JP5674102B2 - Auxiliary device - Google Patents

Description

  The present invention relates to an auxiliary device that prevents interference in a wireless system sharing a frequency band in advance.

  Wireless LAN (WLAN) is the system that works best in the Industrial Science and Medical Band (ISM Band: Industry-Science-Medical). Products related to 802.11 are widespread and form a big market. However, due to the increase in ISM band usage, WLAN resources lack frequency resources that can achieve high throughput.

  Therefore, it is considered to operate a wireless device such as WLAN that does not require a license in a frequency band licensed for a specific application such as a radar band (3650-3700 MHz). In particular, regarding an unused channel (unused frequency) in the TV band known as TV white space (TVWS), specific studies are being made regarding restrictions on the use of the frequency that does not require a license. It is expected that WLAN will be able to operate in the band.

  By the way, when sharing a frequency band used by a wireless device that does not require a license and a licensed wireless device, the wireless device that does not require a license has been licensed because the priority for using the frequency band is low. Do not give radio equipment interference. In particular, when there are a plurality of wireless systems that do not require a license, it is necessary to avoid collision of communication between wireless devices that do not require a license in addition to avoiding interference with a licensed wireless device.

US Federal Communications Commission (FCC), “Second report and order and memorandum opinion and order”, FCC08-260, November 2008 IEEE standard 802.11y (registered trademark) -2008 IEEE standard 802.11 (registered trademark) -2007 IEEE standard 802.11af D0.03 IEEE standard draft 802.22 Draft v3.0

  Thus, in addition to the problem that interference may occur between wireless systems that share frequency bands (especially, wireless systems with higher priority than self), interference between wireless systems with lower priority is avoided. There was a problem that had to be done. An embodiment of the present invention has been made to solve such a problem, and an object of the present invention is to provide an auxiliary device capable of suppressing interference even when different wireless systems are mixed in a wireless device sharing a frequency band. .

  In order to solve the above-described problem, the auxiliary device according to the embodiment performs communication of a wireless device belonging to a second wireless system different from the first wireless system in which a frequency band to be used overlaps with the first wireless system. A measurement procedure providing unit that assists the wireless device and detects a radio wave of the first wireless system and exchanges the detection result, and the wireless device may interfere with the first wireless system A reset procedure providing unit that provides a procedure for causing the radio device to change at least one of the frequency and power used by the radio device, and a procedure provided by the measurement procedure providing unit and the reset procedure providing unit. And a transmission / reception unit for exchanging messages with the wireless device.

  Embodiments of the present invention can provide a wireless device that can suppress interference even if different wireless systems coexist in wireless devices that share a frequency band.

It is a block diagram which shows the structure of the radio | wireless system which concerns on embodiment. It is a conceptual diagram which shows the example of mounting of the radio | wireless system which concerns on embodiment. It is a flowchart which shows the operation example of the radio | wireless system which concerns on embodiment. It is a flowchart which shows the operation example of the radio | wireless system which concerns on embodiment. It is a flowchart which shows the operation example of the radio | wireless system which concerns on embodiment. It is a flowchart which shows the operation example of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the service element of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the information service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the information service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the information service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the information service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the information service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the reset service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows the example of the parameter in the event service of the radio | wireless system which concerns on embodiment. It is a figure which shows an example of the parameter of the event service of the radio | wireless system which concerns on embodiment. It is a figure which shows the specific example of the parameter of the information service of the radio | wireless system which concerns on embodiment. It is a figure which shows the specific example of the parameter of the reset service of the radio | wireless system which concerns on embodiment. It is a figure which shows the specific example of the parameter of the measurement service of the radio | wireless system which concerns on embodiment. It is a figure which shows the specific example of the parameter of the event service of the radio | wireless system which concerns on embodiment. It is a figure which shows the detail of the parameter of each service in the radio | wireless system which concerns on embodiment. It is a figure which shows the detail of the parameter of each service in the radio | wireless system which concerns on embodiment. It is a figure which shows the detail of the parameter of each service in the radio | wireless system which concerns on embodiment. It is a figure which shows the detail of the parameter of each service in the radio | wireless system which concerns on embodiment. It is a figure which shows the detail of the parameter of each service in the radio | wireless system which concerns on embodiment.

  (Configuration of Embodiment) The auxiliary device according to the embodiment will be described in detail below with reference to the drawings. In FIG. 1A, the primary system PS is a wireless device that is licensed in a specific channel of a predetermined frequency band and has a higher priority than other wireless stations in using the channel. The primary system PS corresponds to, for example, a radio device of a television broadcasting station licensed to use a specific channel in a television band. In the wireless system of this embodiment, a wireless device that does not require a license procedure shares a frequency (channel) that is not used by the primary system PS among frequency bands (bands) assigned to the primary system PS. Here, for example, it is assumed that an AP device and a client device (STA device) configuring a wireless LAN (WLAN) share a television band assigned to a television serving as a primary system PS.

  If the STA device shares the band assigned to the primary system PS, the STA device should not interfere with the primary system PS. For this reason, the STA device needs to confirm whether or not the channel to be used in the vicinity of the position overlaps with the channel assigned to the primary system PS, that is, whether or not interference can be given. This confirmation can be realized by referring to a database storing license information and frequency information. In addition, it is necessary for the STA device to monitor the channel to be used by itself and check the presence or absence of radio waves of a high priority wireless system such as the primary system PS. That is, it is desirable that the STA device has a function of referring to the database for frequency information and a function of measuring electromagnetic waves.

  If there are only wireless devices belonging to the same system around the STA device, it is sufficient that the STA device itself makes a database query. However, various simple wireless devices that do not require a license are used, and it is not efficient to query each database. In order to cope with such a state, an apparatus that accesses a database that covers frequency information according to a request and returns a possibility of interference may be arranged. The wireless system of this embodiment provides a coexistence apparatus (Co Existence: CE apparatus) that provides functions such as database search of the primary system, determination of possibility of interference, and sharing of frequency information to STA apparatuses belonging to different systems. ).

  As shown in FIG. 1A, in the wireless system of this embodiment, the STA device 1 that shares at least a part of the frequency band assigned to the primary system PS, the CE device 2 that performs free channel determination, and the CE device 2 are the primary system. It has a database device 3 for searching for PS information.

  The STA device 1 includes an antenna 11, an interface unit 1a, and a signal processing unit 1b. The interface unit 1a is an interface that connects the antenna 11 and the signal processing unit 1b. The interface unit 1a has a function of converting or decoding a signal transmitted or received by the signal processing unit 1b into a radio signal. The signal processing unit 1b is an arithmetic unit that processes a baseband signal, for example. The signal processing unit 1b may function as a WLAN access point by connecting to a higher priority network, or may communicate with other STA devices in an ad hoc manner. The interface unit 1a includes a reception unit 12, a transmission unit 13, a request analysis unit 14, a response analysis unit 15, a request generation unit 16, a response generation unit 17, and a definition table 18.

The receiving unit 12 receives a radio wave transmitted from a communication partner via the antenna 11 and demodulates it by a predetermined method. The transmission unit 13 modulates information for the communication partner to generate a radio signal, and transmits the wireless signal to the communication partner via the antenna 11. The receiving unit 12 also has a function of detecting and measuring (measuring) the strength (electric field strength) of radio waves from the primary system PS and other STA devices.
The request analysis unit 14 analyzes the content of request information received from the communication partner by the reception unit 12. The response analysis unit 15 analyzes the response information sent from the communication partner according to the request information sent from the STA device 1 to the communication partner via the transmission unit 13. The request generation unit 16 generates request information for the communication partner, and the response generation unit 17 generates response information (confirmation information) corresponding to the request information sent from the communication partner.
The definition table 18 stores information indicating a procedure (protocol) for the reception unit 12 and the transmission unit 13 to communicate with a communication partner. In this embodiment, the STA device 1 and the CE device 2 exchange not only normal communication but also information necessary to prevent interference with the primary system PS. Therefore, it is necessary to be able to communicate with a wireless device (for example, a CE device) belonging to a wireless system different from the wireless system to which the device belongs. In this embodiment, information describing such a procedure is stored in the definition table 18, and the reception unit 12 and the transmission unit 13 access the definition table, thereby realizing communication between different wireless systems.

  The STA device 1 can be realized using, for example, a system compliant with the IEEE 802.11 standard. Note that the frequency band used by the receiving unit 12 and the transmitting unit 13 is at least partially overlapped with the frequency band used by the primary system PS. In addition, the STA device 1 includes a mixture of devices of different systems (for example, IEEE802.11 and IEEE802.22).

The CE device 2 is a wireless device that selects and provides a channel (frequency) that can be used by the STA device 1 without the possibility of causing interference to the primary system PS from the frequency band used by the primary system PS. The CE device 2 includes an antenna 21, an interface unit 2a, and a coexistence control unit 2b. The interface unit 2a is an interface that connects the antenna 21 and the coexistence control unit 2b, and includes a receiving unit 22, a transmitting unit 23, a request analyzing unit 24, a response analyzing unit 25, a request generating unit 26, a response generating unit 27, and a definition table 28. have. That is, the interface unit 2a has a common functional configuration with the interface unit 1a of the STA device 1. That is, the interface unit 2a of the CE device 2 also has a definition table 28 having the same contents as the interface unit 1a of the STA device 1. That is, the STA device 1 and the CE device 2 are configured to be able to communicate with each other.
The coexistence control unit 2b exchanges messages with each of the STA apparatuses 1 belonging to different systems that use channels that are not used in the frequency band assigned to the primary system PS. The coexistence control unit 2b presents channels that can be used from the frequency band assigned to the primary system PS to the STA device 1. The coexistence control unit 2b also has a function of instructing the STA device 1 to detect radio waves of the primary system PS and sharing information such as channels that can be used between different STA devices 1.
The CE device 2 can be realized using, for example, a system compliant with the IEEE802.11 standard. However, the CE device 2 can communicate with a plurality of different wireless systems in order to exchange messages with the STA device 1 belonging to a different system. Configured to be able to.

  The database device 3 is a database that stores position information, frequency information, and the like of the primary system PS. The database device 3 is connected to the coexistence control unit 2b of the CE device 2 via a network such as the Internet. The database device 3 receives a query from the coexistence control unit 2b, searches the database, and returns the obtained information, for example, a list of channels that can be used from the frequency band assigned to the primary system PS, to the coexistence control unit 2b. It has a function.

(Service Element) In the wireless system of this embodiment, four types of services are defined for communication between the STA device 1 and the CE device 2, and each procedure (protocol) is stored in advance in the definition table. . That is, the definition tables 18 and 28 have data transfer procedure information divided into four parts: information service, resetting service, measurement service, and event service.
FIG. 6 illustrates an example of four service elements of the wireless system according to the embodiment. As shown in FIG. 6, the information service is a procedure group used when requesting or providing information between the STA device 1 and the CE device 2. The resetting service is a procedure group used when information in the STA device 1 is changed. The measurement service is a procedure used when the CE device 2 instructs the STA device 1 to detect the radio wave of the primary service PS, or when the STA device 1 returns a detection result to the CE device 2. The event service is a procedure used when a new STA device 1 appears or when a frequency that can be used in the frequency band assigned to the primary service PS is changed. 26A to 26D are diagrams illustrating specific examples of parameters used for the information service, the reset service, the measurement service, and the event service of the wireless system according to the embodiment. FIGS. 27A to 27E are wireless systems according to the embodiment. It is a figure which shows the detailed example of the parameter of each service in.

(Information Service) As shown in FIG. 6, the definition table defines six pieces of information as information services.
Information acquisition request information (COEX_INFO_OBTAINING.request) is information used when obtaining a parameter value. The information acquisition request information has an information parameter ID, and the type of information to be obtained is defined by the ID. 7A and 7B show examples of information parameter IDs. 8 shows an example of information corresponding to the available channel list in the information parameter ID, FIG. 9 shows an example of information corresponding to the network channel, and FIG. 10 shows an example of information corresponding to the antenna information. When the STA device 1 or the CE device 2 receives the information acquisition request information, the STA device 1 or the CE device 2 generates information acquisition confirmation information and returns the information acquisition request information to the partner that issued the information acquisition request information.
The information acquisition confirmation information (COEX_INFO_OBTAINING.confirm) is information used to give the requested information when the information acquisition request information is received. The information acquisition confirmation information includes status information of the requested information. If the status information is “successful”, the requested information is transmitted together. When the information cannot be obtained, status information of “failure” is included in the information acquisition confirmation information.
Information sharing request information (COEX_INFO_SHARING.request) is information used when the STA device 1 or the CE device 2 wants to share information. By using this information, it becomes possible to share information between the STA devices 1 belonging to different wireless systems via the CE device 2. The information sharing request information includes two parameters, an information destination (InfoDestination) and an information parameter ID (CoexInfoParamIds). The destination of information gives the other party with whom the STA apparatus 1 shares information. It is also possible to use one or more logical IDs of the CE device 2 that shares information by P2P or multicast with the STA device 1 registered in the CE device 2. In this case, information is broadcast to all the STA devices 1 registered in the CE device 2.
Information sharing confirmation information (COEX_INFO_SHARING.confirm) is used when sharing is permitted when information sharing request information is received. The information sharing confirmation information includes an information parameter ID that permits sharing.
Information provision request information (COEX_INFO_PROVISION.request) is used when providing information to be shared. The information provision request information includes the destination of information indicating the other party to be shared and the content of the information. Similarly to the information sharing request information, the destination of information in the information provision request information can be the logical ID of the CE device 2. The information sharing request information described above plays a role in consulting information sharing (not sharing information is sent). This is to save processing time and bandwidth. On the other hand, the information provision request information plays a role of sending information necessary for the system among the information that can be provided based on the information sharing confirmation information.
The information provision confirmation information (COEX_INFO_PROVISION.confirm) is information returned when information provision request information is received. The information provision confirmation information includes a provision status parameter (InfoProvisionStatus), and describes what has happened to the information provision request information issued by the STA device 1 or the like.
FIG. 7A, FIG. 7B, FIG. 8, FIG. 9 and FIG. 10 show examples of information / parameters used for exchanging information service messages among the information stored in the definition table. FIG. 26A shows a specific example of parameters used for the information service.

(Resetting Service) As shown in FIG. 6, the definition table defines two pieces of information as a resetting service. FIG. 26B shows a specific example of parameters used for the resetting service.
The reset request information (COEX_RCF.request) is information used when the CE device 2 requests the STA device 1 to reset the setting information such as the channel. The reset request information includes reset parameters indicating items to be reset. Upon receiving the reset request information, the STA device 1 executes a corresponding reset or performs a corresponding action. Upon receiving the reset request information, the STA device 1 returns reset confirmation information. FIG. 11 shows an example of the reset parameter.
The reset confirmation information (COEX_RCF.confirm) is information including a reset result parameter indicating the result of the reset request requested to the CE device 2. The STA device 1 returns reset confirmation information indicating the reset status in response to the reset request information. The CE device 2 that has received the reset confirmation information obtains a reset execution result or action if the result is “success”, and performs error processing if the result is “failure”. If resetting is performed with contents different from the reset contents requested by the reset request information, the reset confirmation information can include the actually reset contents.

(Measurement Service) As shown in FIG. 6, the definition table defines two pieces of information as a measurement service.
The measurement request information (COEX_MEAS.request) is information used when requesting measurement of a predetermined parameter. The measurement request information includes measurement parameters including a set of parameters such as a start frequency and a stop frequency. 12A and 12B show examples of measurement parameters. The CE device 2 makes a request for measurement control of the STA device 1 using the measurement request information.
The measurement confirmation information (COEX_MEAS.confirm) is information returned from the STA device 1 that has received the measurement request information to the CE device 2. The measurement confirmation information includes measurement result parameters including the status of the measurement request and the measurement result. When receiving the measurement confirmation information, the CE device 2 can obtain the requested measurement result if the status is “success”.
12A, 12B, 13, 14, 15A, 15B, 15C, 16, 17, 18, 18, 19, 20, 22, 22 and 23 show the measurement service parameters. An example is shown. FIG. 26C shows a specific example of parameters used for the measurement service.

(Event Service) As shown in FIG. 6, the definition table defines one piece of information as an event service.
Event indication information (COEX_EVENT.indication) is used to send information about events related to observed or predicted system coexistence. The event display information has an event parameter describing the event that has occurred. When the STA device 1 or the CE device 2 observes or predicts an event, the STA device 1 or the CE device 2 generates event display information and sends it to the related STA device 1 or CE device 2. 24 and 25 show examples of event parameters. FIG. 26D shows a specific example of parameters used for the event service.

  (Operation Example 1 of Embodiment) Here, an operation example of the wireless system of this embodiment will be described with reference to FIGS. 1A and 2. The operation example illustrated in FIG. 2 illustrates an operation when the user turns on the power of the STA device 1.

When the user turns on the power of the STA device 1, the request generation unit 16 of the STA device 1 generates event display information as shown in FIG. 24, and the transmission unit 13 transmits the event display information via the antenna 11 (step 101, hereinafter). (Referred to as “S101”)
The receiving unit 22 of the CE device 2 receives the event display information of the STA device 1 (S102). When the event display information is received, the request analysis unit 24 analyzes the contents of the event display information and requests the database device 3 to register the analysis result (S103).
The database device 3 registers the analysis content transmitted by the CE device 2 (S104), and requests the CE device 2 to acquire information (S105).

Upon receiving the information acquisition request, the request generation unit 27 of the CE device 2 generates information acquisition request information as shown in FIGS. 7A and 7B (S106), and the transmission unit 23 transmits the generated information acquisition request information. (S107).
When the receiving unit 12 receives the information acquisition request information, the request analyzing unit 14 analyzes the contents and acquires or generates information (S108). When the information is acquired or generated, the response generation unit 17 generates information acquisition confirmation information (S109) and transmits the information acquisition confirmation information via the transmission unit 13.
The response analysis unit 25 analyzes the information acquisition confirmation information received via the reception unit 22 (S110).

  (Operation Example 2 of Embodiment) Next, another operation example of the wireless system of this embodiment will be described with reference to FIGS. 1A and 3. The operation example illustrated in FIG. 2 illustrates an operation when the operation of the new STA device 1 is started.

When the user starts the operation of a new STA device 1, the request generation unit 16 of the STA device 1 generates event display information as shown in FIG. 24, and the transmission unit 13 transmits the event display information via the antenna 11 (S201).
The receiving unit 22 of the CE device 2 receives the event display information of the STA device 1 (S202). When the event display information is received, the request analysis unit 24 analyzes the content of the event display information and requests the database device 3 to register the event content (S203). That is, the presence of the new STA device 1 is notified to the database device 3.
The database device 3 registers the event content transmitted by the CE device 2 (S204), and requests the CE device 2 to acquire information (S205).

Upon receiving the information acquisition request, the request generation unit 26 of the CE device 2 generates information acquisition request information as shown in FIGS. 7A and 7B (S206), and the transmission unit 23 transmits the generated information acquisition request information. (S207).
When the receiving unit 12 receives the information acquisition request information, the request analyzing unit 14 analyzes the contents and acquires or generates information (S208). When the information is acquired or generated, the response generation unit 17 generates information acquisition confirmation information (S209) and transmits the information acquisition confirmation information via the transmission unit 13.
The response analysis unit 25 analyzes the information acquisition confirmation information received via the reception unit 22 (S210), and requests the database device 3 to update the registration information (S211).

The database device 3 updates the registered contents of the database (S212), and requests the radio detection of the primary system PS around the new STA device 1 (S213).
Upon receiving the radio wave detection request, the request generation unit 27 of the CE device 2 generates measurement request information as shown in FIGS. 12A and 12B (S214), and transmits the measurement request information via the transmission unit 23 (S215).
Upon receiving the measurement request information via the receiving unit 12, the request analysis unit 14 analyzes the content of the measurement request information and performs measurement processing (S216). Specifically, the request analysis unit 14 performs radio wave detection of the primary system PS using the reception unit 12.

When the measurement is completed, the response generation unit 17 generates measurement confirmation information including the measured data, and transmits the measurement confirmation information via the transmission unit 13 (S217).
When the reception unit 22 receives the measurement confirmation information, the response analysis unit 25 analyzes the content of the measurement confirmation information (S218). The response analysis unit 25 sends the content of the measurement confirmation information to the database device 3 (S219).
The database device 3 compares the measurement confirmation information with the list of the primary system PS in the database, and determines the possibility of interference (S220). As a result of the determination, if there is a possibility of interference, the database device 3 issues a reset request (S221).

Upon receiving the reset request, the request generator 26 generates reset request information (S222) and transmits it via the transmitter 23 (S223). The possibility of the occurrence of interference may be performed by the CE device 2 instead of the database device 3.
When the receiving unit 12 receives the reset request information, the request analyzing unit 14 analyzes the content of the reset request information and performs reset processing (S224). For example, the request analysis unit 14 executes setting of other channels among the available channels.

When the reset process is performed, the response generation unit 17 generates and transmits reset confirmation information (S225).
When the receiving unit 22 receives the reset confirmation information, the response analyzing unit 25 analyzes the contents of the reset confirmation information (S226), and if the resetting is successful, instructs the database apparatus 3 to register (S227). . Upon receiving the instruction, the database device 3 registers the reset contents (S228).

  (Operation Example 3 of Embodiment) Next, another operation example of the wireless system of this embodiment will be described with reference to FIGS. 1A and 4. The operation example illustrated in FIG. 4 illustrates an operation when the STA device 1 shares information such as channel information.

When the STA device 1 requests information sharing, the request generation unit 16 of the STA device 1 generates information sharing request information, and the transmission unit 13 transmits the information via the antenna 11 (S301).
The receiving unit 22 of the CE device 2 receives the information sharing request information of the STA device 1 (S302). When the information sharing request information is received, the request analysis unit 24 analyzes the content of the information sharing request information and notifies the database device 3 of the sharing request (S303). That is, the database device 3 is notified of the content of the sharing partner and the shared information.
The database device 3 confirms the sharing request transmitted by the CE device 2 (S304), and returns an ACK to the CE device 2 (S305).

Upon receiving the ACK, the response generation unit 27 of the CE device 2 generates information sharing confirmation information (S306), and the transmission unit 23 transmits the generated information sharing confirmation information (S307).
When the receiving unit 12 receives the information sharing confirmation information, the response analyzing unit 15 analyzes the contents and starts preparing information to be shared (S308). When the information is prepared, the request generation unit 16 generates information provision request information including information to be shared (S309), and transmits the information provision request information via the transmission unit 13.

The request analysis unit 24 analyzes the information sharing request information received via the receiving unit 22 (S310), and notifies the database device 3 of the sharing information (S311).
The database device 3 updates and registers the shared information in the database (S312), and returns ACK (S313).

When the ACK is received, the response generation unit 27 confirms the shared information and the shared partner (S314), and generates and transmits information provision confirmation information to the related partner (S315).
The response analysis unit 15 of the STA device 1 receives the information sharing confirmation information and confirms the establishment of information sharing and the database update (S316).

  (Operation Example 4 of Embodiment) Next, another operation example of the wireless system of this embodiment will be described with reference to FIGS. 1A and 5. The operation example shown in FIG. 5 shows an operation when the database contents of the database device 3 are updated.

The database device 3 notifies the CE device 2 when a change in the database content, for example, the operating frequency of the primary system PS occurs (S401).
Upon receiving the notification (S402), the request generation unit 26 generates event display information describing the contents of the occurrence and transmits the event display information via the transmission unit 23 (S403).
The receiving unit 12 receives the event display information, and the request analysis unit 14 confirms the content of the event display information (S404). If the event display information contains insufficient information, the request generation unit 14 generates information acquisition request information and transmits the information acquisition request information via the transmission unit 13 (S405).

  The request analysis unit 24 analyzes the content of the information acquisition request information (S406), and requests information from the database device 3 (S407). The database device 3 analyzes the content of the information request (S408), searches for information on the content, and returns the search content (S409).

Upon receiving the search content, the response generation unit 27 generates information acquisition confirmation information using the search content (S410), and the transmission unit 21 transmits the information acquisition confirmation information (S411).
The reception unit 12 of the STA device 1 receives the information acquisition confirmation information via the reception unit 12, and the response analysis unit 15 analyzes the information acquisition confirmation information (S412).

  Here, with reference to FIG. 1B, a mounting example of the auxiliary device (interface units 1a and 2a) of this embodiment will be described. The auxiliary device of this embodiment is an interface for exchanging information on coexistence between devices using a TV band (TVBD) scheduled to be defined by the IEEE802.11af and IEEE802.22 standards, and also defined by the IEEE802.19.1 standard. It can be used as a coexistence system scheduled to be made.

  In FIG. 1B, (1) indicates a mounting position when mounting as an interface of a management device of the TVBD network / device. Similarly, (2) shows the mounting position when implemented as an SAP interface that can be used as a convergence function of a TVBD network / device. For example, MSGCF (MAC State Generic Convergence Function) of an IEEE802.11 device. -CS or Convergence Sublayer (CS) of BS / CPE device of IEEE802.22-SAP. Similarly, (3) shows the mounting position when mounting as an SAP interface that can be used in the MAC or PHY (physical layer) of the TVBD network / device. For example, MLME (MAC subLayer Management Entity) -SAP or PLME ( Physical Layer Management Entity) -SAP.

According to the auxiliary device of this embodiment, a table storing data transfer procedure information that enables communication with a system of a different system is provided, and communication is performed using this table. In the case of coexistence, interference prevention and other information can be exchanged between wireless devices belonging to different systems.
In addition, according to the auxiliary device of this embodiment, as data transfer procedure information, information services for exchanging information, resetting services for supporting resetting such as channel setting, primary services and other wireless devices belonging to different systems It is equipped with information divided into four types: measurement services that measure electric field strength, etc., and event services that exchange event information that contributes to interference prevention, such as primary service operation trends and new wireless devices, and communicate using these information To achieve message exchange to prevent interference when a primary system with a high priority for using radio waves and a wireless device with a low frequency of use that share the same frequency band with the primary system are mixed. Can do. Furthermore, even if a plurality of wireless systems having a common frequency band with a lower priority of radio wave use than the primary system are mixed, message exchange for preventing interference can be realized.

  In addition, this invention is not limited only to the said embodiment and its operation example. The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... STA apparatus, 1a ... interface part, 1b ... signal processing part, 11 ... antenna, 12 ... reception part, 13 ... transmission part, 14 ... request analysis part, 15 ... response analysis part, 16 ... request generation part, 17 ... Response generation unit, 18 ... definition table, 2 ... CE device, 2a ... interface unit, 2b ... coexistence control unit, 21 ... antenna, 22 ... reception unit, 23 ... transmission unit, 24 ... request analysis unit, 25 ... response analysis unit , 26 ... request generation unit, 27 ... response generation unit, 28 ... definition table, 3 ... database device, PS ... primary system.

Claims (1)

An auxiliary device for assisting communication of a wireless device belonging to a second wireless system whose frequency band to be used overlaps with the first wireless system and is different from the first wireless system,
A measurement procedure providing unit for providing a procedure for causing the wireless device to detect radio waves of the first wireless system and exchanging the detection results;
A frequency band to be used overlaps with the first wireless system, and the second wireless system is connected to a wireless device belonging to a third wireless system that is different from the first wireless system and the second wireless system. A shared procedure providing unit that provides a procedure for exchanging at least one of a frequency and a maximum allowable transmission power that can be used by a wireless device to which the wireless device belongs;
When the wireless device belonging to the second wireless system which may give interference to the first wireless system, the wireless device belonging to the second wireless system to change at least one of frequency and power to use A reconfiguration procedure providing unit that provides the procedure of
A transmission / reception unit for exchanging messages with the wireless device by applying a procedure provided by the measurement procedure providing unit and the resetting procedure providing unit ;
The resetting procedure providing unit changes at least one of a frequency and power used by a wireless device belonging to the second wireless system when there is a possibility of causing interference to the third wireless system. The auxiliary device according to claim 1.

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