JP2006345274A - Interference evasion method of bluetooth (r) terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of concentration of re-mapping at a non-interference frequency band because of the similar operation of each network along the AFH if an extraneous interference is detected in duplicated areas, and a problem of further interference at the avoided point in spite of avoiding the interference in a conventional technology of AFH, which has no effect on the interference of mutual AFH operating devices even though the technology has an effective function for reducing interference with another device, which uses 2.4 GHz. <P>SOLUTION: Utility band information is acquired based on utilization enable band information, which was acquired based on a detection result of the interference band. A hopping pattern is generated based on the utility band information, and thereby interference in a frequency band of the point can be reduced where the extraneous interference wave has been avoided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication device. More specifically, the present invention relates to a communication device that performs wireless communication using Bluetooth (registered trademark).

  Currently, a wireless communication system using Bluetooth (registered trademark) is used. Bluetooth (registered trademark) is widely spread as a short-range wireless communication standard, and is being rapidly spread by being mounted on a mobile phone, a notebook PC (Personal Computer), a PDA (Personal Digital Assistance), and the like. Since the 2.4 GHz band used by Bluetooth (registered trademark) communication can be operated without a license, in addition to Bluetooth (registered trademark) communication, a wireless LAN (Local Area Network), digital cordless, or the like can be used. Various wireless communication methods such as telephone are mixed. For this reason, when using each radio | wireless communication system simultaneously, it may interfere with each other and may cause the fall of a communication speed, or a cutting | disconnection.

  Bluetooth (registered trademark) adopts AFH (Adaptive Frequency Hopping) in the standard Ver1.2 as a technique for avoiding such interference with other devices. AFH is a technique for avoiding radio wave interference with devices using the same 2.4 GHz. By using this AFH, it is possible to avoid interference with other devices using a wireless LAN or the like.

On the other hand, in Patent Document 1, as a technique for avoiding interference, when there is a wireless communication apparatus capable of performing different wireless communication in overlapping frequency ranges, one wireless communication is in a low power consumption mode state and control data An invention of a wireless communication device that controls to perform communication of user data using a gap of a predetermined interval of control data so as not to interfere with user data of the other wireless communication when only transmitting is transmitted ing.
JP 2005-45368 A

  However, the invention described in Patent Document 1 is an invention that avoids interference when the other is in the standby mode, and there is a problem that interference cannot be avoided when both of the overlapping wireless communications are active. is there.

  In addition, the AFH of the prior art reduces the interference by detecting the external frequency from other devices and switching the frequency called hopping without using the frequency band. This is an effective function for reducing interference with other 2.4 GHz devices, but has no effect on interference between Bluetooth (registered trademark) devices or between AFH operating devices. That is, when an external interference wave is detected in an area where a plurality of Bluetooth (registered trademark) communication networks overlap, each network performs the same processing according to the AFH in order to avoid interference. There is a problem that, even though access is concentrated in a frequency band that is not received and interference is avoided, further interference is caused at the avoidance point.

  Therefore, the present invention has been made in view of the above problems, and reduces the interference generated in the frequency band ahead of the interference and enables stable Bluetooth (registered trademark) communication. An object is to provide an apparatus.

  Therefore, in the present invention, in order to solve such a problem, an interference band detection unit for detecting an interference band, and an available band information acquisition unit that acquires usable band information based on the detection result of the interference band A used band information acquiring unit that acquires used band information based on the available band information, a hopping pattern generating unit that generates a hopping pattern based on the used band information, and a hopping pattern generated by the hopping pattern generating unit And a communication unit for performing communication according to the above. Further, the hopping pattern generation unit generates a primary hopping pattern based on the available bandwidth information, and remaps the primary hopping pattern based on the used bandwidth information to perform secondary hopping. You may have the secondary generation means which produces | generates a pattern, and the hopping pattern output means which outputs a secondary hopping pattern as a hopping pattern which should be utilized in a communication part. In addition, the used band information acquisition unit includes a used band setting information acquiring unit that acquires used band setting information that is input information for determining a used band, and a used band determining unit that determines a used band based on the used band setting information. And use band information generating means for generating use band information based on information indicating the determined use band. In addition, it further includes a use band information storage unit capable of storing a plurality of use band information, and the use band information acquisition unit may include storage use band information acquisition means for acquiring use band information from the use band information storage unit. Good. The used band information accumulating unit has a prioritized holding unit that holds the accumulated used band information in association with the priority order, and the accumulated used band information acquiring unit acquires the accumulated used band information. In this case, a priority acquisition unit that acquires the used bandwidth information according to the priority order may be provided.

  The communication device according to the present invention acquires usable bandwidth information based on the detection result of the interference band, and further generates a hopping pattern based on the used bandwidth information acquired based on the usable bandwidth information to perform communication. Therefore, it is possible to avoid the influence of the external interference wave, and to reduce the interference in the frequency band ahead of the interference, thereby enabling stable Bluetooth (registered trademark) communication. Can be realized.

  Hereinafter, embodiments of each invention will be described. Note that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the spirit of the present invention. In addition, the relationship between the following embodiment and a claim is as follows. The first embodiment will mainly describe claims 1 and 6. In the second embodiment, claims 2 and 7 will be mainly described. In the third embodiment, claims 3 and 8 will be mainly described. In the fourth embodiment, claims 4 and 9 will be mainly described. In the fifth embodiment, claims 5 and 10 will be mainly described.

<< Embodiment 1 >>
<Outline of Embodiment 1>
The communication device in the present embodiment acquires usable bandwidth information based on the detection result of the interference band, and further uses the hopping pattern generated by acquiring the used bandwidth information based on the usable bandwidth information. It is possible to avoid interference in the frequency band ahead of avoiding external interference waves. FIG. 1 is a diagram showing a concept of an embodiment in the present embodiment. As shown in FIG. 1, Bluetooth (registered trademark) communication realizes communication with each other by constructing a network called a piconet, which is composed of a master device called a master and a slave device called a slave. As shown in FIG. 1, the present embodiment is a description of processing when an external interference wave from another device using 2.4 GHz is detected in a state where a plurality of piconets overlap.

<Configuration of Embodiment 1>
FIG. 2 is a functional block diagram illustrating an example of the configuration of the communication apparatus according to the present embodiment. As shown in FIG. 2, the “communication device” (0200) of the present embodiment includes an “interference band detection unit” (0201), an “available band information acquisition unit” (0202), and a “used band information acquisition unit”. ”(0203),“ hopping pattern generation unit ”(0204), and“ communication unit ”(0205).

  Each unit, which is a component of the present invention, is configured by either hardware, software, or both hardware and software. For example, as an example for realizing these, when a computer is used, hardware composed of a CPU, a memory, a bus, an interface, a peripheral device, and the like, and software executable on these hardware are listed. be able to. Specifically, the functions of each part are realized by processing, storing, and outputting data on the memory and data input via the interface by sequentially executing the program expanded on the memory (this book) The same applies throughout the specification).

  The “interference band detector” (0201) is for detecting an interference band. The “interference band” is a band where the frequency being used overlaps with the frequency of another device. When interference occurs, the communication speed decreases or the communication is disconnected in some cases, so that processing for avoiding interference as described later is required. As an example of a method for detecting an interference band, a frequency band in which interference occurs is detected with reference to the signal strength of a radio wave received by an after-mentioned communication unit (0205), an error rate of demodulated data, or the like. A method is mentioned.

  The “available band information acquisition unit” (0202) acquires the available band information based on the detection result of the interference band detection unit (0201). The “detection result” is a detection result of the interference band. “Available band information” refers to information on usable bands excluding, for example, the interference band detected by the interference band detection unit (0201). Specifically, information based on the AFH method can be given. As described above, AFH is one of the functions of Bluetooth (registered trademark). Hereinafter, first, an outline of communication using Bluetooth (registered trademark) will be described, and an AFH method as an example of usable bandwidth information will be described. FIG. 3 is a diagram illustrating an example of frequency hopping performed by Bluetooth (registered trademark). “Frequency hopping” is a process of switching frequencies to be used one after another in a short time. Processing to avoid interference with other devices is performed by hopping in this way. The setting of the time zone and frequency band for hopping is called mapping. FIG. 3 shows a state of hopping of each piconet in the environment of FIG. A piconet is a unit of a Bluetooth (registered trademark) network as described above. As shown in FIG. 3, each piconet performs communication using a predetermined frequency along a hopping pattern generated by an independent random number at a certain time. In normal Bluetooth (registered trademark) communication, 79 types of hopping frequencies are prepared, and hopping is performed at regular time intervals using these 79 types of frequencies. In each piconet, since communication is performed based on an irregular hopping pattern generated independently, it is not easily affected by interference. As described above, Bluetooth (registered trademark) communications are usually hardly affected by interference, but when an external interference wave is generated, it follows the AFH system which is a technique for avoiding the external interference wave. Because all the piconets operate in the same way, the Bluetooth (registered trademark) piconet interferes with each other in the frequency band beyond the interference waves, despite the avoidance of extraneous interference waves. The problem of causing was caused. This point will be described below by taking hopping according to the AFH method as an example.

  FIG. 4 is a diagram illustrating an example of the AFH operation when an external interference wave is generated. As shown in FIG. 4A, when an external interference wave is generated at a predetermined frequency, each piconet performs a hopping process without using the interference band. By not using the interference band in this way, it is not necessary to interfere with other devices using the 2.4 GHz band such as a wireless LAN. As an example of the usable band information acquired by the usable band information acquisition unit (0202), when an external interference wave is generated in this way, a band other than the interference band detected along the AFH method is used. Information. In the example shown in FIG. 4A, “available band information” is information indicating frequency bands excluding F6 and F7 among frequency bands used for Bluetooth (registered trademark) communication.

  The “used bandwidth information acquisition unit” (0203) acquires the used bandwidth information based on the available bandwidth information. “Used band information” is information about a band used for hopping in a piconet. The used bandwidth information may be information generated based on information set by the user, as described in a later embodiment, or information stored in a fixed manner in a memory or the like of the communication device. Alternatively, it may be information calculated as a result of calculation by a CPU or the like in the communication device based on history information such as a band used so far. A description will be given based on the example of FIG. In the AFH method, mapping is performed so that the frequency bands F6 and F7 in which the external interference wave is detected are not used. Specifically, as shown in FIG. 4A, mapping is performed so that the hopping of each piconet is advanced in time. As a result, as shown in FIG. 4B, there is a case where interference between piconets occurs in the frequency band of the remapping destination. As described above, in the conventional AFH system that merely avoids the interference band, there is a case in which further interference occurs in the frequency band beyond the interference. Therefore, by acquiring information on the band used by each piconet at the hopping destination, it is possible to avoid interference in the previous frequency band avoiding the external interference wave.

  Since the used band information is acquired “based on the usable band information”, for example, when no external interference wave is generated, the conventional hopping process may be performed without acquiring the used band information. . This is because if the use band information is acquired and the hopping process is performed when no interference wave is generated, the band to be used is narrowed, so that the number of interferences increases. .

  As a specific example of the used band information, as shown in FIG. 5, information for fixing the band used by the piconet can be cited. In the example of the piconet 1 in FIG. 5, F8 and F5 correspond to the use band information, in the example of the piconet 2, F2 and F1 correspond to the use band information, and in the example of the piconet 3, F4 and F3 correspond to the use band information. In this way, each piconet acquires the use band information, so that even if an external interference wave is generated, the piconets do not interfere with each other in the save destination frequency band. In the example of FIG. 5, a case has been described as an example where each piconet acquires different usage band information. However, if the usage band information of each piconet overlaps, it is classified according to the priority order described later. Interference can be avoided by acquiring the used bandwidth information. As described above, the present invention is greatly different from the conventional AFH technology that merely avoids the interference band in that the use band information is acquired for the first time when an external interference wave is generated and a hopping pattern described later is generated. is there.

  A “hopping pattern generation unit” (0204) generates a hopping pattern based on the used band information. The “hopping pattern” is a pattern for a frequency band and a time unit when hopping. The “used bandwidth information” is used bandwidth information acquired by the used bandwidth information acquisition unit (0203). Referring to the example of FIG. 5, since the use band information acquired by the piconet 1 is F8 and F5, the hopping pattern generation unit (0204) performs hopping using the frequency bands of F8 and F5. Thus, a hopping pattern is generated. The hopping pattern generation unit (0204) may generate a hopping pattern in which not only the used band but also the time unit (cycle) for hopping is changed based on the used band information.

  The “communication unit” (0205) is for communicating according to the hopping pattern generated by the hopping pattern generation unit (0204). As an example of “communication”, a master terminal performs wireless communication with a slave terminal in each piconet. In this way, by performing communication using the hopping pattern generated based on the use band information, it is possible to prevent the interference from occurring in the frequency band beyond that in which the interference is avoided.

  Examples of the “communication device” (0200) include a device having a Bluetooth (registered trademark) communication function. Specific examples include a mobile phone, a PDA, and a notebook PC. Further, the communication device (0200) is not limited to these portable devices. For example, it may be a home appliance such as a television or a refrigerator equipped with a Bluetooth (registered trademark) communication function. This is because the 2.4 GHz band can be used by anyone, and may form a piconet even in the home.

<Processing flow of Embodiment 1>
FIG. 6 shows an example of the processing flow in this embodiment. The processing in the present embodiment includes the following steps. Note that the processing flow shown below can be implemented as a program to be executed by a computer or a readable recording medium on which the program is recorded (the same applies to the description of the processing flow in this specification). is there).

  First, it is determined whether an interference wave is detected (S0601). When an interference wave is detected, usable bandwidth information is acquired (S0602). Then, use band information is acquired based on the available band information acquired in step S602 (S0603). Then, a hopping pattern is generated based on the used bandwidth information acquired in step S0603 (S0604). Then, communication is performed according to the hopping pattern acquired in step S0604 (S0605). If communication is performed in step S0605 and another interference wave is detected, the process in step S0601 may be repeated.

<Effect of Embodiment 1>
The communication apparatus according to the present embodiment avoids interference in a band beyond the band in which interference has occurred by acquiring the used band information based on the available band information acquired based on the detection result of the interference band. It becomes possible. For this reason, since the occurrence of a decrease in communication speed or disconnection due to interference is reduced, stable communication can be realized.

<< Embodiment 2 >>
<Outline of Embodiment 2>
The present embodiment relates to a communication apparatus in which a hopping pattern generation unit generates a hopping pattern in two stages. By generating the hopping pattern in two stages, the processing corresponding to the conventional AFH can be used as it is.

<Configuration of Embodiment 2>
FIG. 7 shows an example of the configuration of the communication apparatus according to this embodiment. The “communication apparatus” (0700) of the present embodiment shown in FIG. 7 includes an “interference band detection unit” (0701), an “available band information acquisition unit” (0702), and a “used band information acquisition unit” (0703). ), A “hopping pattern generation unit” (0704), and a “communication unit” (0705). The hopping pattern generation unit (0704) includes a “primary generation unit” (0706), a “secondary generation unit” (0707), and a “hopping pattern output unit” (0708). Except for the “primary generation means” (0706), the “secondary generation means” (0707), and the “hopping pattern output means” (0708), the configurations are the same as those described in the first embodiment. Therefore, the description here is omitted.

  The “primary generation means” (0706) generates a primary hopping pattern based on the available bandwidth information. As a specific example, a primary hopping pattern is generated based on information about a band excluding the interference band detected by the interference band detection unit (0701), as in the conventional AFH method. The process of generating the hopping pattern based on the available bandwidth information in this manner is the same as the conventional Bluetooth (registered trademark) communication that performs the AFH process. Therefore, the communication apparatus of the present invention can be simply added by adding the subsequent processes. It can be configured.

  The “secondary generation means” (0707) re-maps the primary hopping pattern generated by the primary generation means (0706) based on the use band information to generate a secondary hopping pattern. “Remapping” is to re-set a hopping pattern such as a use band and a time unit. When remapping is performed using an already generated hopping pattern, a part of the hopping period and frequency band can be used when a new hopping pattern is generated, so the processing speed can be increased. . As a specific example, a hopping pattern is generated according to the AFH method, and then the generated hopping pattern (primary hopping pattern) is remapped to another hopping pattern (secondary hopping pattern) based on the use band information. Generating a hopping pattern). The “hopping pattern output means” (0708) outputs the secondary hopping pattern as a hopping pattern to be used by the communication unit (0705).

<Processing flow of Embodiment 2>
FIG. 8 shows an example of the flow of processing in this embodiment. The steps up to step S0802 are the same as those described in the first embodiment, and a description thereof will be omitted here. In step S0803, a primary hopping pattern is generated based on the available bandwidth information acquired in step S0802. In step S0803, used bandwidth information is acquired based on the available bandwidth information. Then, the primary hopping pattern generated in step S0803 is remapped based on the used bandwidth information acquired in step S0804 to generate a secondary hopping pattern (S0805). Then, the secondary hopping pattern generated in step S0805 is output as a hopping pattern to be used when performing communication (S0806). The subsequent processing is the same as that described in the first embodiment.

<Effect of Embodiment 2>
The communication device according to the present embodiment generates a primary hopping pattern based on the available bandwidth information, and remaps the primary hopping pattern based on the used bandwidth information to generate a secondary hopping pattern. Thus, it is possible to easily prevent interference in the band beyond the interference band by simply changing the processing used in the conventional AFH method.

<< Embodiment 3 >>
<Outline of Embodiment 3>
The present embodiment relates to a communication apparatus characterized in that information for setting use band information can be acquired. Since the use band information can be set, the probability that interference will occur can be reduced by the user setting an arbitrary band.

<Configuration of Embodiment 3>
FIG. 9 shows an example of the configuration of the communication apparatus in the present embodiment. As shown in FIG. 9, the “communication device” (0900) of this embodiment includes an “interference band detection unit” (0901), an “available band information acquisition unit” (0902), and a “used band information acquisition unit”. ”(0903),“ hopping pattern generation unit ”(0904), and“ communication unit ”(0905). The used band information acquisition unit (0903) includes a “used band setting information acquiring unit” (0906), a “used band determining unit” (0907), and a “used band information generating unit” (0908). Each configuration except for “used band setting information acquisition unit” (0906), “used band determining unit” (0907), and “used band information generation unit” (0908) has been described in the first or second embodiment. Since it is the same as that of a thing, description here is abbreviate | omitted.

  The “used band setting information acquisition unit” (0906) acquires used band setting information which is input information for determining the used band. “Defining the used bandwidth” means, for example, determining the used bandwidth to be included in the used bandwidth information. “Input information” is information input by, for example, the manufacturer of the communication device or the user using the communication device. Thus, since the “use band setting information” is input information for determining the use band, the user can arbitrarily set the use band. For this reason, for example, when a use band setting person is provided and the use band setting information is determined based on information from the person, an external interference wave is generated by setting a different use band for each piconet. In this case, it is possible to avoid interference in a frequency band beyond that in which interference is avoided.

  The “used band determining unit” (0907) determines the used band based on the used band setting information acquired by the used band setting information acquiring unit (0906). “Determining the use band based on the use band setting information” includes, for example, determining the input use band setting information as the use band as it is. Alternatively, when adjacent piconets exchange information on interference, the used bands set by other piconets may be determined not to be used bands.

  The “used band information generating unit” (0908) generates used band information based on the information indicating the used band determined by the used band determining unit (0907). The used bandwidth information generated in this way is acquired based on the available bandwidth information by the used bandwidth information acquisition unit (0903) as described above.

<Processing flow of Embodiment 3>
FIG. 10 shows an example of the processing flow in this embodiment. Steps up to step S1002 are the same as those described in the first or second embodiment, and a description thereof is omitted here. In step S1003, use band setting information is acquired. Then, the used band is determined based on the used band setting information acquired in step S1003 (S1004). Then, the used band information is acquired based on the information indicating the used band determined in step S1004 and the usable band information acquired in step S1002 (S1005). The subsequent processing is the same as that described in the first or second embodiment.

<Effect of Embodiment 3>
Since the communication device in the present embodiment can acquire information for setting the used band information, the user can arbitrarily determine the used band. For this reason, when an external interference wave is generated, it is possible to arbitrarily set the frequency band beyond that interference, so that interference can be avoided when the same user or the like forms a piconet.

<< Embodiment 4 >>
<Outline of Embodiment 4>
The present embodiment relates to a communication apparatus capable of storing a plurality of used band information. By accumulating a plurality of use band information, when an external interference wave is generated again at a place where interference is avoided, a hopping pattern can be generated using other use band information.

<Configuration of Embodiment 4>
FIG. 11 shows an example of the configuration of the communication apparatus in the present embodiment. As shown in FIG. 11, the “communication device” (1100) of this embodiment includes an “interference band detection unit” (1101), an “available band information acquisition unit” (1102), and a “used band information acquisition unit”. ”(1103),“ hopping pattern generation unit ”(1104),“ communication unit ”(1105), and“ used band information storage unit ”(1106). The used band information acquisition unit (1103) includes “accumulated used band information acquisition unit” (1107). Since the components other than the “used band information storage unit” (1106) and the “stored used band information acquisition unit” (1107) are the same as those described in any of the first to third embodiments, The description in is omitted.

  The “used band information storage unit” (1106) can store a plurality of used band information. The “accumulated used band information acquisition unit” (1107) acquires the used band information from the used band information storage unit (1106). By accumulating a plurality of used band information in this way and acquiring the used band information from the accumulated used band information, when avoiding an external interference wave based on the used band information, the frequency of the avoided destination frequency When an interference wave is generated again in the band, the interference can be avoided again by using the accumulated other used band information. Also, if a plurality of piconets with overlapping communication ranges acquire the same use band information, interference between piconets may occur by performing the same remapping as a result of avoiding external interference waves, In this case, it is possible to avoid interference between piconets by generating another hopping pattern by using the accumulated other used band information. If interference between piconets occurs, for example, a standby time is set with a random number in advance, and only when interference occurs after the standby time has elapsed, another band information is used again. A hopping pattern may be generated.

<Processing Flow of Embodiment 4>
FIG. 12 shows an example of the processing flow of the communication apparatus in this embodiment. Since step S1203 is the same as that described in any of the first to third embodiments except for step S1203, description thereof is omitted here. In step S1203, based on the available bandwidth information, used bandwidth information is acquired from a plurality of accumulated used bandwidth information.

<Effect of Embodiment 4>
The communication device of the present embodiment acquires use band information from a use band storage unit capable of storing a plurality of use band information, and in the case where an interference wave occurs again at a point where an external interference wave is avoided, In addition to avoiding the extraneous interference wave, interference between piconets in the avoided frequency band can be avoided. Further, even when the use band overlaps with another piconet, a different hopping pattern can be generated by acquiring other use band information.

<< Embodiment 5 >>
<Outline of Embodiment 5>
The present embodiment relates to a communication apparatus in which priorities are given to a plurality of stored use band information. Since the used band information can be acquired in accordance with the priority order, the used band information rich in flexibility can be used.

<Configuration of Embodiment 5>
FIG. 13 shows an example of the configuration of the communication apparatus according to this embodiment. As shown in FIG. 13, the “communication device” (1300) of the present embodiment includes an “interference band detection unit” (1301), an “available band information acquisition unit” (1302), and a “used band information acquisition unit”. ”(1303),“ hopping pattern generation unit ”(1304),“ communication unit ”(1305), and“ used band information storage unit ”(1306). The use band information storage unit (1306) includes a “priority holding unit” (1308). The used band information acquisition unit (1303) includes “accumulated used band information acquisition unit” (1307). The accumulated use band information acquisition unit (1307) includes a “priority acquisition unit” (1309). Since the components other than the “priority holding unit” (1308) and the “priority acquisition unit” (1309) are the same as those described in the fourth embodiment, the description thereof is omitted here.

  The “priority holding means” (1308) holds the accumulated used bandwidth information in association with the priority. The “priority order” is a priority order for the used bandwidth information. The “priority acquisition unit” (1309) acquires the used band information according to the priority order from the prioritized holding unit (1308) when acquiring the used band information stored in the used band information storage unit (1306). To do. In the case where each piconet does not use the same priority, duplication of used bandwidth information can be avoided by acquiring a plurality of accumulated used bandwidth information according to the priority. In this way, by acquiring a plurality of stored use band information according to the priority order, it is possible to use flexible use band information. For example, when the user sets the used band information, the occurrence of interference can be reduced by increasing the priority of the band that is difficult to interfere.

<Processing Flow of Embodiment 5>
FIG. 14 shows an example of the processing flow in this embodiment. Since each step except step S1403 is the same as that described in the fourth embodiment, description thereof is omitted here. In step S1403, based on the available bandwidth information, the used bandwidth information is acquired in accordance with the priority from the plurality of accumulated used bandwidth information.

<Effect of Embodiment 5>
The communication device according to the present embodiment can acquire use band information from a plurality of stored use band information according to the priority order, and therefore can use the use band information rich in flexibility.

  FIG. 15 shows an embodiment of the communication apparatus of the present invention. FIG. 15 is an example of a master terminal for Bluetooth (registered trademark) communication. The data received by the RF receiving unit (1508), which is an example of the communication unit, is demodulated by the demodulating unit (1507), transferred to the main processing unit, and simultaneously sent to the error rate (error rate) calculating unit (1509). The error rate is calculated and transmitted to the interference band detector (1504). The interference band detection unit (1504) detects interference based on the error rate of the demodulated data and the radio wave intensity information of the assumed frequency notified by the RF reception unit (1508), and hops the frequency band in which the interference occurs. It transmits to a pattern generation part (1523). The hopping pattern generation unit (1523), as an available band information acquisition unit, acquires a frequency band in which interference does not occur as available information, and determines the frequency band that is interfering according to the AFH method based on the available band information. Generate the removed hopping pattern. The hopping pattern generation unit (1523) stores the use band information set by the setting operation unit (1501), which is an example of the use band information acquisition unit, and the memory (1502), which is an example of the use band information storage unit. The used band information is acquired based on the available band information as a used band information acquisition unit, and the hopping pattern is mapped again so as to satisfy the used band information. The RF transmission unit (1506) and the RF reception unit (1508), which are examples of the communication unit, perform Bluetooth (registered trademark) communication using the remapped hopping pattern.

Conceptual diagram for explaining the first embodiment Functional block diagram for explaining the first embodiment Diagram for explaining frequency hopping A diagram for explaining the operation of AFH when an external interference wave is generated The figure for demonstrating the hopping pattern based on use band information The figure for demonstrating the flow of a process of Embodiment 1. FIG. Functional block diagram for explaining the second embodiment The figure for demonstrating the flow of a process of Embodiment 2. FIG. Functional block diagram for explaining the third embodiment The figure for demonstrating the flow of a process of Embodiment 3. Functional block diagram for explaining the fourth embodiment The figure for demonstrating the flow of a process of Embodiment 4. Functional block diagram for explaining the configuration of the fifth embodiment The figure for demonstrating the flow of a process of Embodiment 5. The figure for demonstrating the Example of this invention

Explanation of symbols

0200 Communication device 0201 Interference band detection unit 0202 Available band information acquisition unit 0203 Use band information acquisition unit 0204 Hopping pattern generation unit 0205 Communication unit

Claims (10)

An interference band detector for detecting the interference band;
An available band information acquisition unit for acquiring available band information based on the detection result in the interference band detection unit;
A used bandwidth information acquisition unit for acquiring used bandwidth information based on the available bandwidth information;
A hopping pattern generation unit that generates a hopping pattern based on the use band information;
A communication unit for communicating according to the hopping pattern generated by the hopping pattern generation unit;
A communication device. The hopping pattern generator
Primary generation means for generating a primary hopping pattern based on the available bandwidth information;
Secondary generation means for generating a secondary hopping pattern by remapping the primary hopping pattern generated by the primary generation means based on the use band information;
Hopping pattern output means for outputting the secondary hopping pattern as a hopping pattern to be used in the communication unit;
The communication device according to claim 1, comprising: The used bandwidth information acquisition unit
Used bandwidth setting information acquisition means for acquiring used bandwidth setting information which is input information for determining a used bandwidth;
Used bandwidth determining means for determining the used bandwidth based on the used bandwidth setting information acquired by the used bandwidth setting information acquiring means;
Used band information generating means for generating used band information based on information indicating the used band determined by the used band determining means;
The communication device according to claim 1, comprising: It further has a use band information storage unit capable of storing a plurality of use band information,
The communication device according to any one of claims 1 to 3, wherein the used band information acquiring unit includes a stored used band information acquiring unit configured to acquire used band information from a used band information storage unit. The use band information accumulating unit has a priority level holding means for holding the accumulated use band information in association with the priority order,
The accumulated use band information acquisition unit includes a priority acquisition unit that acquires use band information according to a priority order from the priority order holding unit when acquiring the use band information stored in the use band information storage unit. 4. The communication device according to 4. An interference band detection step for detecting the interference band;
An available band information acquisition step for acquiring available band information based on the detection result in the interference band detection step;
A used bandwidth information acquisition step for acquiring used bandwidth information based on the available bandwidth information;
A hopping pattern generation step of generating a hopping pattern based on the use band information;
A communication step for communicating according to the hopping pattern generated in the hopping pattern generation step;
A communication method. The hopping pattern generation step
A primary generation step of generating a primary hopping pattern based on the available bandwidth information;
A secondary generation step of generating a secondary hopping pattern by remapping the primary hopping pattern generated in the primary generation step based on the use band information;
A hopping pattern output step of outputting the secondary hopping pattern as a hopping pattern to be used in the communication step;
The communication method according to claim 6. The used bandwidth information acquisition step
Used bandwidth setting information acquisition step for acquiring used bandwidth setting information which is input information for determining the used bandwidth;
A used band determining step for determining a used band based on the used band setting information acquired in the used band setting information acquiring step;
A used band information generating step for generating used band information based on the information indicating the used band determined in the used band determining step;
The communication method according to claim 6 or 7, comprising:   The communication method according to any one of claims 6 to 8, wherein the use band information acquisition step includes a storage use band information acquisition step of acquiring use band information from a plurality of stored use band information. The use band information acquisition step includes a priority acquisition step of acquiring the use band information according to the priority order when acquiring the use band information in which a plurality of stored use band information is associated with the priority order. Communication method.

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