JP2012169845A - Wireless device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless device allowing wireless transmission delay time to fall within a predetermined range by transmitting data having high priority level when a radio band is insufficient.SOLUTION: A cable signal termination section 110 receives a cable signal of transmission data from a wired device, and outputs the cable signal to a data identification destruction section 140. A transmission method control section 120 determines whether it is a state of exceeding a radio band on the basis of radio propagation state information and, when it is the state of exceeding the radio band, determines a radio transmission method corresponding to the state. The transmission method control section 120 outputs the determined radio transmission method to a radio transmission section 130 and the data identification destruction section 140. On the basis of a filtering setting table 150a, the data identification destruction section 140 performs filtering processing with respect to the radio transmission method, and outputs the transmission data after being subjected to filtering processing to the radio transmission section 130. The radio transmission section 130 converts the transmission data to a radio signal on the basis of the radio transmission method, and transmits the radio signal.

Description

  The present invention relates to a radio apparatus, and more particularly, to a radio apparatus that transmits data by switching a radio transmission system such as a modulation system or encoding.

  In a wireless device, when a large amount of data such as video is transmitted, a high-speed wireless transmission method with a wide wireless band is used to increase the transmission speed. However, when the radio band is wide, rainfall or obstacles on the radio propagation path affect the transmission, and errors in data to be transmitted may increase, resulting in a decrease in transmission quality. In such a case, the wireless device has to be switched to a low-speed wireless transmission method with a narrow wireless band. For this reason, the wireless device wirelessly selects an optimal modulation method, presence / absence of parity, Reed-Solomon code, etc. according to changes in the state of rainfall or obstacles in the wireless propagation path (hereinafter referred to as wireless propagation path state). The transmission system was switched to reduce errors in data to be transmitted and to prevent deterioration in transmission quality.

  A transmission function and a reception function in the conventional wireless device 30 that switches the wireless transmission method will be described with reference to the drawings. FIG. 8 shows the configuration of the transmission function 500 of the wireless device 30. FIG. 9 shows the configuration of the reception function 600 of the wireless device 30.

  First, the transmission function 500 of the wireless device 30 shown in FIG. 8 will be described. The transmission function 500 includes a wired signal termination unit 510, a transmission method control unit 520, and a wireless transmission unit 530. The wired signal termination unit 510 is an interface with a wired device (not shown) connected to the wireless device 30, receives a wired signal of transmission data from the wired device, and outputs the transmission data to the wireless transmission unit 530. The transmission method control unit 520 determines a wireless transmission method based on the wireless propagation path state information, and outputs the determined wireless transmission method information to the wireless transmission unit 530. Information on the wireless propagation path state is collected by a monitoring function or the like provided in the wireless device 30 and notified to the transmission method control unit 520. When wireless transmission unit information is input from transmission method control unit 520 and transmission data is input from wired signal termination unit 510, wireless transmission unit 530 converts transmission data into a wireless signal based on the determined wireless transmission method. To send. In addition, when the wireless band overflows and the transmission data cannot be transmitted, the wireless transmission unit 530 discards the input transmission data.

  Next, the reception function 600 of the wireless device 30 illustrated in FIG. 9 will be described. The reception function 600 includes a wireless reception unit 610, a transmission method control unit 620, and a wired signal termination unit 630. When receiving the PLCP header information of the wireless signal, the wireless reception unit 610 outputs the PLCP header information to the transmission method control unit 620. In the PLCP header information, wireless transmission method information is set. The PLCP header information will be described later. When the PLCP header information of the wireless signal is input, the transmission method control unit 620 extracts information on the wireless transmission method from the PLCP header information and outputs the information to the wireless reception unit 610. When receiving the wireless transmission method information, the wireless reception unit 610 receives the reception data of the wireless signal by the wireless transmission method set in the PLCP header information, converts the received data into a wired signal, and sends it to the wired signal termination unit 630. Output. When the reception data is input from the wireless reception unit 610, the wired signal termination unit 630 converts it into a wired signal and transmits it to the wired device.

  Such a transmission function 500 can transmit a radio signal while switching a radio transmission method according to a change in a radio propagation path state. In addition, such a reception function 600 can receive a radio signal even when a radio apparatus that transmits the radio signal switches the radio transmission method according to the radio propagation path state. However, when the transmission function 500 is switched to a wireless transmission system with a narrower wireless band according to the state of the wireless propagation path, the wireless band overflows due to a large amount of data transmission requests, and data transmission cannot be performed normally. is there. In such a case, the wireless device 30 had to discard the data requested to be transmitted.

  Next, the transmission function provided with the transmission buffer in the wireless device 40 according to the prior art will be described with reference to the drawings. FIG. 10 shows the configuration of the transmission function 700 of the wireless device 40. The configuration of the reception function of the wireless device 40 is the same as the reception function 600 of FIG.

  The transmission function 700 of the wireless device 40 illustrated in FIG. 10 will be described. The transmission function 700 includes a wired signal termination unit 710, a transmission method control unit 720, a wireless transmission unit 730, and a transmission buffer 740. The wired signal termination unit 710 is an interface with a wired device (not shown) connected to the wireless device 40, receives a wired signal of transmission data from the wired device, and outputs it to the transmission buffer 340. The wired signal termination unit 710 discards the input transmission data when the transmission buffer 740 becomes full. The transmission method control unit 720 determines a wireless transmission method based on the wireless propagation path state information, and outputs the determined wireless transmission method information to the wireless transmission unit 730. Information on the wireless propagation path state is collected by a monitoring function or the like provided in the wireless device 40 and notified to the transmission method control unit 720. When wireless transmission unit information is input from transmission method control unit 720 and transmission data is input from transmission buffer 740, wireless transmission unit 730 converts the transmission data into a radio signal based on the determined wireless transmission method. Send.

  In such a transmission function 700, when the transmission buffer 740 becomes full, the wired signal termination unit 710 must discard the transmission data. That is, when the wireless transmission unit 730 cannot transmit the transmission data when the wireless band overflows, the wireless transmission unit 730 cannot retrieve the transmission data from the transmission buffer 740, so the transmission buffer 740 is full and the transmission data must be discarded. did not become.

  In the wireless device 30 and the wireless device 40 according to the related art, for example, when audio data is transmitted by a VoIP (Voice over Internet Protocol) real-time application, audio data delayed in time becomes unnecessary. Further, data that is only partially transmitted in a state where the data amount exceeds the wireless band is also unnecessary or hinders normal recovery. For example, when video data is transmitted to the display device by a wireless signal, the video data in the tooth missing state is transmitted when the wireless band is exceeded. Next, when the data amount changes from a state exceeding the wireless band to a state not exceeding the wireless band, only a part of the video data is updated. However, such missing tooth video data is not necessary. When the video data in the missing state is transmitted, the display device is in a waiting state until all the video data of the image is received, and the display device receives the video data of the next image until this waiting state times out. I can't. For this reason, the time until a normal image is displayed is extended, which hinders normal recovery. Further, the variation in the transmission time affects the application as fluctuation of the data arrival time in the wired device. In other words, by switching the wireless transmission method according to the fluctuation of the wireless propagation path state, the time until the control command from the wired device reaches the terminal device varies, so control when it is necessary to control within the time The control process is not executed correctly because the arrival of the command is delayed. For example, in a wireless transmission modulation method, “QPSK”, which has a low transfer rate and a low transfer rate, takes twice as long as “16QAM”, three times as long as “64QAM”, and a high transfer rate. It takes 5 times as fast as “1024QAM”.

  Moreover, there is the following Patent Document 1 as a technique in packet transfer of a communication device. In Patent Document 1, a plurality of buffers for wireless transmission are prepared in accordance with the purpose of use in a base station device or a subscriber station device, and stored in each buffer when the wireless communication band is tight. The technology which can perform optimal packet transfer is provided by changing the conditions of packet transfer.

JP 2004-165663 A

  In Patent Document 1, wireless transmission data transfer suitable for data use purposes can be performed by changing packet transfer conditions for each data use purpose. However, if the data volume continues to exceed the wireless bandwidth, the problem is that data that is delayed in time is transmitted, the display is restored by discarding part of the data and transmitting data that is missing It cannot cope with the problem that time is taken and the influence on the application as fluctuation of the data arrival time when the wireless transmission method is switched.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a wireless device capable of solving the above-described problems.

  The wireless device of the present invention is determined by a wireless transmission unit, a wireless reception unit, a wired signal termination unit, a transmission method control unit that determines a wireless transmission method and outputs information on the determined wireless transmission method. A data identification discarding unit that identifies and discards data to be discarded based on the information of the wireless transmission method and data input from the wireless reception unit or the wired signal termination unit, and passes other data The data that has passed through the data identification discarding unit is transmitted from the wireless transmission unit or output from the wired signal termination unit.

  According to the present invention, even when the state of exceeding the radio band continues due to the amount of data, the data that is delayed in time is not transmitted. It is possible to provide a wireless device that does not take time and does not affect the application as fluctuation of the data arrival time even when the wireless transmission method is switched.

It is a figure which shows the structure of the transmission function of the radio | wireless apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the reception function of the radio | wireless apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the filtering setting table which concerns on embodiment of this invention. It is a figure which shows the structure of the frame format which concerns on embodiment of this invention. It is a figure which shows the structure of the data format which concerns on embodiment of this invention. It is a figure which shows the structure of the transmission function of the radio | wireless apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the transmission function of the radio | wireless apparatus which concerns on the modification of Embodiment 2 of this invention. It is a figure which shows the structure of the transmission function of the radio | wireless apparatus which concerns on a prior art. It is a figure which shows the structure of the reception function of the radio | wireless apparatus which concerns on a prior art. It is a figure which shows the structure of the transmission function provided with the transmission buffer which concerns on a prior art.

(First embodiment)
The first embodiment for implementing the present invention (hereinafter referred to as the first embodiment) discards data that does not necessarily need to be identified and transmitted when it exceeds the radio band due to the amount of data. It is embodiment to do. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of the transmission function 100 of the wireless device 10 according to the first embodiment. FIG. 2 shows a configuration of the reception function 200 of the wireless device 10 according to the first embodiment.

  The transmission function 100 of the wireless device 10 illustrated in FIG. 1 includes a wired signal termination unit 110, a transmission method control unit 120, a wireless transmission unit 130, a data identification discarding unit 140, and a nonvolatile memory 150. The non-volatile memory 150 stores a filtering setting table 150a. The reception function 200 of the wireless device 10 illustrated in FIG. 2 includes a wireless reception unit 210, a transmission method control unit 220, a wired signal termination unit 230, a data identification discarding unit 240, and a nonvolatile memory 250. The non-volatile memory 250 stores a filtering setting table 250a.

  First, the configuration of the filtering setting table 150a shown in FIG. 3 stored in the nonvolatile memory 150 will be described. The configuration of the filtering setting table 250a stored in the nonvolatile memory 250 is the same as that of the filtering setting table 150a shown in FIG. However, in the following description, “transmission data” is “reception data” in the filtering setting table 250a.

  The filtering setting table 150a includes items of “wireless transmission method” and “filtering process”. The filtering process refers to a process of discriminating data to be transmitted and data not to be transmitted based on the wireless transmission method, discarding the data determined not to be transmitted, and passing other data. The “wireless transmission method” is an item in which the wireless transmission method is set, and “QPSK”, “16QAM”, and “64QAM” of the modulation method are set. “QPSK” is a low modulation rate with a low transfer rate, “16QAM” is a modulation method with a medium transfer rate, and “64QAM” is a high modulation rate with a high transfer rate. The “filtering process” is an item for setting a filtering process program corresponding to the “wireless transmission method”. When the “wireless transmission method” is “QPSK”, processing for discarding data other than SNMP (Simple Network Management Protocol) data is performed. Therefore, a program for the processing is set in the “filtering processing” corresponding to “QPSK”. . Further, when the “wireless transmission method” is “16QAM”, a process for discarding RTP (Real time Transport Protocol) data is performed, and therefore, a program for the processing is set in the “filtering process” corresponding to “16QAM”. The In addition, when the “wireless transmission method” is “64QAM”, data is not discarded, so that “filtering processing” corresponding to “64QAM” is blank and no program is set. By setting the filtering setting table 150a in this way, even if the modulation method is switched to “QPSK” and the state where the wireless band is exceeded, data other than SNMP data is discarded to monitor or control data. Can only pass through. Also, even when the modulation system is switched to “16QAM” and the state of exceeding the radio band continues, video and audio data can be prevented from passing by discarding the RTP data. Further, when the state exceeding the radio band is restored and the modulation method is switched to “64QAM”, the data is not discarded, so that all data can be passed.

  Next, a frame configuration for wireless communication will be described. FIG. 4 shows a configuration of an IEEE 802.11 frame format 900 which is an example of a wireless communication frame. FIG. 5 shows a configuration of Data 940 provided in the IEEE 802.11 frame format 900. FIG. 5A shows a configuration of UDP packet (IPv4) data 940 a as an example of Data 940. FIG. 5B shows the configuration of RTP packet (RFC3550) data 943a as an example of data 943. The configuration of the IEEE 802.11 frame format 900, the configuration of the UDP packet (IPv4) data 940a and the RTP packet (RFC3550) data 943a, and data related to the first embodiment will be described below.

  An IEEE 802.11 frame format 900 shown in FIG. 4 includes items of a PLCP preamble 910, a PLCP header 920, an IEEE 802.11 header 930, a Data 940, and an FCS 950. The PLCP preamble 910 and the PLCP header 920 are physical headers. The IEEE 802.11 header 930, Data 940, and FCS 950 are MAC frames (PSDUs). The PLCP header 920 is the PLCP header information described above, and the modulation scheme information (information such as transmission speed and data length) of the wireless transmission scheme is set in the PLCP header 920. The UDP packet (IPv4) data 940a shown in FIG. 5A is a data configuration as an example of the Data 940 shown in FIG. The UDP packet (IPv4) data 940a includes items of an IP header, a transmission source port 941, a destination port 942, a data length, a checksum, and data 943. A transmission source port number is set in the transmission source port 941, and a destination port number is set in the destination port 942. The RTP packet (RFC3550) data 943a shown in FIG. 5 (2) is a data configuration as an example of the data 943 of the UDP packet (IPv4) data 940a shown in FIG. 5 (1). RTP packet (RFC3550) data 943a includes V (version), P (padding), X (extended), CC (CSRC count), M (marker), PT (payload type), sequence number, time stamp, SSRC (transmission) Source ID), CSRC (contributing node ID), and real-time data 944. In the real-time data 944, data to be transmitted or received in real time such as video and audio is set.

  Next, the transmission function 100 of the wireless device 10 shown in FIG. 1 will be described. The wired signal termination unit 110 is an interface with a wired device (not shown) connected to the wireless device 10, receives a wired signal of transmission data from the wired device, and outputs the transmission data to the data identification discarding unit 140. The transmission method control unit 120 determines a wireless transmission method corresponding to the wireless propagation path state based on the wireless propagation path state information. Then, the transmission method control unit 120 outputs information on the determined wireless transmission method to the wireless transmission unit 130 and the data identification discarding unit 140. Information on the radio propagation path state (for example, electric field strength, bit error rate BER, etc.) is collected by a monitoring function provided in the radio apparatus 10 and notified to the transmission method control unit 120. The data identification discarding unit 140 receives information on the wireless transmission method from the transmission method control unit 120, receives transmission data from the wired signal termination unit 110, and further reads the filtering setting table 150a from the nonvolatile memory 150. Next, the data identification discarding unit 140 executes “filtering processing” for the “wireless transmission method” determined based on the filtering setting table 150a. By executing this process, transmission data input from the wired signal termination unit 110 is filtered. Next, the data identification discarding unit 140 outputs the filtered transmission data to the wireless transmission unit 130. When wireless transmission unit information is input from transmission method control unit 120 and transmission data is input from data identification discarding unit 140, wireless transmission unit 130 converts the transmission data into a radio signal based on the determined wireless transmission method. Then send.

  In such a transmission function 100, for example, when the “wireless transmission method” is “QPSK”, the “filtering process” is “PRG1”. Therefore, the transmission port number shown in FIG. 161, the transmission data of the destination port number 162 is allowed to pass, and the other transmission data is discarded. As a result, the data other than the SNMP data can be discarded and only the monitoring / control data can be passed. When the “wireless transmission method” is “16QAM”, the “filtering process” is “PRG2”. Therefore, the source port number 5004 and the destination port number 5005 shown in FIG. Processing for discarding transmission data and passing other transmission data is performed. Accordingly, the video / audio data can be prevented from passing by discarding the RTP packet data shown in FIG. Further, when the “wireless transmission method” is “64QAM”, the “filtering process” is “blank”, and thus all transmission data is allowed to pass.

  Next, the reception function 200 of the wireless device 10 illustrated in FIG. 2 will be described. When receiving the wireless signal, the wireless receiving unit 210 outputs PLCP header information to the transmission method control unit 220. In the PLCP header information, wireless transmission method information is set. When the transmission method control unit 220 receives PLCP header information of a wireless signal, the transmission method control unit 220 determines wireless transmission method information from the PLCP header information and outputs the information to the wireless reception unit 210. When receiving information on the wireless transmission method, the wireless reception unit 210 receives the reception data of the wireless signal by the wireless transmission method set in the PLCP header information, and outputs the received data to the data identification discarding unit 240. The data identification discarding unit 240 receives information on the wireless transmission method from the transmission method control unit 220, receives reception data from the wireless reception unit 210, and further reads the filtering setting table 250 a from the nonvolatile memory 250. Next, the data identification discarding unit 240 executes “filtering processing” for the “wireless transmission method” set in the PLCP header information based on the filtering setting table 250a. By executing this process, the reception data input from the wireless reception unit 210 is filtered. Next, the data identification discarding unit 240 outputs the received data subjected to the filtering process to the wired signal termination unit 230. When the reception data is input from the data identification discarding unit 240, the wired signal termination unit 230 converts the reception data into a wired signal and transmits it to the wired device.

  According to the transmission function 100 of the first embodiment, the wireless transmission method is switched according to the state of the wireless propagation path, and even when the state exceeding the wireless band continues due to the amount of data, the switched wireless transmission method is supported. A radio signal can be transmitted while filtering transmission data by the filtering process. In addition, the reception function 200 according to the first embodiment can receive a radio signal even when a radio apparatus that transmits a radio signal switches the radio transmission scheme, and further supports the switched radio transmission scheme. The wired signal that has been subjected to the filtering process can be output to the wired device.

(Second Embodiment)
A second embodiment (hereinafter referred to as a second embodiment) for carrying out the present invention is an embodiment provided with a transmission buffer in the radio apparatus 20. Embodiment 2 of the present invention will be described below with reference to the drawings. FIG. 6 shows the transmission function 300 of the wireless device 20 in the second embodiment. The reception function of the wireless device 20 is the same as the reception function 200 of FIG.

  First, the transmission function 300 of the wireless device 20 illustrated in FIG. 6 will be described. The transmission function 300 includes a wired signal termination unit 310, a transmission method control unit 320, a wireless transmission unit 330, a data identification discard unit 340, a nonvolatile memory 350, and a transmission buffer 360. The non-volatile memory 350 stores a filtering table 350a. The wired signal termination unit 310 is the wired signal termination unit 110 of the first embodiment, the transmission method control unit 320 is the transmission method control unit 120 of the first embodiment, and the filtering setting table 350a is the same as the filtering setting table 150a of the first embodiment. . Hereinafter, processing different from that of the first embodiment will be described.

  The data identification discarding unit 340 receives information on the wireless transmission method determined from the transmission method control unit 320, receives transmission data from the wired signal termination unit 310, and further reads the filtering setting table 350a from the nonvolatile memory 350. Include. Next, the data identification discarding unit 340 executes “filtering processing” for the “wireless transmission method” determined by the transmission method control unit 320 based on the filtering setting table 350a. By executing this processing, transmission data input from the wired signal termination unit 310 is filtered. Next, the data identification discarding unit 340 outputs the filtered transmission data to the transmission buffer 360. When wireless transmission system information is input from transmission system control unit 320 and transmission data is input from transmission buffer 360, wireless transmission unit 330 converts the transmission data into a wireless signal based on the determined wireless transmission system and transmits the transmission data. To do.

  According to the transmission function 300 of the second embodiment, even when the wireless transmission method is switched according to the state of the wireless propagation path and the state where the wireless band exceeds the data amount continues, the transmission data may be filtered. When there is no empty radio band, transmission data can be temporarily stored in the transmission buffer 360 without being discarded.

  FIG. 7 shows a transmission function 300a that is a modification of the second embodiment. As shown in the transmission function 300a, it is also possible to provide a transmission buffer 360 between the wired signal termination unit 310 and the data identification discarding unit 340. With this configuration, the transmission data is temporarily stored in the transmission buffer 360 by the wired signal termination unit 310, so that the data identification discarding unit 340 performs the filtering process without being affected by the amount of transmission data from the wired device. It can be carried out.

  Note that a reception buffer can also be provided for the reception function 200 shown in FIG. 2 of the first embodiment. For example, by providing a reception buffer between the wireless reception unit 210 and the data identification discarding unit 240, the reception data is temporarily stored in the reception buffer by the wireless reception unit 210, so that the amount of received data from the wireless reception unit 210 is increased. Without being affected, the data identification discarding unit 240 can perform the filtering process. Further, by providing a reception buffer between the data identification discarding unit 240 and the wired signal termination unit 230, the wired signal termination unit 230 processes the received data without being affected by the amount of data received from the data identification discarding unit 240. be able to.

  In the first and second embodiments, the “wireless transmission method” is switched based on the state of the wireless band, and the “filtering process” corresponding to the “wireless transmission method” is performed. A “priority level” (for example, priority level 1, priority level 2, etc. in descending order of priority) is determined for each (for example, control data, monitoring data, video data, audio data, etc.). It is also possible to correspond “priority level” (for example, “QPSK” corresponds to priority level 1, “16QAM” corresponds to priority level 1 and priority level 2, “64QAM” corresponds to all priority levels, etc.). In this way, by associating the “priority level” with the “wireless transmission method”, it is possible to transmit only transmission data corresponding to the “priority level”.

  In addition, the wired signal termination | terminus part in Embodiment 1 and Embodiment 2 is not limited to this, By making a wired signal termination | terminus part into a wireless signal termination | terminus part, the radio | wireless apparatus 10 and the radio | wireless apparatus 20 can relay a radio signal. it can.

  According to the first embodiment and the second embodiment, even when a state exceeding the radio band continues due to the amount of data, the data delayed in time is not transmitted, and some data is discarded and the data in the missing state is transmitted. Therefore, it is possible to provide a wireless device that does not take time to return the display and that does not affect the application as fluctuation of the data arrival time even when the wireless transmission method is switched. That is, the wireless devices according to the first and second embodiments switch the wireless transmission method according to the wireless propagation path state, and filter the transmission data relayed from the wired device according to the switched wireless transmission method. Even when the wireless transmission rate is reduced and the wireless band is insufficient, transmission data with a high priority level can be preferentially wirelessly transmitted. In addition, since the wireless devices according to the first and second embodiments switch to at least one wireless transmission method and filter transmission data with an identification pattern corresponding to the wireless transmission method, the wireless transmission speed is improved by adaptive modulation. Even in the case where the wireless bandwidth is insufficient due to the decrease, transmission data having a high priority level can be preferentially transmitted according to the identification pattern. As described above, the radio apparatuses according to the first and second embodiments transmit only transmission data having a high priority level even when the radio transmission speed is reduced due to adaptive modulation and the radio band is insufficient. Can fall within a predetermined range.

  As mentioned above, although this invention was demonstrated by specific embodiment, it cannot be overemphasized that the said embodiment is an illustration of this invention and is not limited to this embodiment.

The characteristics of the above embodiment are summarized as follows.
(1) A wireless device of the present invention includes a wireless transmission unit, a wireless reception unit, a wired signal termination unit, a transmission method control unit that determines a wireless transmission method and outputs information on the determined wireless transmission method A data identification discarding unit that identifies and discards the data to be discarded with respect to the data input from the wireless reception unit or the wired signal termination unit, and passes the others, and the determined information of the wireless transmission method And the data transmitted through the data identification discarding unit is transmitted from the wireless transmission unit or output from the wired signal termination unit.
(2) The wireless device of (1) is characterized in that the transmission method control unit determines the wireless transmission method based on a wireless propagation path state.
(3) The wireless device of (1) is characterized in that the transmission method control unit determines a wireless transmission method based on PLCP header information received by the wireless reception unit.
(4) In the wireless device according to any one of (1) to (3), the transmission method control unit outputs the wireless transmission method information to the wireless transmission unit, or the wireless reception unit transmits the wireless transmission method information. It is characterized by inputting information.
(5) The wireless device according to any one of (1) to (4) includes a first transmission buffer that temporarily stores the passed data, and the data identification discarding unit stores the passed data in the first The wireless transmission unit takes out the passed data from the first transmission buffer.
(6) The wireless device according to any one of (1) to (5) includes a second transmission buffer that temporarily stores data requested to be transmitted, and the data requested to be transmitted is stored in the second transmission buffer. The data identification discarding unit retrieves the requested data from the second transmission buffer.
(7) The wireless device according to any one of (1) to (6) includes a filtering setting storage unit that stores a filtering setting table in which processing of the data identification discarding unit corresponding to the wireless transmission scheme is set. It is characterized by.
(8) The passing data of any one of (1) to (7) is SNMP data.
(9) The data to be discarded of the wireless device according to any one of (1) to (8) is video or audio data.
(10) The data identification discarding unit of the wireless device according to any one of (1) to (9) is characterized in that the data to be passed and the data to be discarded are identified based on the priority set in the data. .
(11) The wireless device according to any one of (1) to (10) includes a first reception buffer that temporarily stores received data, and the wireless reception unit stores the received data in the first reception buffer. The data identification discarding unit retrieves data from the first reception buffer.
(12) The wireless device according to any one of (1) to (11) includes a second reception buffer that temporarily stores the passed data, and the data identification discarding unit stores the passed data in the second The wired signal terminator takes out the passed data from the second reception buffer.
(13) A wireless device according to the present invention includes a wireless transmission unit, a wireless reception unit, a wired signal termination unit, a transmission method control unit that determines a wireless transmission method and outputs information on the determined wireless transmission method A data identification discarding unit that identifies and discards data to be discarded based on the determined information of the wireless transmission method and data input from the wireless reception unit or the wired signal termination unit, and passes the others When the data is input from the wired signal termination unit, the data transmitted through the data identification discard unit is transmitted from the wireless transmission unit. When the data is input from the wireless reception unit, the data is transmitted through the data identification discard unit. Is output from the wired signal termination unit.
(14) A wireless device of the present invention includes a wireless transmission unit, a wireless reception unit, a wired signal termination unit, a transmission method control unit that determines a wireless transmission method and outputs information on the determined wireless transmission method A data identification discarding unit that identifies and discards data to be discarded based on the determined information of the wireless transmission method and data input from the wireless reception unit or the wired signal termination unit, and passes the others When the data is input from the wired signal termination unit, the data transmitted through the data identification discard unit is transmitted from the wireless transmission unit. When the data is input from the wireless reception unit, the data is transmitted through the data identification discard unit. Is output from the wired signal termination unit or the wireless transmission unit.
(15) According to the data control method of the wireless device of the present invention, a wireless transmission step, a wireless reception step, a wired signal termination step, a transmission for determining a wireless transmission method and outputting information of the determined wireless transmission method Data for identifying and discarding data to be discarded based on the method control step, the determined information of the wireless transmission method and the data input from the wireless reception step or the wired signal termination step, and the other data to be passed An identification discarding step, wherein data that has passed through the data identification discarding step is transmitted from the wireless transmission step or output from the wired signal termination step.

  The present invention is suitable for a wireless device, but is not limited to a wireless device, and can be applied to any device that performs communication.

10, 20, 30, 40 ... wireless devices 100, 300, 300a, 500, 700 ... transmission functions 110, 230, 310, 510, 630, 710 ... wired signal termination units 120, 220, 320, 520, 620, 720... Transmission method control unit 130, 330, 530, 730 ... wireless transmission unit 140, 240, 340 ... data identification discarding unit 150, 250, 350 ... non-volatile memory 150a, 250a, 350a, ... Filtering setting table 200, 600 ... Reception function 210, 610 ... Wireless reception unit 360, 740 ... Transmission buffer 900 ... IEEE802.11 frame format 910 ... PLCP Preamble 920... PLCP header 930... IEEE 802.11 header 940. Data
940a ··· UDP packet (IPv4) data 941 ··· Transmission source port 942 ··· Destination port 943 ··· Data 943a · · RTP packet (RFC3550) data 944 ··· Real-time data 950 ··· FCS

Claims (1)

A wireless transmitter;
A wireless receiver;
A wired signal termination,
A transmission method controller for determining a wireless transmission method and outputting information of the determined wireless transmission method;
A data identification discarding unit that identifies and discards data to be discarded based on the determined information of the wireless transmission method and data input from the wireless reception unit or the wired signal termination unit, and passes the others;
With
A wireless device that transmits data that has passed through the data identification discarding unit from the wireless transmission unit or outputs the data from the wired signal termination unit.

Images