Radio communication equipment

The present invention relates to a wireless communication device that performs wireless data communication, and more particularly to a wireless communication device that can control transmission processing according to a state of a wireless line.

[0002] Conventional technology In conventional wireless communication, the state of a wireless line may deteriorate due to shielding, fading, or the like, and the quality of transmitted data may deteriorate. Therefore, it is necessary to compensate for the transmitted data. FIG. 5 is a block diagram showing, for example, a circuit configuration of a conventional wireless communication device shown in Japanese Patent Application Laid-Open No. 63-268326. In FIG. 5, 11 is a CPU, 12 is a line checking means, 13 is a line state determining means, 14 is a transmission mode determining means, 15 is a mode specifying means, and 16 is a transmitting / receiving unit. Further, FIG. 6 is a conceptual diagram of a control signal and a data signal communicated between a calling station and a called station by a conventional wireless communication device.

[0003] Next, the operation of the conventional wireless communication device will be described. The calling station controls the transmission / reception unit 16 and periodically sends the line check signal S1 to the called station by the line checking means 12. The called station determines the line status using the line status determining means 13, and sends a return signal S2 indicating the line status determination result to the calling station. At the calling station, the transmission mode determination means 14 determines the transmission mode by the return signal S2, and the transmission mode designation means 15 notifies the called station of the transmission mode designation signal S3.

[0004] For example, when the line check signal S1 that the called station periodically receives from the calling station is checked by the line checking means 12, and the line condition determining means 13 determines that the line condition is good, the transmission quality is relatively high. If the above determination result is not good, the data is transmitted to the called station by using an error correction code having a low transmission quality and using an error correction code having a relatively high transmission quality.

[0005] However, this wireless communication device needs to have a plurality of error correction code circuits and control circuits, which increases the circuit load. In addition, if line deterioration occurs that cannot correct errors even if an error correction code with high transmission quality occurs, the called station cannot receive normal data for the data transmission processing performed by the calling station, and the data Will be retransmitted, leading to an increase in the bandwidth used.

[0006] Further, in the "transmission output control method" shown in Japanese Patent Application Laid-Open No. 61-95626, the transmission station monitors the usage status of the telephone path, and the line quality check code is inserted into the empty call path. The line status is monitored by sending back the result of detecting an error at the receiving station to the opposite station via the control signal line, and the transmitter output is controlled according to the line status.

[0007] In this wireless communication device, when the line condition is bad, the transmitter output increases, and when the data is incorrect, the data is retransmitted, which leads to an increase in the bandwidth used. Further, when the line is congested and there is no free communication path, the line condition monitoring means for inserting and transmitting the line quality check code cannot be applied.

[0008] [Problem to be Solved by the Invention] Since the conventional wireless communication device is configured as described above, in the former wireless communication device, data retransmission processing is performed in a state where the line quality is deteriorated. In the latter wireless communication device, the transmitter output increases, and when the line is congested and there is no free call path, a line quality check code for monitoring the line status can be inserted. Therefore, there is a problem that the line status monitoring means may not function.

[0009] The present invention has been made to solve the above problems, and by performing communication in a state where the line condition is good in wireless data communication, unnecessary data transmission processing is suppressed and data error is prevented. The purpose is to obtain a wireless communication device that can reduce the amount and improve the communication quality. Another object of the present invention is to simplify the monitoring procedure, increase the processing capacity of user data, and obtain a wireless communication device that can efficiently use the transmission buffer.

[Means for Solving the Problems] The wireless communication device according to the present invention transmits a wireless line quality determination pattern from one station side to the other station side, and the other station side receives the wireless communication. The state of the wireless line is determined based on the line quality determination pattern, the determination result is returned to the one station side, and the one station side is sent to the other station side according to the returned determination result. Equipped with a transmission control means that controls the transmission of data<u style="single">The one station side extends the transmission interval of the wireless line quality determination pattern according to the determination result of the state of the returned wireless line, and the transmission interval of the wireless line quality determination pattern to the other station side. Notify the information of</u>It is something like that.

[0011] The wireless communication device according to the present invention includes a transmission buffer unit that buffers data transmitted to a wireless line, a reception buffer unit that buffers data received from the wireless line, and one station to the other station. The determination pattern addition unit for sending the wireless line quality determination pattern, the determination unit for determining the state of the wireless line based on the received wireless line quality determination pattern, and the determination result determined by the determination unit are described. The judgment result notification unit that returns the wireless line quality judgment pattern to the side into which the wireless line quality judgment pattern is inserted and the data input / output to the transmission buffer unit are controlled according to the judgment result returned by the judgment result notification unit to control transmission. It is provided with a transmission buffer control circuit.

[0012] The wireless communication device according to the present invention is limited to the case where it is determined that the state of the wireless line is good based on the determination result returned from the other station side.<u style="single">On the other hand</u>It is provided with a transmission control means for transmitting data to the station side of the above.

[0014] The wireless communication device according to the present invention thins out data that allows deterioration depending on whether the data transmitted to the wireless line is data that allows deterioration or data that does not allow deterioration. The transmission buffer corresponding to the thinned out portion is allocated to the data that does not allow the deterioration.

[0015] The wireless communication device according to the present invention has a predetermined condition as long as the data to be transmitted to the wireless line is data that allows deterioration or data that does not allow deterioration. Based on this, only the data that does not tolerate deterioration is stored in the transmission buffer.

[0016] The wireless communication device according to the present invention transmits a wireless line quality determination pattern from the other station on the receiving side to one station on the transmitting side, and transmits the wireless line quality determination pattern received by the transmitting side. A transmission control means is provided based on which the transmitting side determines the state of the wireless line and controls the transmission of data from the transmitting side to the receiving side according to the determination result.<u style="single">According to the state of the wireless line determined from the wireless line quality determination pattern sent from the receiving side, the transmitting side instructs the receiving side to extend the transmission interval of the wireless line quality determination pattern, and the receiving side. Extends the transmission interval of the wireless line quality determination pattern according to the instruction regarding the extension of the transmission interval.</u>It is something like that.

[0017] The wireless communication device according to the present invention receives a transmission buffer unit that buffers data transmitted to a wireless line, a reception buffer unit that buffers data received from the wireless line, and a wireless line quality determination pattern on the receiving side. A determination pattern addition unit for sending from to the transmission side, a determination unit that receives the wireless line quality determination pattern on the transmission side to determine the state of the wireless line, and the transmission buffer unit according to the determination result by the determination unit. It is provided with a transmission buffer control circuit that controls the input / output of data to and from the transmitting side and controls the transmission of data from the transmitting side to the receiving side.

[0018] In the wireless communication device according to the present invention, data is sent to the receiving side only when the transmitting side determines that the state of the wireless line is good based on the wireless line quality determination pattern sent from the receiving side. Is to be transmitted.

[0020] In the wireless communication device according to the present invention, the state of the wireless line determined from the wireless line quality determination pattern sent from the receiving side and the data transmitted from the transmitting side to the receiving side are data that allow deterioration. The data that allows deterioration is thinned out on the transmitting side according to whether the data is degradable or the data that does not tolerate deterioration, and the transmission buffer corresponding to the thinned out data is allocated to the data that does not tolerate deterioration. Is.

[0021] In the wireless communication device according to the present invention, the state of the wireless line determined from the wireless line quality determination pattern sent from the receiving side and the data transmitted from the transmitting side to the receiving side are data that allow deterioration. Depending on whether the data is deteriorateable or not tolerant of deterioration, if the data is tolerant of deterioration, it is discarded on the transmitting side based on a predetermined condition, and only the data to which deterioration is not tolerated is stored in the transmission buffer. It is a thing.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described. Embodiment 1. FIG. 1 is a block diagram showing a configuration of the wireless communication device of the first embodiment, in which a determination pattern is inserted and transmitted on the transmitting side, and the determination pattern is received and transmitted on the receiving side. The wireless line quality is determined based on the above, the determination result is returned from the receiving side to the transmitting side, and the transmitting side controls the transmission of data based on the result.

In FIG. 1, 1 is a transmission buffer unit (buffering control means), 3a is a buffer memory, and 4 is a transmission buffer control circuit (transmission control means, buffering) that controls input / output of transmission data to the buffer memory 3a. Control means), 6 is a judgment pattern addition unit (transmission control means) for inserting a wireless line quality judgment pattern into transmission data and sending the wireless line quality judgment pattern from the transmission side to the reception side of the transmission data, and ANT1 is transmission. The antenna on the side. 2 is a receive buffer unit, 3b is a buffer memory, 5 is a receive buffer control circuit, 7 is a determination unit (transmission control means) that determines the wireless line quality from the wireless line quality determination pattern inserted in the received signal, 8 Is a judgment result notification unit (transmission control means) that returns the judgment result to the opposite transmitting side, and ANT2 is an antenna on the receiving side. 9 and 10 are transmitters and receivers.

[0024] Next, the operation will be described. In this wireless communication device, the transmission data is buffered by the transmission buffer unit 1 composed of the buffer memory 3a and the transmission buffer control circuit 4 that controls the input / output of the transmission data to the buffer memory 3a, and the determination pattern addition unit. Judgment unit 7 determines the wireless line quality from the data transmission process on the transmitting side that inserts the wireless line quality determination pattern in step 6 and the wireless line quality determination pattern inserted in the signal received from the wireless line, and notifies the determination result. Unit 8 returns the determination result to the opposite transmitting side, and the receiving buffer control circuit 5 performs wireless data communication by data receiving processing on the receiving side that controls input / output of received data to the buffer memory 3b. ..

First, in the transmission buffer unit 1, the transmission buffer control circuit 4 recognizes the determination pattern addition timing information from the determination pattern addition unit 6 and reads data from the buffer memory 3a. The timing information refers to the determination pattern addition start timing and the like, but the determination pattern may be variable, and information such as the addition pattern length is also included in the configuration that enables the use of a plurality of types of pattern lengths.

Next, the determination pattern addition unit 6 adds a determination pattern. Information that should be agreed in advance with the opposite receiving side that receives the determination pattern includes the content of the pattern, the pattern length, the addition position, the addition interval, and the like.

[0027] On the receiving side, the determination pattern is received, and the determination unit 7 determines the wireless line quality. If the transmitting side and the receiving side do not agree on the additional position information of the pattern, it also has a function of searching the pattern.

[0028] The reception buffer control circuit 5 controls writing to the buffer memory 3b based on the wireless line quality determination result by the determination unit 7 on the receiving side, and the determination result notification unit 8 sends the wireless line quality determination result to the transmitting side. I will return it.

[0029] The transmitting side receives the wireless line quality determination result from the opposite receiving side, and if the determination result is good, reads data from the buffer memory 3a and sends it out. If the determination result is not good, the reading of data from the buffer memory 3a is stopped and the transmission buffer unit waits.

[0030] The transmitting side does not transmit user data and transmits only the determination pattern while the line condition is not good. When the wireless line quality determination result returned from the receiving side becomes good, the data reading from the transmission buffer unit 1 is restarted, and the normal data transmission processing is performed.

FIG. 3 is a sequence diagram showing a communication processing operation between a transmitting side and a receiving side in such a wireless communication device.

[0032] The determination pattern may be transmitted from the receiving side. In this case, the determination result notification unit 8 is unnecessary, and the determination pattern addition unit 6 is provided on the receiving side and the determination unit 7 is provided on the transmitting side. Become. FIG. 2 is a block diagram showing an example of a wireless communication device when such a determination pattern is transmitted from the receiving side. In FIG. 2, the same or corresponding parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. In such a configuration, the wireless line monitoring procedure can be simplified by transmitting the wireless line quality judgment pattern from the receiving side to the transmitting side, the processing capacity of the user data is enhanced, and the data according to the good or bad line condition. It is possible to determine whether or not to execute the transmission process, and it is possible to improve the communication quality by preventing the data transmission process from being performed when the line condition is poor.

[0033] Further, a configuration is also considered in which the interval at which the determination pattern is added is variable on the transmitting side or the receiving side, and the pattern transmission interval is extended, for example, when the state in which the wireless line quality is good continues for a relatively long time. Be done.

[0034] In the above configuration, the transmitting side and the receiving side each have their own processing, but since the wireless communication device has both the transmitting unit and the receiving unit, the data communication direction is bidirectional. It is possible.

[0035] As described above, according to the first embodiment, since data is transmitted and received when the wireless line quality is good, unnecessary data transmission processing can be suppressed and communication quality with few data errors can be suppressed. There is an effect of obtaining a wireless communication device capable of realizing high-quality data communication. It is also possible to judge whether the communication line is good or bad based on the judgment pattern transmitted from the receiving side to the transmitting side, and send and receive data based on this judgment result, which simplifies the monitoring procedure. Therefore, there is an effect that a wireless communication device capable of increasing the processing capacity of user data can be obtained. Further, when the wireless line quality determination result returned from the receiving side becomes good, the data read from the transmission buffer unit 1 is restarted, the normal data transmission process is continuously performed until the next wireless line quality determination timing, and further wireless. When the line quality is good, the interval for determining the wireless line quality can be lengthened, which has the effect of obtaining a wireless communication device that can efficiently use the transmission buffer.

[0036] Embodiment 2. FIG. 4 is an explanatory diagram showing a processing operation related to a buffer memory in the wireless communication device of the second embodiment, and the configuration of the wireless communication device is the configuration of FIG. 1 of the first embodiment. It is the same as the wireless communication device shown in.

[0037] In this wireless communication device, the handling of data in the transmission buffer unit is changed depending on the difference in the service provided to the user data. For example, when congestion of the buffer memory 3a on the transmitting side is predicted and it is predicted that the bandwidth of the communication line will be exhausted, the transmitting side sends low-quality data input to the transmitting side to allow some deterioration. By thinning out before storing in the buffer memory 3a of, the memory area for discarding low quality data can be allocated to high quality data.

[0038] Further, it is conceivable that the best effort type data and the like are not stored in the buffer memory 3a on the transmitting side but are all discarded, and the memory area is allocated to the high quality data.

[0039] The process of thinning out low-quality data or discarding all data is not applied when the wireless line quality is good, and is applied for data buffering when the wireless line quality is not good. It may be used properly and switched depending on the wireless line quality.

[0040] As described above, according to the second embodiment, the service provided to the user data is provided according to the prediction result of the congestion state in the buffer memory 3a on the transmitting side and the quality of the communication line. By making it possible to control the handling of data in the transmission buffer section by the difference and thinning out low-quality data during buffering in the buffer memory 3a on the transmitting side, the memory area for discarding low-quality data can be allocated to high-quality data. , Best effort type data is not stored in the buffer memory 3a on the transmitting side, but is discarded, and a memory area is allocated to high quality data to obtain a wireless communication device that can efficiently use the transmission buffer. effective.

[Effect of the Invention] As described above, according to the present invention, the radio line quality determination pattern is transmitted from one station side to the other station side, and the other station side receives the radio line quality. The state of the wireless line is determined based on the determination pattern, the determination result is returned to the one station side, and the one station side is sent to the other station side according to the returned determination result. Since it is configured to be provided with a transmission control means for controlling data transmission, it is possible to decide whether or not to execute the data transmission process depending on whether the line condition is good or bad, and the data transmission process is performed when the line condition is bad. There is an effect that the communication quality can be improved by preventing the above.

[0042] According to the present invention, the state of the wireless line is determined based on the received wireless line quality determination pattern, and the determination result is returned to the side that sent the wireless line quality determination pattern, and the wireless line. Since the side that sent the quality judgment pattern is configured to control the input / output of data to the transmission buffer unit and control the transmission according to the returned judgment result, communication can be performed in a good line condition. It is possible to prevent communication in a bad state, suppress unnecessary data transmission processing, reduce data errors, and improve communication quality.

[0043] According to the present invention, only when it is determined that the state of the wireless line is good based on the determination result returned from the other station side.<u style="single">On the other hand</u>Since it is configured to transmit data to the station side, it has the effect of suppressing unnecessary data transmission processing, reducing data errors, and improving communication quality by communicating in good line conditions. ..

[0044] According to the present invention, one station side has a wireless line according to a determination result of the state of the wireless line returned from the other station side.<u style="single">quality</u>The transmission interval of the determination pattern is extended, and the wireless line is sent to the other station side.<u style="single">quality</u>Since it is configured to notify the information about the transmission interval of the determination pattern, when the state of the wireless line is good, the wireless line<u style="single">quality</u>This has the effect of extending the transmission interval of the judgment pattern and increasing the processing capacity of user data.

[0045] According to the present invention, depending on whether the data transmitted to the wireless line is data that allows deterioration or data that does not allow deterioration, the data that allows deterioration is thinned out, and the thinned out amount. Since the transmission buffer corresponding to the above is configured to be allocated to the data that does not tolerate the deterioration, there is an effect that the transmission buffer can be used efficiently.

[0046] According to the present invention, depending on whether the data transmitted to the wireless line is data that allows deterioration or data that does not allow deterioration, if the data allows deterioration, it is based on a predetermined condition. Since it is configured to be discarded and only data that does not tolerate deterioration is accumulated in the transmission buffer, for example, if the predetermined condition is set when congestion in the transmission buffer is expected, the congestion is expected. There is an effect that a flexible and efficient transmission buffer can be used according to the communication status and the service provided to the user, such as allocating the memory area for discarding low-quality data to high-quality data below.

[0047] According to the present invention, a wireless line quality determination pattern is transmitted from the other station on the receiving side to one station on the transmitting side, and based on the wireless line quality determination pattern received by the transmitting side. Since the transmitting side determines the state of the wireless line and controls the transmission of data from the transmitting side to the receiving side according to the determination result, the wireless line from the receiving side to the transmitting side. By transmitting the quality judgment pattern, the wireless line monitoring procedure can be simplified, the processing capacity of user data is enhanced, and it becomes possible to determine whether or not to execute the data transmission processing according to the good or bad line condition. There is an effect that the communication quality can be improved by preventing the data transmission process from being performed when the line condition is poor.

[0048] According to the present invention, a determination pattern addition unit for sending a wireless line quality determination pattern from a receiving side to a transmitting side, and the transmitting side receiving the wireless line quality determining pattern to determine the state of the wireless line. A transmission buffer control circuit that controls the input / output of data to the transmission buffer unit according to the determination unit and the determination result by the determination unit, and controls the transmission of data from the transmission side to the reception side on the transmission side. Since the receiver is configured to have the above, the wireless line quality determination pattern may be inserted into the transmission data by the determination pattern addition unit on the receiving side, and the wireless line quality determination pattern may be transmitted from the receiving side to the transmitting side. The procedure can be simplified, the processing capacity of user data is enhanced, it is possible to determine whether or not to execute the data transmission processing according to the good or bad line condition, and the data transmission processing is not performed when the line condition is bad. This has the effect of improving communication quality.

According to the present invention, only when the transmitting side determines that the state of the wireless line is good based on the wireless line quality determination pattern transmitted from the receiving side, the transmitting side sends data to the receiving side. Since it is configured to perform transmission, the wireless line monitoring procedure can be simplified, and unnecessary data transmission processing is suppressed by performing communication in a good line condition, data errors are reduced, and communication quality is improved. It has the effect of being able to plan.

[0050] According to the present invention, a wireless line from the transmitting side to the receiving side according to the state of the wireless line determined from the wireless line quality determination pattern sent from the receiving side.<u style="single">quality</u>Since the receiving side is configured to extend the transmission interval of the wireless line quality determination pattern by instructing the extension of the transmission interval of the determination pattern and the instruction regarding the extension of the transmission interval, the wireless line monitoring procedure is simplified. And when the condition of the wireless line is good, the wireless line<u style="single">quality</u>This has the effect of extending the transmission interval of the judgment pattern and increasing the processing capacity of user data.

[0051] According to the present invention, when it is determined that the state of the wireless line determined from the wireless line quality determination pattern sent from the receiving side is not good, deterioration of transmission from the transmitting side to the receiving side is allowed. Since the data is thinned out on the transmitting side and the transmission buffer corresponding to the thinned out is allocated to the data that does not allow deterioration, there is an effect that the transmission buffer can be used efficiently.

[0052] According to the present invention, when it is determined that the state of the wireless line determined from the wireless line quality determination pattern sent from the receiving side is not good, the data transmitted from the transmitting side to the receiving side is deteriorated. If the data is acceptable, it is discarded on the transmitting side based on a predetermined condition, and only the data that does not allow deterioration is stored in the transmission buffer. Therefore, for example, the predetermined condition is satisfied by the congestion in the transmission buffer. If set when expected, it is flexible and efficient according to the communication status and the service provided to the user, such as allocating the memory area for discarding low-quality data to high-quality data under the situation where congestion is expected. It has the effect of enabling the use of various transmission buffers.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a wireless communication device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a wireless communication device when the determination pattern according to the first embodiment of the present invention is transmitted from the receiving side.

FIG. 3 is a sequence diagram showing a communication processing operation between a transmitting side and a receiving side in the wireless communication device according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a processing operation related to a buffer memory in the wireless communication device according to the second embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a conventional wireless communication device.

FIG. 6 is a conceptual diagram of a control signal and a data signal communicated between a calling station and a called station in a conventional wireless communication device.

[Explanation of code] 1 Transmission buffer unit (buffering control means), 2 Reception buffer unit, 4 Transmission buffer control circuit (transmission control means, buffering control means), 6 Judgment pattern addition unit (transmission control means), 7 Judgment Unit (transmission control means), 8 Judgment result notification unit (transmission control means).