from the received frame data D154 and outputs it as transmission data D155 to the network.

[Description of effects]
The wireless communication apparatus according to the present embodiment can sufficiently improve the utilization efficiency of the wireless band even when data requiring high communication quality and data allowing low communication quality are transmitted simultaneously. The radio communication apparatus according to the present embodiment multiplexes data requiring high communication quality and data allowing low communication quality in one radio frame if the data requiring high communication quality is less than a predetermined amount of data. This is because transmission is performed in one frequency band.

  Note that the wireless communication apparatus according to the present embodiment transmits high-priority data requiring high communication quality through two wireless transmission paths, and therefore can suppress data loss as in Patent Document 1. . In addition, since the wireless communication apparatus according to the present embodiment transmits low-priority data, which may have low communication quality, by distributing wireless transmission paths, it is possible to improve the utilization efficiency of the wireless band as in Patent Document 1. it can.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

[Description of configuration]
FIG. 5 is a diagram illustrating a configuration example of a wireless communication system to which the wireless communication apparatus according to the second embodiment of the present invention is applied. As shown in FIG. 5, the wireless communication system to which the wireless communication apparatus according to the second embodiment is applied includes two identical wireless communication apparatuses having the same configuration and function. In FIG. 5, a wireless device A 400 and a wireless device B 500 are illustrated as wireless communication devices.

  The wireless device A 400 and the wireless device B 500 are connected to each other via a wireless transmission path of the same frequency band via an OMT (Orthogonal mode transducer) 601 that is a quadrature demultiplexer.

  As illustrated in FIG. 5, the wireless communication apparatus according to the second embodiment of the present invention includes a wireless transmission unit 407 and a wireless transmission unit 408 instead of the wireless transmission unit 107 and the wireless transmission unit 108. The wireless communication apparatus according to the second embodiment of the present invention includes a wireless reception unit 451 and a wireless reception unit 452 instead of the wireless reception unit 151 and the wireless reception unit 152.

  The wireless transmission unit 407 and the wireless transmission unit 408 modulate the data input from the communication means selection unit 109 using the same frequency band, and transmit the data to the OMT 601 as a wireless signal D601 and a wireless signal D602. The OMT 601 combines two orthogonally polarized waves of the wireless signals D601 and D602, for example, a vertically polarized wave of the wireless signal D601 and a horizontally polarized wave of the wireless signal D602, and generates an orthogonal frequency signal as a wireless propagation path. Send to.

  The OMT 601 separates the orthogonal frequency signal received from the wireless propagation path into two orthogonally polarized waves, for example, a vertically polarized wave and a horizontally polarized wave, and transmits one polarized wave to the wireless receiving unit 451 as a wireless signal D603. Then, the other polarization is transmitted to the wireless reception unit 452 as a wireless signal D604. The radio reception unit 451 and the radio reception unit 452 receive the radio signal D603 or the radio signal D604 from the OMT 601 and demodulate them in the same frequency band.

  Since configurations other than those described above are the same as those of the wireless communication system to which the wireless communication apparatus according to the first embodiment is applied, the same reference numerals are given and description thereof is omitted.

[Description of operation]
In the wireless communication apparatus according to the second embodiment, operations of the wireless transmission unit 407, the wireless transmission unit 408, the wireless reception unit 451, and the wireless reception unit 452 are different from the operations of the first embodiment.

  The wireless transmission unit 407 and the wireless transmission unit 408 modulate the data input from the communication means selection unit 109 using the same frequency band, and transmit the data to the OMT 601 as a wireless signal D601 and a wireless signal D602.

  Next, the OMT 601 combines two orthogonally polarized waves of the wireless signals D601 and D602, for example, a vertically polarized wave of the wireless signal D601 and a horizontally polarized wave of the wireless signal D602 by a known technique, and is orthogonalized. As a frequency signal, it is transmitted to the radio propagation path.

  The OMT 601 separates the orthogonal frequency signal received from the wireless propagation path into two orthogonally polarized waves, for example, a vertically polarized wave and a horizontally polarized wave by a known technique, and sets one polarized wave as the wireless signal D603. One polarization is defined as a radio signal D604. The OMT 601 transmits the radio signal D603 to the radio reception unit 451 and the radio signal D604 as the radio signal D604 to the radio reception unit 452.

  Next, the radio reception unit 451 and the radio reception unit 452 receive the radio signal D603 or the radio signal D604 from the OMT 601 and demodulate them in the same frequency band.

  Since other operations are the same as those in the first embodiment, detailed description thereof is omitted.

[Description of effects]
Since the radio communication system according to the present embodiment transmits signals from two communication means in one frequency band, the use efficiency of the radio band can be improved. In addition, since the wireless communication system according to the present embodiment can transmit data requiring high communication quality with two communication means with redundancy, as in Patent Document 1, it suppresses data loss. be able to.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.

[Description of configuration]
FIG. 6 is a diagram illustrating a configuration example of a wireless communication apparatus according to the third embodiment of the present invention.

(9) Configuration of Radio Communication Device in Third Embodiment First, the configuration of the radio communication device in the third embodiment will be described.

  As shown in FIG. 6, the wireless communication apparatus according to the third embodiment of the present invention uses a wireless transmission unit 850-1 instead of the wireless transmission unit 107, the wireless transmission unit 108, the wireless reception unit 151, and the wireless reception unit 152. To n and radio receiving units 900-1 to 900-n. Here, the subscript n means the number of wireless transmission units and wireless reception units.

  Further, as shown in FIG. 6, the wireless communication apparatus according to the third embodiment of the present invention includes a communication means selection unit 809 having a plurality of queues 805-1 to 805 -k instead of the communication means selection unit 109. Prepare. Here, the subscript k means the number of priorities indicated by the priority information bits. For example, when the priority information bits are 3 bits, k is 8 because there are 8 priorities from 0 to 7.

  The communication means selection unit 809 and the wireless transmission units 850-1 to 850-n are connected to each other.

  Furthermore, the wireless communication apparatus according to the third embodiment of the present invention includes a class determination unit 802 instead of the class determination unit 102, as shown in FIG.

(10) Functions of each part constituting the wireless communication apparatus in the third embodiment Functions of each part constituting the wireless communication apparatus in the third embodiment will be described.

(10-1) Function of Class Determination Unit 802 The class determination unit 802 outputs priority information bits included in the input transmission data.

(10-2) Function of Communication Means Selection Unit 809 The communication means selection unit 809 confirms the priority identifier of the input frame identifier assignment data, and stores the frame identifier assignment data in the queue for each priority. Furthermore, the communication means selection unit 809 outputs the data of the queue that stores the frame identifier assignment data having a priority higher than the predetermined priority in the queue to all output destinations. Further, the communication means selection unit 809 transmits the data of the queue storing the frame identifier giving data with the priority equal to or lower than the predetermined priority to at least a part of the output destination. The predetermined priority is a value set in the communication means selection unit 809 by the user of the present embodiment.

(10-3) Functions of Radio Transmission Units 850-1 to 850-n The radio transmission units 850-1 to 850-n each have a priority corresponding to the priority identifier when each input data is equal to or less than a predetermined data amount. Priority is given to the high data, and it multiplexes with the radio frame by which the format was defined previously. The wireless transmission units 850-1 to 850-n perform a known modulation / coding process on the multiplexed wireless frames and output as wireless signals.

(10-4) Functions of Radio Receiving Units 900-1 to 900-n The radio receiving units 900-1 to 900-n perform known demodulation / decoding processing on the input radio signals and output them as frame data.

  Since configurations other than those described above are the same as those of the wireless communication system to which the wireless communication apparatus according to the first embodiment is applied, the same reference numerals are given and description thereof is omitted.

[Description of operation]
First, the class determination unit 802 transmits the priority information bits included in the transmission data D101 input from the network to the frame identifier generation unit 103 as it is.

  Next, the communication means selection unit 809 confirms the priority of the input frame identifier assignment data D104 from the priority identifier, and stores the frame identifier assignment data D104 in the queues 805-1 to 805k for each priority. . For example, when the communication means selection unit 809 confirms that the priority of the frame identifier data D103 is 3, the communication means selection unit 809 may store the frame identifier provision data D104 in the queue 805-3.

  Next, the communication means selection unit 809 transmits frame identifier giving data D104 having a priority higher than a predetermined priority to all the wireless transmission units 850-1 to 850-n. In addition, the communication means selection unit 809 transmits frame identifier assignment data D104 having a priority equal to or lower than a predetermined priority to at least a part of the wireless transmission units 850-1 to 850-n. The predetermined priority is a value set in the communication means selection unit 809 by the user of the present embodiment.

  Next, when the data received from the communication means selection unit 109 is less than or equal to a predetermined amount of data, the wireless transmission units 850-1 to 850-1n prioritize the data with higher priority corresponding to the priority identifier. , And multiplexed into a radio frame having a predetermined format. Then, the wireless transmission units 850-1 to 850-n perform a known modulation / coding process on the multiplexed wireless frame, and transmit the result to the wireless transmission path as a wireless signal.

  Next, the radio receiving units 900-1 to 900-n of the opposing radio communication apparatuses perform known demodulation / decoding processing on the radio signal and transmit the frame data to the identifier duplication determination unit 51 of the received frame recognition unit 153. .

  Since other operations are the same as those in the first embodiment, detailed description thereof is omitted.

[Description of effects]
Since the wireless communication system of this embodiment uses a plurality of communication means and uses many different frequency bands, it has the ability to maintain communication quality compared to the first embodiment for data that requires high communication quality. Can be increased.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described.

[Description of configuration]
FIG. 7 is a diagram illustrating a configuration example of a radio communication system to which the radio communication apparatus according to the fourth embodiment of the present invention is applied. In the wireless communication system according to the fourth embodiment, the wireless communication apparatus 1000 and the wireless communication apparatus 2000 facing the wireless communication apparatus 1000 perform wireless communication.

  The wireless communication apparatus 1000 includes a plurality of communication units 1100-1 to 1100-i, a class determination unit 1200, a frame identifier assignment unit 1300, and a communication unit selection unit 1400. Here, the subscript i means the number of communication means.

  The class determination unit 1200 determines the priority of the input transmission data.

  The frame identifier assigning unit 1300 generates transmission data to which at least a priority identifier and a sequence number corresponding to the priority determined by the class determining unit 1200 are added to the input transmission data.

  The communication means selection unit 1400 inputs the transmission data to at least a part of the communication means 1100-1 to i depending on the priority indicated by the priority identifier.

  When a plurality of pieces of transmission data are input from the communication unit selection unit 1400, the communication units 1100-1 to 1100-1i check whether the data amount is equal to or less than a predetermined data amount for each transmission data. The communication units 1100-1 to 1100-1, if each transmission data is equal to or less than a predetermined amount of data, multiplexes the transmission data having a high priority corresponding to the priority identifier in a pre-defined radio frame. Then, it transmits to the wireless transmission line in a predetermined frequency band. Here, the above-described predetermined data amount and predetermined frequency are values set by the user of the present embodiment in the communication means 1100-1 to i.

  The wireless communication apparatus 2000 includes a plurality of communication units 2100-1 to 2100-j and a received frame recognition unit 2200. Here, the subscript j means the number of communication means. The plurality of communication units 2100-1 to 2100-1 perform wireless communication with opposing devices in a predetermined frequency band.

  The reception frame recognition unit 2200 extracts a priority identifier, a sequence number, and transmission data for each reception data received by each of the communication units 2100-1 to 2100-j, and sets at least transmission data and sequence number for each priority identifier. Save temporarily. Reception frame recognition section 2200 outputs transmission data temporarily stored for each priority identifier in the order of sequence numbers.

[Description of operation]
First, the class determination unit 1200 determines the priority of input transmission data.

  Next, the frame identifier assigning unit 1300 generates transmission data in which at least a priority identifier and a sequence number corresponding to the priority determined by the class determining unit 1200 are added to the input transmission data.

  Furthermore, the communication means selection unit 1400 inputs transmission data to at least some of the communication means 1100-1 to i according to the priority indicated by the priority identifier.

  In addition, when a plurality of pieces of transmission data are input from the communication unit selection unit 1400, the communication units 1100-1 to 1100-i confirm whether the data amount is equal to or less than a predetermined data amount for each transmission data. If each transmission data is below a predetermined data amount, the communication means 1100-1 to 1100-i preferentially multiplex the transmission data with a high priority corresponding to the priority identifier into a radio frame, and use a predetermined frequency band. And transmit to the wireless transmission path.

  Next, each of the plurality of communication units 2100-1 to 2100-1 performs wireless communication with an opposite device in a predetermined frequency band.

  Further, the reception frame recognition unit 2200 extracts a priority identifier, a sequence number, and the transmission data for each reception data received by each of the communication units 2100-1 to 2100-1j, and at least the transmission data for each priority identifier. And temporarily store the sequence number. Reception frame recognition section 2200 outputs transmission data temporarily stored for each priority identifier in the order of sequence numbers.

[Description of effects]
The wireless communication apparatus according to the present embodiment can sufficiently improve the utilization efficiency of the wireless band even when data requiring high communication quality and data allowing low communication quality are transmitted simultaneously. The radio communication apparatus according to the present embodiment multiplexes data requiring high communication quality and data allowing low communication quality in one radio frame if the data requiring high communication quality is less than a predetermined amount of data. This is because transmission is performed in one frequency band.

  The embodiment described above is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage.

51 identifier duplication determination unit 52 sequence control unit 53 buffer 100 wireless device A
DESCRIPTION OF SYMBOLS 101 Transmission part 102 Class determination part 103 Frame identifier production | generation part 104 Frame identifier provision part 105 High priority queue 106 Low priority queue 107 Wireless transmission part 108 Wireless transmission part 109 Communication means selection part 150 Reception part 151 Wireless reception part 152 Wireless reception Unit 153 received frame recognition unit 154 received frame identifier storage table 155 frame identifier deletion unit 200 wireless device B
400 Wireless device A
500 Wireless device B
601 OMT
407 Wireless transmission unit 408 Wireless transmission unit 451 Wireless reception unit 452 Wireless reception unit 802 Class determination unit 805 Queue 809 Communication unit selection unit 850 Wireless transmission unit 900 Wireless reception unit 1000 Wireless communication device 1100 Communication unit 1200 Class determination unit 1300 Frame identifier assignment Unit 1400 communication unit selection unit 2000 wireless communication device 2100 communication unit 2200 received frame recognition unit

Claims (10)

A plurality of communication means for performing wireless communication with opposing devices, each in a predetermined frequency band;
A class determination unit for determining the priority of the input transmission data;
A frame identifier giving unit that generates transmission data to which at least a priority identifier corresponding to the priority determined by the class determining unit and a sequence number is assigned to the input transmission data;
A communication means selection unit for inputting the transmission data to at least a part of the communication means according to the priority corresponding to the priority identifier;
With
When a plurality of the transmission data is input from the communication means selection unit, the communication unit checks whether the data amount is equal to or less than a predetermined data amount for each transmission data, and determines a predetermined data amount. If it is below, the transmission data having a high priority corresponding to the priority identifier is preferentially multiplexed in a wireless frame having a predetermined format and transmitted to a wireless transmission path.
A wireless communication apparatus. The communication means selection unit
For the transmission data whose priority corresponding to the priority identifier is higher than a predetermined priority, input to all of the communication means,
The transmission data whose priority corresponding to the priority identifier is equal to or lower than a predetermined priority is input to a part of the communication means.
The wireless communication apparatus according to claim 1. The communication means selection unit temporarily stores the transmission data for each priority corresponding to the priority identifier.
The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus is a wireless communication apparatus. The wireless communication apparatus includes two communication units connected to the communication unit selection unit.
The wireless communication device according to claim 1, wherein the wireless communication device is a wireless communication device. A plurality of communication means for performing wireless communication with opposing devices, each in a predetermined frequency band;
For each received data received by each communication means, a priority identifier corresponding to the priority of transmission data to be output, a sequence number, and the transmission data are extracted according to a predetermined radio frame format, and the priority A reception frame recognition unit that temporarily stores at least the transmission data and a sequence number for each identifier;
With
The wireless communication apparatus, wherein the reception frame recognition unit outputs the transmission data temporarily stored for each priority identifier in the order of the sequence numbers. The received frame recognizing unit extracts, from the received data, a size identifier corresponding to the data size of the transmission data transmitted by the opposite device, the wireless communication device, the priority identifier, the size identifier, and the A reception frame identifier storage table for storing a reception frame identifier corresponding to a combination of sequence numbers for a predetermined period;
The received frame recognition unit stores the received frame identifier, which is a combination of the extracted priority identifier, the sequence number, and the size identifier, in the received frame identifier storage table. 6. The wireless communication apparatus according to claim 5, wherein the received data of the received frame identifier is discarded when stored in the frame identifier storage table.   The wireless communication apparatus according to claim 5, wherein the wireless communication apparatus includes the two communication units connected to the reception frame recognition unit. A wireless communication device and a wireless communication device opposite to the wireless communication device perform wireless communication in a plurality of frequency bands,
The wireless communication device is the wireless communication device according to any one of claims 1 to 4,
The wireless communication device facing the wireless communication device is the wireless communication device according to any one of claims 5 to 7.
A wireless communication system. A wireless communication system in which a wireless communication device and a wireless communication device opposed to the wireless communication device perform wireless communication in one frequency band,
The wireless communication device is the wireless communication device according to any one of claims 1 to 4,
The wireless communication device facing the wireless communication device is the wireless communication device according to any one of claims 5 to 7,
The wireless communication device and the wireless communication device facing the wireless communication device perform wireless communication via an orthogonal polarization demultiplexer.
A wireless communication system. A wireless communication method in which a wireless communication device and a wireless communication device facing the wireless communication device perform wireless communication,
The wireless communication device is a wireless communication device comprising a plurality of communication means for performing wireless communication with a device facing each other in a predetermined frequency band,
Determine the priority of the input transmission data,
For the input transmission data, generate transmission data to which at least a priority identifier and a sequence number corresponding to the priority determined by the class determination unit are given,
The transmission data is input to at least a part of the communication means according to the priority corresponding to the priority identifier,
When a plurality of the transmission data is input from the communication means selection unit, the communication unit checks whether the data amount is equal to or less than a predetermined data amount for each transmission data, and determines a predetermined data amount. If it is below, the transmission data having a high priority corresponding to the priority identifier is preferentially multiplexed in a wireless frame having a predetermined format and transmitted to a wireless transmission path,
The wireless communication device facing the wireless communication device is the wireless communication device including a plurality of communication means for performing wireless communication with the facing device in a predetermined frequency band,
For each received data received by each communication means, a priority identifier corresponding to the priority of transmission data to be output, a sequence number, and the transmission data are extracted according to a predetermined radio frame format, and the priority Temporarily store at least the transmission data and sequence number for each identifier;
Outputting the transmission data temporarily stored for each priority identifier in the sequence number order;
A wireless communication method.

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