JP2011071781A - Management terminal, and communication-failure avoiding method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress drop in the processing capability of a management terminal (for example, a wireless access point (a wireless AP)) by accurately stopping error processing even if a PHY (a physical layer) error occurs in a burst manner during the execution of PHY error processing. <P>SOLUTION: The wireless AP includes a wireless transmitting/receiving part (a wireless device) 20, and a control part (a CPU) 50 or the like. When detecting transmission/reception of wireless communication with respect to a communication terminal 10 and a PHY error, the wireless device 20 generates an interrupt with respect to the CPU 50. When the interrupt is generated, the CPU 50 executes transmission/reception processing with respect to the transmission/reception and PHY error processing for correcting a radio-wave state. On that occasion, the CPU 50 detects whether the occurrence frequency of the PHY error exceeds a burst threshold during the interrupt processing. When the occurrence frequency of the PHY error exceeds the burst threshold, the CPU stops the PHY error processing and executes masking of the PHY error. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention utilizes the number of occurrences of a physical layer (Physical Layer, hereinafter referred to as “PHY”) error, which is one of the causes of a problem of data demodulation from a wireless carrier wave (hereinafter referred to as “NG”). A management terminal (for example, a wireless access point, hereinafter referred to as “wireless AP”) that corrects radio wave conditions, and a wireless failure avoidance method for eliminating NG that occurs when a PHY error occurs in a burst manner in the wireless AP It is about.

FIG. 2 is a configuration diagram illustrating an outline of a conventional management terminal (for example, a wireless AP).
The wireless AP transmits a beacon to a plurality of communication terminals (not shown) so that the communication terminal can receive the beacon and detect a network by available wireless communication. .

  The wireless AP includes an antenna 1 for wireless transmission / reception, and a wireless transmission / reception unit (for example, a wireless device for wireless transmission / reception processing having a wireless function) 2 is connected to the antenna 1. The wireless device 2 is a device that generates an interrupt when transmission / reception of wireless communication with a communication terminal (not shown) and a PHY error are detected. The wireless device 2 includes a clock generation unit 3, a storage unit (for example, a readable / writable memory, hereinafter referred to as “RAM”) 4, and a control unit (for example, a central processing unit, which is described below) that controls the entire wireless AP. "CPU") 5 etc. are connected.

  The clock generation unit 3 is a circuit that supplies a clock signal to each functional block at regular intervals. The RAM 4 stores a plurality of data groups written from the wireless device 2. Each data group is fixed-size data including reception data and status data, and is written from the wireless device 2 to the storage area of the RAM 4 when reception of wireless data, a state change of the wireless device 2, or the like occurs. Further, the CPU 5 reads data and various information in the data group stored in the RAM 4 at a constant cycle based on the clock signal supplied from the clock generation unit 3 at a constant cycle, and performs processing according to the contents (for example, , A circuit that performs various controls on the wireless device 2 depending on the number of occurrences of PHY errors.

  The wireless AP generates an interrupt to the CPU 5 when the wireless device 2 detects a PHY error that is one of the causes of NG when demodulating data from a wireless carrier wave. When the CPU 5 receives an interrupt, it performs PHY error processing and corrects the radio wave condition according to the frequency of occurrence of PHY errors. However, if the PHY error frequently occurs, the wireless AP processes only the PHY error processing including this correction processing, so that the capability of the entire wireless AP is reduced and the wireless function may not operate normally.

  Therefore, as a countermeasure, conventionally, when the frequency of occurrence of PHY errors is high enough to affect the wireless AP, the PHY error processing is stopped (that is, the function of writing to the RAM 4 when the PHY error is detected by the wireless device 2 is stopped). However, a method has been proposed in which the wireless AP does not lose its processing capacity due to a large amount of PHY error analysis.

  In the control of execution / stop of PHY error processing, there is a method of comparing the number of PHY errors occurring within a certain time with a threshold determined by the wireless AP and switching to either processing.

  FIG. 3 is a flowchart showing a processing example for determining whether or not PHY error processing can be performed in the wireless AP shown in FIG. 2, that is, a control example for executing / stopping PHY error processing.

  Further, FIG. 4 is a diagram of the number of PHY errors showing an example of the implementation of PHY error masking / unmasking of FIG. In FIG. 4, the horizontal axis represents time, and the vertical axis represents the number of PHY errors during a certain time.

  In step S1 of FIG. 3, when the CPU 5 in the wireless AP starts periodic processing every predetermined time (for example, 10 ms), in step S2, other processing such as transmission / reception processing is performed. In step S3, the CPU 5 determines whether or not the number of times measurement time (for example, 100 ms) has elapsed. If it has elapsed (Y), the process proceeds to step S4, and if it has not elapsed (N), step S8. Proceed to

  In step S4, the CPU 5 reads the number of PHY error data groups written in the RAM 4 by the wireless device 2 at the measurement interval T shown in FIG. 4, and whether the number of PHY errors is less than the low level threshold TH1 shown in FIG. If not (Y), it is determined that the wireless environment is good and the process proceeds to step S5. If it is large (N), it is determined that the wireless environment is not good and the process proceeds to step S6.

  In step S5, since the wireless environment is good, the CPU 5 performs PHY error processing and proceeds to step S8. On the other hand, in step S6, the CPU 5 determines whether or not the number of PHY errors is equal to or higher than the high level threshold THh shown in FIG. 4, and if it is equal to or higher than the high level threshold THh (Y), it is determined that the wireless environment is bad. The process proceeds to step S7, and if it is less than the high level threshold THh (N), the process proceeds to step S8.

  In step S7, the CPU 5 stops the PHY error processing so that the processing capability of the wireless AP does not drop, and the data group written to the RAM 4 by the wireless device 2 in the period H shown in FIG. 4 is a PHY error data group. Since it is necessary to prevent the received data from being filled due to being filled, a PHY error mask is implemented to prohibit writing of the PHY error data group, and the process proceeds to step S8.

  In step S8, the CPU 5 erases (clears) the PHY error count that is statistical information, and proceeds to step S9. In step S9, the CPU 5 performs other processing such as transmission / reception processing, and ends the periodic processing in step S10.

  Patent Document 1 below describes a technique for determining a communication environment based on communication error information corresponding to a PHY error and suppressing the configuration of the management terminal from being complicated.

JP 2007-116583 A

However, the conventional wireless AP has the following problems.
FIG. 5 is a diagram of the number of PHY errors when a PHY error occurs in a burst manner in the PHY error mask / unmasking embodiment of FIG. In FIG. 5, the horizontal axis represents time, and the vertical axis represents the number of PHY errors during a certain time.

  The PHY error processing feasibility determination flow in FIG. 3 in the conventional wireless AP is a method for avoiding communication failure due to PHY errors assuming that PHY errors occur linearly. As shown in FIG. PHY error masking is performed in the periods H1 and H2 that occur automatically, but cannot cope with PHY errors E1 and E2 that occur in bursts within the measurement interval T. For this reason, even if PHY errors E1 and E2 occur in bursts during PHY error processing, the error processing cannot be stopped, the wireless AP processing capability is reduced, or the received data written to the RAM 4 by the wireless device 2 Before the CPU 5 processes the wireless device 2, a large amount of data including PHY error status data is overwritten, and the received data may not be processed, which may hinder the wireless function.

  When the management terminal of the present invention wirelessly communicates with a communication terminal and detects transmission / reception of the wireless communication and a PHY error with respect to the communication terminal, a wireless transmission / reception unit that generates an interrupt, and when an interruption occurs from the wireless transmission / reception unit, A management terminal having a management terminal main body that performs an interrupt process for a radio transmission / reception unit, and performs a transmission / reception process for the transmission / reception and a PHY error process for correcting a radio wave condition according to a frequency of occurrence of the PHY error.

  Here, the management terminal main body detects whether or not the occurrence frequency of the PHY error is equal to or higher than a burst threshold during the interrupt processing, and when the occurrence frequency of the PHY error is equal to or higher than the burst threshold, the PHY error Is a burst error, stops the PHY error processing, and further masks the PHY error to prohibit the interruption due to the PHY error.

  According to the management terminal communication failure avoidance method of the present invention, when wireless communication is performed with a communication terminal and transmission / reception of the wireless communication with respect to the communication terminal and a PHY error are detected, a wireless transmission / reception unit that generates an interrupt, and an interruption from the wireless transmission / reception unit A management terminal main body that performs an interrupt process for the radio transmission / reception unit and executes a transmission / reception process for the transmission / reception and a PHY error process for correcting a radio wave condition according to the frequency of occurrence of the PHY error. In the management terminal, the management terminal main body performs the following processing during the interrupt processing.

  That is, the management terminal main body detects whether or not the frequency of occurrence of the PHY error is equal to or higher than a burst threshold during the interrupt processing, and when the frequency of occurrence of the PHY error is equal to or higher than the threshold for burst, the PHY error is detected. It is determined that the error has occurred in a burst manner, the PHY error processing is stopped, and further, the PHY error is masked to prohibit interruption due to the PHY error.

  According to the management terminal and the communication failure avoidance method of the present invention, even if a PHY error occurs in a burst manner during the execution of a PHY error process, the error process can be stopped accurately. As a result, it is possible to improve the reliability of the wireless function by suppressing a decrease in the processing capability of the management terminal.

FIG. 1 is a configuration diagram showing an outline of a management terminal (for example, a wireless AP) in Embodiment 1 of the present invention. FIG. 2 is a configuration diagram showing an outline of a conventional management terminal (for example, a wireless AP). FIG. 3 is a flowchart showing an example of processing for determining whether or not to perform PHY error processing in the wireless AP of FIG. FIG. 4 is a diagram of the number of PHY errors, showing an example of the implementation of the PHY error mask / mask removal of FIG. FIG. 5 is a diagram showing the number of PHY errors when a PHY error occurs in a burst manner in the PHY error mask / unmasking embodiment of FIG. FIG. 6 is a flowchart showing interrupt processing for the wireless device 20 of FIG. FIG. 7 is a time chart showing the interrupt processing procedure of FIG. FIG. 8 is a diagram of the number of PHY errors showing an example of the implementation of PHY error masking / unmasking in FIG. 1, that is, an example of implementation / stopping of PHY error processing by threshold. FIG. 9 is a flowchart showing an example of processing for determining whether or not to perform PHY error processing in the wireless AP of FIG. FIG. 10 is a time chart showing the processing procedure of FIG.

  Modes for carrying out the present invention will become apparent from the following description of the preferred embodiments when read in light of the accompanying drawings. However, the drawings are only for explanation and do not limit the scope of the present invention.

(Configuration of Example 1)
FIG. 1 is a configuration diagram illustrating an outline of a management terminal (for example, a wireless AP) according to the first embodiment of the present invention.

  The wireless AP according to the first embodiment transmits beacons to a plurality of communication terminals 10 (= 10-1, 10-2,...) As in the prior art, and each communication terminal 10 transmits its beacon. Can be detected and a network by available wireless communication can be detected.

  The wireless AP has an antenna 11 for wireless transmission / reception, and a wireless transmission / reception unit (for example, a wireless device having a wireless function) 20 is connected to the antenna 11. The wireless device 20 is a device that generates an interrupt when transmission / reception of wireless communication to the communication terminal 10 and a PHY error are detected. The wireless device 20 is connected to a clock generation unit 30, a storage unit (for example, RAM) 40, and a control unit (for example, CPU) 50 for controlling the entire wireless AP via the bus 25. Yes. Here, the clock generation unit 30, the storage unit (for example, RAM) 40, and the control unit (for example, CPU) 50 constitute a management terminal main body.

  The wireless device 20 includes, for example, a transmission / reception unit 21 that performs transmission / reception of wireless communication, an error detection unit 22 that detects an error such as a PHY error, and an interrupt status register (hereinafter referred to as “ISR”) 23 a that holds an interrupt state. And various registers 23 and the like. The wireless device 20 has a function of notifying the CPU 50 using an interrupt when an event relating to reception and transmission of wireless data or an event such as an error occurs. On the CPU 50 side, when an interrupt is detected or when a data group is periodically viewed, the various registers 23 in the wireless device 20 are read and written as necessary.

  The clock generation unit 30 is a circuit that supplies a clock signal to each functional block at regular intervals, and includes an oscillator or the like.

  The RAM 40 has a certain storage area 41 for storing data from the wireless device 20, and a plurality of data groups 42 from the wireless device 20 are written into the storage area 41. Each group of data 42 is fixed-size data including reception data 42a and status data 42b. When reception of wireless data by the wireless device 20, a change in the state of the wireless device 20, or the like occurs, the wireless device 20 receives data from the wireless device 20. It is written in the storage area 41 of the RAM 40.

  For example, in the storage area 41 of the RAM 40, the wireless device 20 writes the data group 42, and the data group 42 is read by the CPU 50. When the maximum value in the storage area 41 is written, the next write is performed from the initial position and overwritten.

  In accordance with a communication program stored in a program memory (not shown), the CPU 50 performs data and various data stored in the data group 42 stored in the RAM 40 at regular intervals based on clock signals supplied from the clock generation unit 30 at regular intervals. This is a circuit that reads information and performs processing according to the content (for example, various controls on the wireless device 20 depending on the number of occurrences of PHY errors).

  The CPU 50 includes, for example, a register access unit 51 that reads from and writes to the ISR 23a, an interrupt factor determination unit 52 that determines an interrupt factor from the wireless device 20, and a transmission / reception processing unit that performs transmission / reception processing for transmission / reception (for example, A beacon transmission processing unit 53 that performs processing such as generation of a beacon for transmission from the transmission / reception unit 21 in the wireless device 20, a reception interrupt processing unit 54 that performs reception interruption processing from the transmission / reception unit 21 in the wireless device 20, and The radio wave condition is corrected based on the transmission completion interrupt processing unit 55) that processes the transmission completion notification interrupt from the transmission / reception unit 21 in the wireless device 20 and the frequency of occurrence of PHY errors (for example, the number of PHY errors during a certain period). Error processing unit for performing PHY error processing (for example, Error factor determination means 56 for determining the error factor detected by the error detection means 22 in the wireless device 20, and PHY error processing means 57 for correcting the PHY error detected by the error detection means 22 in the wireless device 20) And various other functions such as other error processing means 58 for performing correction processing for errors other than PHY errors.

  Here, the error factor determination means 56 determines whether or not the number of PHY errors is equal to or greater than the burst threshold THb. If the number of PHY errors is equal to or greater than the burst threshold THb, the PHY error is an error that has occurred in a burst manner. As a determination means for outputting a first determination result and outputting a second determination result indicating that the PHY error is a linearly generated error when the number of PHY errors is lower (that is, smaller) than the burst threshold THb. It has the function of

  When the first determination result is input, the PHY error processing means 57 stops the PHY error processing, and further masks the PHY error and prohibits writing to the RAM 40 and interruption to the CPU 50 due to the occurrence of the PHY error. When the first determination function and the second determination result are input, a predetermined threshold band lower than the burst threshold THb (for example, between the low level threshold THl and the high level threshold THh in FIGS. 4 and 5) PHY error processing is performed when the number of PHY errors is small, and when the number of PHY errors is equal to or greater than the threshold band, the PHY error processing is performed. And a function as a second control means for stopping the operation.

(Interrupt processing for wireless devices)
FIG. 6 is a flowchart showing an interrupt process for the wireless device 20 of FIG. 1, that is, a software process of the CPU 50 for an interrupt from the wireless device 20. FIG. 7 is a time chart showing the interrupt processing procedure of FIG.

  Further, FIG. 8 is a diagram of the number of PHY errors showing an example of the implementation of PHY error masking / unmasking of FIG. 1, that is, an example of implementation / stopping of PHY error processing by a threshold, and corresponds to FIG. . In FIG. 8, the horizontal axis represents time, and the vertical axis represents the number of PHY errors during a certain time. In addition to the conventional low level threshold TH1 and high level threshold THh shown in FIG. 5, a burst threshold THb is added. With respect to the measurement interval T, PHY error masking is performed in the periods H11, H12, and H13. In contrast to the conventional FIG. 5, when the PHY errors E1 and E2 are generated in bursts in the periods H11 and H12. Also shown is the masking.

  In the interrupt processing of the CPU 50 from the wireless device 20 according to the first embodiment, the error factor determination unit 56 in the CPU 50 checks the cause of occurrence of the PHY error, and a conventional PHY error occurs linearly. The processing is performed separately from the case where the PHY error occurs in a burst manner. Therefore, for a PHY error that occurs in a burst, which is a problem, when the error detection means 22 in the wireless device 20 detects a PHY error, it has a function of generating an interrupt, and the wireless device 20 in FIGS. The process of step S15 is added to the interrupt process.

Hereinafter, the interrupt processing according to the first embodiment will be described with reference to FIGS. 6 and 7.
In step S11 of the flowchart of FIG. 6, when the CPU 50 starts interrupt processing for the wireless device 20, the register access means 51 in the CPU 50 reads the ISR 23a in the wireless device 20 in step S12.

  As shown in FIG. 7, the CPU 50 checks the interrupt factor and performs various processes (steps S13, S14, S16 to S19 in FIG. 6). First, in step S13 in FIG. The means 51 checks the interrupt factor. As a result of the check, if the interrupt is due to error detection by the error detection means 22 in the wireless device 20, the process proceeds to step S14. If the beacon transmission request is interrupted by the transmission / reception means 21, the process proceeds to step S17. In the case of the interruption, the process proceeds to step S18. In the case of the interruption of the wireless packet transmission by the transmission / reception means 21, the process proceeds to step S19.

  In step S14, the error factor determination unit 56 in the CPU 50 checks whether the error factor detected by the error detection unit 22 in the wireless device 20 is a PHY error or another error, and if the check result is a PHY error. The process proceeds to the added step S15, and in the case of other errors, the process proceeds to step S16.

  In step S15a in step S15, the PHY error processing means 57 in the CPU 50 counts the number of occurrences of the PHY error written in the ISR 23a. In step S15b, the PHY error processing means 57 determines whether or not the number of occurrences of PHY errors is greater than or equal to the burst threshold THb in FIG. 8, and if the number of occurrences of PHY errors is greater than or equal to the burst threshold THb (Y), Proceeding to step S15c, if the number of occurrences of the PHY error is smaller than the burst threshold THb (N), the process proceeds to step S20.

  In step S15c, the PHY error processing unit 57 stops the PHY error processing for correcting the PHY error and prohibits the wireless device 20 from writing the PHY error to the RAM 40. Further, in step S15d, the PHY error processing means 57 masks the PHY errors E1 and E2 as shown by circles in the periods H11 and H12 in FIG. The interruption of the PHY error is prohibited, and the process proceeds to step S20. In step S20, the register access means 51 in the CPU 50 clears the PHY error information of the corresponding bit written in the ISR 23a, and then ends the wireless device interrupt process in step S21.

  If the check result in step S14 is another error, in step S16, the other error processing means 58 in the CPU 50 performs correction processing for errors other than the PHY error, and proceeds to step S20. To finish the process.

  On the other hand, when the check result in step S13 is a beacon transmission request, in step S17, the beacon transmission processing unit 53 in the CPU 50 activates the beacon transmission process to generate a beacon, and the transmission / reception unit 21 in the wireless device 20 is activated. Via the antenna 11. Then, it progresses to step S20 and complete | finishes a process in step S21.

  If the check result in step S13 is reception of a wireless packet, in step S18, the reception interrupt processing means 54 in the CPU 50 receives demodulation, etc. for the wireless packet received from the communication terminal 10 received by the transmission / reception means 21 in the wireless device 20. Process. Then, it progresses to step S20 and complete | finishes a process in step S21.

  If the check result in step S13 indicates that the wireless packet transmission is complete, the transmission completion interrupt processing means 55 in the CPU 50 reports the transmission completion of the wireless packet transmitted from the transmission / reception means 21 in the wireless device 20 in step S19. In response, the next wireless packet is transmitted. Then, it progresses to step S20 and complete | finishes a process in step S21.

(Determining whether PHY error processing can be performed)
FIG. 9 is a flowchart showing an example of processing for determining whether or not to execute PHY error processing in the wireless AP of FIG. 1, that is, a control example of execution / stop of PHY error processing, and corresponds to FIG. Further, FIG. 10 is a time chart showing the processing procedure of FIG.

  In the process of determining whether or not the PHY error process can be performed in the wireless AP of FIG. 9 according to the first embodiment, step S34 for performing processing such as clearing the number of PHY error occurrences used in the interrupt process is added to the process of FIG. The other processes are the same as in the prior art.

  Hereinafter, a processing example of whether or not PHY error processing can be performed in the wireless AP according to the first embodiment will be described with reference to FIGS. 9 and 10.

  In step S31 of FIG. 9, the CPU 50 in the wireless AP starts periodic processing every predetermined time (for example, 10 ms) based on the clock signal output from the clock generation unit 30. In step S32, the CPU 50 performs transmission / reception processing and the like. Perform other processing. In step S33, the CPU 50 determines whether or not the number measurement time (for example, 100 ms) has elapsed. If it has elapsed (Y), the process proceeds to step S34, and if not (N), step S39. Proceed to

  In step S34a in step S34, the register access means 51 in the CPU 50 clears the number of PHY error occurrences used in the interrupt processing written in the ISR 23a. In step S34b, the register access unit 51 enables the interruption due to the PHY error from the wireless device 20, and proceeds to step S35.

  Thereafter, in the same manner as in FIG. 3 in the related art, in step S35, the CPU 50 reads the number of PHY error data groups 42 written in the RAM 40 by the wireless device 20 at the measurement interval T shown in FIG. It is determined whether or not the threshold value is lower than the low level threshold TH1 shown in FIG. 8, and if it is less (Y), the wireless environment is determined to be good and the process proceeds to step S36. It is determined that there is not, and the process proceeds to step S37.

  In step 36, since the wireless environment is good, the CPU 50 performs PHY error processing and proceeds to step S39. On the other hand, in step S37, the CPU 50 determines whether or not the number of PHY errors is equal to or higher than the high level threshold THh shown in FIG. 8, and if it is equal to or higher than the high level threshold THh (Y), determines that the wireless environment is bad. The process proceeds to step S38, and if it is less than the high level threshold THh (N), the process proceeds to step S39.

  In step S38, the CPU 50 stops PHY error processing so that the processing capability of the wireless AP does not decrease, and prohibits writing of the PHY error data group 42 to the RAM 40 in the periods H11, H12, and H13 shown in FIG. Therefore, PHY error masking is performed, and the process proceeds to step S39.

  In step S39, the CPU 50 deletes (clears) the PHY error count that is statistical information, and proceeds to step SS40. In step S40, the CPU 50 performs other processing such as transmission / reception processing, and ends the periodic processing in step S41.

(Effect of Example 1)
According to the communication failure avoidance method due to the PHY error of the first embodiment, the process of step S15 shown in FIG. 6 is added, so that, as shown in FIG. The number of occurrences can be counted each time a PHY error occurs. Thereby, the following processes (1) to (5) can be realized.

  (1) At the time of executing the processing of FIG. 9 as in the prior art, the count value of the number of PHY error occurrences can be cleared in step S34a.

  (2) The count value of the number of PHY error occurrences can be updated each time a PHY error is detected by the processing in steps S15 and S20 in FIG.

  (3) When the updated counter value of the number of occurrences of the PHY error is equal to or greater than the burst threshold THb for determining that the PHY error has occurred in a burst manner, the PHY error processing is performed. You can stop. The burst threshold THb at this time may be appropriately determined according to the wireless AP system.

  (4) In the processing after (3), since the interruption of the PHY error becomes unnecessary, the interruption due to the PHY error is masked so as not to occur.

  (5) At the time of executing the processing of FIG. 9 as in the prior art, in step S34, the count value of the number of occurrences of the PHY error is cleared, and further, the interruption due to the PHY error becomes valid. In the subsequent processing, as in the prior art, the process proceeds to either execution / stop of the PHY error processing.

  Therefore, according to the first embodiment, as shown in FIG. 8, when bursty PHY errors E1 and E2 occur as in the case of the conventional PHY error, the PHYs are also shown in circles in the periods H11, H12, and H13. Since the error masking is performed, it is possible to accurately solve problems that occur in the conventional method, such as data loss due to overwriting of received data due to a large amount of data including PHY error information from the wireless device.

(Modification)
The present invention is not limited to the first embodiment, and various usage forms and modifications are possible. For example, the following forms (a) and (b) are used as the usage form and the modified examples.

  (A) The wireless device 20, the clock generation unit 30, the RAM 40, and the CPU 50 are not limited to the configuration in FIG. 1, and can be changed to functions and configurations other than those illustrated by changing the functions and the like. In particular, the control unit is configured by the CPU 50. However, by changing this communication program, it is possible to change to means 51 to 58 other than those shown in the figure, or the control unit may be configured by an individual circuit.

  (B) In Example 1, although the example applied to wireless AP as a management terminal was demonstrated, this invention is applicable also to the reception process in the communication terminal 10, etc.

10, 10-1, 10-2 Communication terminal 20 Wireless device 22 Error detection means 23a Interrupt status register (ISR)
30 clock generator 40 RAM
50 CPU

Claims (7)

Wirelessly communicating with a communication terminal,
A wireless transmission / reception unit that generates an interrupt upon detection of transmission / reception of the wireless communication to the communication terminal and a physical layer error;
When an interruption occurs from the wireless transmission / reception unit, the interruption processing for the wireless transmission / reception unit is performed, and the transmission / reception processing for the transmission / reception and the physical layer error processing for correcting the radio wave condition according to the occurrence frequency of the physical layer error are executed. A management terminal main body,
A management terminal having
The management terminal body is
During the interrupt processing, it is detected whether the occurrence frequency of the physical layer error is equal to or higher than a threshold for burst. When the occurrence frequency of the physical layer error is equal to or higher than the threshold for burst, the physical layer error has occurred in a burst manner. A management terminal comprising: a control unit that determines an error, stops the physical layer error processing, and further masks the physical layer error to prohibit interruption due to the physical layer error. Wirelessly communicating with a communication terminal,
A wireless transmission / reception unit that generates an interrupt upon detection of transmission / reception of the wireless communication to the communication terminal and a physical layer error;
When an interruption occurs from the wireless transmission / reception unit, the interruption processing for the wireless transmission / reception unit is performed, and the transmission / reception processing for the transmission / reception and the physical layer error processing for correcting the radio wave condition according to the occurrence frequency of the physical layer error are executed. A management terminal main body,
A management terminal having
The management terminal body is
During the interrupt processing, it is detected whether the frequency of occurrence of the physical layer error is equal to or greater than a threshold for burst, and a detection result is obtained. When the detection result is equal to or greater than the threshold for burst, the physical layer error occurs in bursts The physical layer error processing is stopped, the physical layer error is masked to prohibit interruption due to the physical layer error, and the detection result is lower than the burst threshold value. The physical layer error is determined to be a linearly generated error, and when the occurrence frequency is low for a predetermined threshold band lower than the burst threshold, the physical layer error processing is performed. A management terminal comprising a control unit that stops the physical layer error processing when the occurrence frequency is high. Wirelessly communicating with a communication terminal,
When performing transmission / reception of the wireless communication to the communication terminal and detection of a physical layer error, a wireless transmission / reception unit that generates an interruption of the detection information;
When the interruption occurs from the wireless transmission / reception unit, a storage unit in which the detection information is written,
The detection information written in the storage unit is read, and based on the detection information, a transmission / reception processing unit that performs transmission / reception processing for the transmission / reception, and a physical layer error for correcting radio wave conditions based on the occurrence frequency of the physical layer error A control unit having an error processing unit for performing processing;
A management terminal equipped with
The error processing unit in the control unit is:
It is determined whether the occurrence frequency of the physical layer error is equal to or higher than a threshold for burst, and when the occurrence frequency of the physical layer error is equal to or higher than the threshold for burst, the physical layer error is an error generated in a burst manner. A determination unit that outputs a determination result of 1 and outputs a second determination result that the physical layer error is a linearly generated error when the occurrence frequency of the physical layer error is lower than the burst threshold; ,
When the first determination result is inputted, the physical layer error processing is stopped, and further, the detection due to the physical layer error is masked, and the interrupt due to the physical layer error is written to the storage unit. A first control means to prohibit;
When the second determination result is input, it is determined whether the occurrence frequency of the physical layer error is low with respect to a predetermined threshold band lower than the burst threshold, and when the occurrence frequency is low, the physical layer Second control means for performing error processing and stopping the physical layer error processing when the occurrence frequency is equal to or higher than the threshold band;
A management terminal comprising:   The management terminal according to claim 1, wherein the management terminal is a wireless access point. Wireless communication with communication terminals,
A wireless transmission / reception unit that generates an interrupt upon detection of transmission / reception of the wireless communication to the communication terminal and a physical layer error;
When an interruption occurs from the wireless transmission / reception unit, the interruption processing for the wireless transmission / reception unit is performed, and the transmission / reception processing for the transmission / reception and the physical layer error processing for correcting the radio wave condition according to the occurrence frequency of the physical layer error are executed. A management terminal main body,
In a management terminal having
The management terminal body, during the interrupt processing,
Detecting whether the frequency of occurrence of the physical layer error is equal to or greater than a threshold for bursting;
When the occurrence frequency of the physical layer error is equal to or higher than the burst threshold, it is determined that the physical layer error is an error that has occurred in a burst manner, the physical layer error processing is stopped, and the physical layer error mask is further stopped. A communication failure avoidance method for the management terminal, wherein the interruption due to the physical layer error is prohibited. Wirelessly communicating with a communication terminal,
A wireless transmission / reception unit that generates an interrupt upon detection of transmission / reception of the wireless communication to the communication terminal and a physical layer error;
When an interruption occurs from the wireless transmission / reception unit, the interruption processing for the wireless transmission / reception unit is performed, and the transmission / reception processing for the transmission / reception and the physical layer error processing for correcting the radio wave condition according to the occurrence frequency of the physical layer error are executed. A management terminal main body,
In a management terminal having
The management terminal body, during the interrupt processing,
Detecting whether the occurrence frequency of the physical layer error is equal to or higher than a threshold for burst and obtaining a detection result,
When the detection result is equal to or greater than the burst threshold, it is determined that the physical layer error is a burst-generated error, the physical layer error processing is stopped, and further, the physical layer error masking is performed. Disable interrupts due to physical layer errors,
When the detection result is lower than the burst threshold, it is determined that the physical layer error is a linearly generated error, and the occurrence frequency is determined for a predetermined threshold band lower than the burst threshold. The management terminal communication failure avoiding method, wherein the physical layer error processing is performed when the frequency is low, and the physical layer error processing is stopped when the occurrence frequency is high.   7. The management terminal communication failure avoidance method according to claim 5, wherein the management terminal is a wireless access point.

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