JP2019016875A - Wireless communication device - Google Patents

Abstract

To avoid interference with other wireless networks that may approach in the future.SOLUTION: A wireless communication device according to the present invention includes a reception unit, a determination unit, and an interference avoidance control unit. The reception unit receives, from a first hub, information on a first wireless network centered on the first hub and information on a second wireless network in the vicinity of the first hub. On the basis of the information on the second wireless network and information on a third wireless network centered on the wireless communication device, the determination unit determines the possibility of interference between the third wireless network and the second wireless network. The interference avoidance control unit controls wireless resource allocation in the third wireless network so as to avoid interference with the second radio network on the basis of the determination result of the possibility of interference.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for predicting and avoiding interference between networks.

  WBAN (Wireless Body Area Network) is built by connecting wireless communication devices called nodes, which are installed on the surface of the user's body or in the body, or carried by the user, around wireless communication devices called hubs. A small wireless network. The node typically has a function as a sensor device that measures a body temperature, an electrocardiogram, a pulse, a triaxial acceleration and the like in addition to a function as a wireless communication device. The hub is, for example, a smartphone, and can collect sensor data from the node and monitor a user's health status, activity status, and the like in real time. SmartBAN is currently standardized as a WBAN standard for medical healthcare.

  If the user carrying the hub moves, the coverage of the WBAN around the hub also moves in the same way. Therefore, when users carrying hubs approach each other, interference may occur between WBANs centered on these hubs.

  In Patent Document 1, for example, [0012] to [0015] and FIG. 1, a technique for avoiding interference between two adjacent or overlapping WBANs is proposed. Specifically, it is described that the hub acquires information such as BAN priority of adjacent WBAN, frequency hopping information, and the like, and determines whether to avoid collision based on these information.

JP 2017-011701 A

  In the technique of Patent Document 1, information such as BAN priority and frequency hopping information is acquired from the WBAN that is adjacent or overlapping, and collision avoidance is performed based on such information. In other words, the technique of Patent Document 1 cannot perform collision avoidance for a WBAN that is not adjacent or overlapped, that is, a WBAN that does not receive the radio wave. However, in the future, such WBAN may approach and cause interference.

  The present invention aims to avoid interference with other wireless networks that may approach in the future.

  According to one aspect of the present invention, a wireless communication apparatus includes a reception unit, a determination unit, and an interference avoidance control unit. The receiving unit receives, from the first hub, information on the first wireless network centered on the first hub and information on the second wireless network in the vicinity of the first hub. The determination unit may cause interference between the third wireless network and the second wireless network based on the information on the second wireless network and the information on the third wireless network centered on the wireless communication device. It is determined whether or not there is. The interference avoidance control unit controls radio resource allocation in the third radio network so as to avoid interference with the second radio network based on the determination result of the possibility of interference.

  According to the present invention, it is possible to avoid interference with other wireless networks that may approach in the future.

1 is a block diagram illustrating a wireless communication apparatus according to an embodiment. The figure which illustrates arrangement | positioning of several BAN. The figure which illustrates the peripheral BAN information preserve | saved at the hub H1 of FIG. The figure which illustrates the peripheral BAN information preserve | saved at the hub H2 of FIG. The figure which illustrates the peripheral BAN information preserve | saved at the hub H3 of FIG. The figure which illustrates arrangement | positioning of several BAN. The figure which illustrates the peripheral BAN information preserve | saved at the hub H1 of FIG. The figure which illustrates the peripheral BAN information preserve | saved at the hub H2 of FIG. The figure which illustrates the peripheral BAN information preserve | saved at the hub H3 of FIG. The figure which illustrates the peripheral BAN information preserve | saved at the hub H4 of FIG. 3 is a flowchart illustrating the operation of the wireless communication apparatus in FIG. 1. The flowchart which illustrates the detail of the interference determination process of FIG.

  Hereinafter, embodiments will be described with reference to the drawings. Hereinafter, elements that are the same as or similar to elements already described are denoted by the same or similar reference numerals, and redundant descriptions are basically omitted.

  In the following description, for the sake of simplicity, the description will be made on the premise of BAN, particularly SmartBAN, but BAN can be generalized as a wireless network.

(Embodiment)
The wireless communication device according to the embodiment of the present invention receives information from another wireless communication device (hub) on another BAN that is in the vicinity of the hub and cannot be directly received by the wireless communication device. Then, the wireless communication apparatus determines whether or not there is a possibility of interference between the own BAN and another BAN using the information of the other BAN, and performs interference avoidance control. Therefore, according to this wireless communication apparatus, it is possible to avoid interference with other BANs that cannot be directly received but may approach in the future.

  As illustrated in FIG. 1, the wireless communication apparatus according to the embodiment includes a reception unit 101, a BAN information management unit 102, a peripheral BAN information storage unit 103, a self BAN information storage unit 104, and an interference determination unit 105. An interference avoidance control unit 106, a transmission unit 107, a data management unit 108, and a data storage unit 109. The wireless communication apparatus in FIG. 1 is a hub serving as the center of a BAN and can be connected to one or more nodes.

  The receiving unit 101 basically receives data such as sensor data from a node connected to the wireless communication apparatus of FIG. The receiving unit 101 sends the received data to the data management unit 108. The receiving unit 101 may receive BAN information from other BANs that can be directly received. This BAN information includes, in addition to the information about the BAN that is the transmission source of the information, information about the other BAN that is directly received by another wireless communication device that is the center of the BAN. The receiving unit 101 sends the received BAN information to the BAN information management unit 102.

  In addition, the receiving unit 101 may receive control information from a node connected to the wireless communication apparatus in FIG. The received control information is used, for example, to determine allocation of radio resources for radio communication in a BAN (hereinafter simply referred to as self-BAN) centering on the radio communication apparatus of FIG. The radio resource may be, for example, a combination of a channel, more specifically, a data channel for exchanging data and a unit time using the channel, more specifically, a slot. The radio resource allocation in the own BAN is notified from the interference avoidance control unit 106 to the receiving unit 101.

  The receiving unit 101 may measure the received signal strength and generate an RSSI (Received Signal Strength Indicator) representing the received signal strength. The RSSI of the signal transmitted by the other wireless communication device that is the source of the BAN information is, for example, information that implicitly indicates the position of the other wireless communication device, for example, the other wireless communication device shown in FIG. It can be used as information for estimating the distance to the wireless communication device. It is known as Friis's formula that the received power in free space is inversely proportional to the square of the distance, that is, attenuates in proportion to the square of the distance.

  Furthermore, the receiving unit 101 may measure the error rate of each channel used by the wireless communication apparatus of FIG. The error rate information of each channel is transmitted to other wireless communication devices, for example, and can be used to detect the possibility of interference in the channel.

  The BAN information management unit 102 receives the BAN information from the receiving unit 101, configures the peripheral BAN information by adding necessary information, and stores the peripheral BAN information in the peripheral BAN information storage unit 103 (it can be said that the peripheral BAN information is updated). . For example, the BAN information management unit 102 adds the RSSI of a signal transmitted by another wireless communication device that is a transmission source of BAN information as a part of BAN information centered on the other wireless communication device. May be. Further, the BAN information management unit 102 may receive the error rate information of each channel from the reception unit 101 and store it in the own BAN information storage unit 104 as a part of the own BAN information.

  Peripheral BAN information includes information for identifying a BAN or a wireless communication device that is the center of the BAN, information indicating whether or not the information of the BAN is obtained by direct reception, RSSI associated with the BAN, and the BAN The information indicating the date and time of the information and the information indicating the radio resource used by the BAN may be included.

  The RSSI associated with the BAN obtained by direct reception may be the RSSI in the wireless communication apparatus in FIG. 1 of the signal transmitted by the hub that is the transmission source of the information. On the other hand, the RSSI associated with the BAN that is not obtained by direct reception is included in advance in the received BAN information.

  In addition to the RSSI, or in addition to the RSSI, information that explicitly indicates the position of the hub of the BAN obtained by some positioning technology such as GPS (Global Positioning System) may be used. These pieces of information are useful for evaluating how close each BAN hub is to the wireless communication device of FIG.

  In any case, based on the history of information that is received multiple times and that explicitly or implicitly indicates the position of the hub of the BAN, the hub of the BAN approaches the wireless communication apparatus of FIG. You can also analyze whether it is moving or moving away.

  The date and time of BAN information obtained by direct reception may be a time stamp indicating the reception date and time of the information. On the other hand, the date and time of BAN information obtained by direct reception is included in advance in the received BAN information.

  The self-BAN information may include information for identifying the self-BAN or the wireless communication apparatus of FIG. 1 and information indicating a radio resource used by the BAN. In addition, the self-BAN information may further include information on the error rate of each channel in this BAN.

  The BAN information management unit 102 reads the peripheral BAN information and the self BAN information from the peripheral BAN information storage unit 103 and the self BAN information storage unit 104, respectively, as necessary. The BAN information management unit 102 transmits the read information to the interference determination unit 105 for interference determination or to the transmission unit 107 for notification to other hubs. For example, the BAN information management unit 102 may read out the peripheral BAN information and the self-BAN information with the reception of new BAN information or the arrival of a predetermined timing as a trigger.

  The BAN corresponding to the peripheral BAN information stored in the peripheral BAN information storage unit 103 is a target of interference determination described later. The BAN information management unit 102 can save the processing load associated with the interference determination by deleting the information of the BAN whose possibility of interference is low. Specifically, the BAN information management unit 102 may delete the information of the BAN with which the associated date / time is old. Whether or not the date and time is old can be determined, for example, by comparing an elapsed time from the date and time to the current date and a threshold value. Alternatively, the BAN information management unit 102 may delete BAN information that is not included in the latest BAN information received from the wireless communication device, among the BAN information received in the past from a certain wireless communication device.

  Peripheral BAN information storage unit 103 reads and writes peripheral BAN information by BAN information management unit 102. The self-BAN information storage unit 104 is read / written by the BAN information management unit 102.

  Hereinafter, two specific examples of BAN arrangement will be described with reference to FIG. 2 to FIG. 10, and under these BAN arrangements, what BAN information is stored by the hub of each BAN and which BAN is targeted Next, whether to perform interference determination and interference avoidance control will be described.

  A first example of a BAN arrangement is shown in FIG. The BAN arrangement of FIG. 2 includes three BANs, each centered on three hubs H1, H2 and H3. In FIG. 2, broken circles centered on H1, H2, and H3 represent the coverage of the BAN centered on each hub. That is, the hub H1 can directly receive the signal transmitted by the hub H3, but cannot directly receive the signal transmitted by the hub H2. The hub H2 can directly receive the signal transmitted by the hub H3, but cannot directly receive the signal transmitted by the hub H1. The hub H3 can directly receive the signal transmitted by the hub H2, but cannot directly receive the signal transmitted by the hub H1.

In this case, the peripheral BAN information stored in the peripheral BAN information storage unit 103 of the hubs H1, H2, and H3 is illustrated in FIGS. 3, 4, and 5, respectively.
The hub H1 cannot directly receive the information of the BAN of the hub H2 transmitted from the hub H2. However, since the BAN information is received by the hub H3, the hub H1 can indirectly receive the BAN information via the hub H3 as illustrated in FIG. That is, the hub H1 can perform interference determination and interference avoidance control for the BAN of the hub H3 that cannot be directly received by the hub H1.

  The hub H2 cannot directly receive the information of the BAN of the hub H1 transmitted from the hub H1. In addition, since the information of the BAN cannot be received directly by the hub H3, the hub H2 does not detect the BAN of the hub H1 at this time, and does not detect the BAN of the hub H3. Never do.

  Similarly, the hub H3 cannot directly receive the information of the BAN of the hub H1 transmitted from the hub H1. Further, since the information of the BAN cannot be directly received by the hub H2, the hub H3 does not detect the presence of the BAN of the hub H1 at this time and targets the BAN as illustrated in FIG. Interference determination is not performed.

  A second example of the BAN arrangement is shown in FIG. The BAN arrangement of FIG. 6 includes four BANs, each centered on four hubs H1, H2, H3 and H4. In FIG. 6, as in FIG. 2, broken circles centered on H1, H2, H3, and H4 represent the coverage of the BAN centered on each hub. That is, the hub H1 can directly receive the signals transmitted by the hub H2 and the hub H3, but cannot directly receive the signals transmitted by the hub H4. The hub H2 can directly receive signals transmitted by the hub H1, but cannot directly receive signals transmitted by the hub H3 and the hub H4. Hub H3 can directly receive signals transmitted by hub H1 and hub H4, but cannot directly receive signals transmitted by hub H2. The hub H4 can directly receive the signals transmitted by the hub H3, but cannot directly receive the signals transmitted by the hub H1 and the hub H2.

In this case, the peripheral BAN information stored in the peripheral BAN information storage unit 103 of the hubs H1, H2, H3, and H4 is illustrated in FIGS. 7, 8, 9, and 10, respectively.
The hub H1 cannot directly receive the information of the BAN of the hub H4 transmitted from the hub H4. However, since the BAN information is received by the hub H3, as illustrated in FIG. 7, the hub H1 can indirectly receive the BAN information via the hub H3. That is, the hub H1 can perform interference determination and interference avoidance control for the BAN of the hub H4 that cannot be directly received by the hub H1.

  The hub H2 cannot directly receive the information of the BAN of the hub H3 transmitted from the hub H3. However, since the BAN information is received by the hub H1, the hub H2 can indirectly receive the BAN information via the hub H1, as illustrated in FIG. That is, the hub H2 can perform interference determination and interference avoidance control for the BAN of the hub H3 that cannot be directly received by the hub H2. On the other hand, the hub H2 cannot directly receive the information of the BAN of the hub H4 transmitted from the hub H4. Further, since the information of the BAN cannot be directly received by the hub H1, the hub H2 does not detect the BAN of the hub H4 at this time, and does not detect the BAN of the hub H1, so that the interference determination is performed on the BAN. Never do.

  The hub H3 cannot directly receive the information of the BAN of the hub H2 transmitted from the hub H2. However, since the BAN information is received by the hub H1, the hub H3 can indirectly receive the BAN information via the hub H1, as illustrated in FIG. That is, the hub H3 can perform interference determination and interference avoidance control for the BAN of the hub H2 that cannot be directly received by the hub H3.

  The hub H4 cannot directly receive the information of the BAN of the hub H1 transmitted from the hub H1. However, since the BAN information is received by the hub H3, the hub H4 can indirectly receive the BAN information via the hub H3 as illustrated in FIG. That is, the hub H4 can perform interference determination and interference avoidance control for the BAN of the hub H1 that cannot be directly received by the hub H4. On the other hand, the hub H4 cannot directly receive the information of the BAN of the hub H2 transmitted from the hub H2. Further, since the information of the BAN cannot be received directly by the hub H3, the hub H4 does not detect the BAN of the hub H2 at this time, and does not detect the BAN of the hub H3, and performs the interference determination for the BAN. Never do.

  The interference determination unit 105 receives the peripheral BAN information and the self-BAN information from the BAN information management unit 102, and there is a possibility of interference between the self-BAN and the BAN corresponding to the peripheral BAN information, that is, the BAN subject to the interference determination. It is determined whether or not there is. BANs that are subject to interference determination include BANs that cannot be directly received by the own BAN but can be indirectly received in addition to the BAN that can be directly received by the own BAN. The interference determination unit 105 sends a determination result about the possibility of interference to the interference avoidance control unit 106.

  Specifically, the interference determination unit 105 determines whether or not there is a possibility of interference by comparing the radio resource used by the own BAN and the radio resource used by the BAN subject to interference determination. . In other words, if both are close to each other during the time when the self-BAN and the BAN subject to interference determination use the same channel, interference will occur. Therefore, the interference determination unit 105 determines that there is a possibility of interference when the radio resource used by the own BAN and the radio resource used by the BAN to be subjected to interference determination match. Here, the match does not need to be a complete match, and can be read as a duplicate.

  Note that the interference determination unit 105 may omit the interference determination conditionally for a BAN that cannot be directly received by the own BAN but can be indirectly received. For example, if the own BAN is sufficiently away from the BAN and there is a low possibility that interference with the BAN will occur in the near future, it can be said that the adverse effect is small even if the interference avoidance control is not performed for the BAN. Furthermore, it is possible to reduce the processing load associated with interference determination and interference avoidance control, and to secure more selectable radio resources when changing radio resources for interference avoidance control with other BANs. It becomes possible.

  Specifically, when the BAN information includes information that explicitly or implicitly indicates the position of the wireless communication device that is the center of the BAN, the interference determination unit 105 uses the information. For example, the distance between the two may be calculated and compared with a threshold value to determine whether or not the own BAN is sufficiently away from the BAN.

  Alternatively, when the RSSI associated with the BAN is included in the information of the BAN, the interference determination unit 105 associates with the second BAN that cannot be directly received by the own BAN but can be indirectly received. 1 and the first RSSI associated with the first BAN centered on the first hub that has transmitted the information of the second BAN to the wireless communication apparatus of FIG. An index of the distance from the wireless communication device to the second hub serving as the center of the second BAN may be calculated. Then, the interference determination unit 105 may determine that the own BAN is sufficiently separated from the second BAN when the index is equal to or greater than the threshold. Here, the index of distance can be, for example, an index of distance from the wireless communication apparatus of FIG. 1 to the second hub via the first hub. For example, an index of the distance from the wireless communication apparatus of FIG. 1 to the first hub is calculated based on the first RSSI, and the first hub to the second hub is calculated based on the second RSSI. Is calculated by calculating an index of the distance up to and calculating the sum of the two.

  The interference avoidance control unit 106 controls radio resource allocation in the own BAN so as to avoid interference between the own BAN and the BAN that is determined to have the possibility of interference. Specifically, the interference avoidance control unit 106 changes the radio resource assignment as necessary so that a radio resource different from that of the BAN determined to have the possibility of interference is used in the own BAN. So avoiding interference between the two. The interference avoidance control unit 106 notifies the reception unit 101 and the transmission unit 107 of the changed radio resource allocation.

  By the way, even if the radio resource assignment is not changed in both of the two BANs having the possibility of interference, the interference between the two can be avoided by changing the radio resource assignment on one side. Therefore, the interference avoidance control unit 106 may determine, using some scale, whether the allocation of radio resources should be changed in either the own BAN or the BAN determined to have the possibility of interference. Good. The measure can be, for example, the importance calculated for each BAN by the same criteria. The importance of the BAN may be transmitted as part of the information of the BAN. The interference avoidance control unit 106 compares the importance of the own BAN with the importance of the BAN determined to have the possibility of interference. If the former is higher than the latter, the interference avoidance control unit 106 changes the radio resource allocation in the own BAN. It may be omitted. On the other hand, the interference avoidance control unit 106 changes the allocation of radio resources in the own BAN when the importance of the own BAN is equal to or less than the importance of the BAN determined to have the possibility of interference. Thus, the processing load can be reduced by changing the assignment of radio resources in the own BAN with conditions.

  As shown in the relationship between the hub H1 and the hub H2 or the hub H3 in the BAN arrangement example of FIG. 2, the first hub detects the presence of the second hub, but the second hub is the first. It is possible that the presence of other hubs is not detected. In this case, if the first hub does not change the allocation of radio resources, interference may occur between the BAN of the first hub and the BAN of the second hub. For this reason, the interference avoidance control unit 106 may unconditionally change the allocation of radio resources in the own BAN in order to reliably avoid interference with the BAN that is determined to have the possibility of interference.

  The transmission unit 107 receives from the BAN information management unit 102 at least the BAN information obtained by direct reception of the self-BAN information and the neighboring BAN information, and transmits them. The information transmitted by the transmitting unit 107 may include BAN information that cannot be directly received by the hub that will receive the information. Therefore, a hub that has received such information can perform interference determination and interference avoidance control for a BAN that cannot be directly received by the hub. Note that BAN information obtained by indirect reception among neighboring BAN information may be excluded from information transmitted by the transmission unit 107.

  In addition, the transmission unit 107 may transmit control information to a node connected to the wireless communication apparatus in FIG. The control information to be transmitted is used, for example, to notify each node of radio resource allocation in the own BAN. The interference avoidance control unit 106 notifies which channel the transmission unit 107 should use, that is, allocation of radio resources in the own BAN.

  The data management unit 108 receives data from the reception unit 101 and stores it in the data storage unit 109. The data storage unit 109 is read and written by the data management unit 108. The data stored in the data storage unit 109 may be read for an upper application that provides the user with, for example, a medical healthcare related service by using the data.

  Hereinafter, an operation example of the wireless communication apparatus in FIG. 1 will be described with reference to FIGS. 11 and 12. In the operation example of FIG. 11, for convenience of explanation, (a) the wireless communication apparatus of FIG. 1 receives BAN information from another hub and updates the peripheral BAN information (steps S201 to S202). (B) Performing interference determination and interference avoidance control based on the neighboring BAN information (step S210 to step S223), and (c) transmitting at least a part of the own BAN information and the neighboring BAN information (step S224). It is said. However, since these operations (a) to (c) can be performed independently, the execution order of FIG. 11 is merely an example.

  In step S201, the receiving unit 101 receives information about the first BAN centered on the hub and information about the second BAN around the hub from another hub. The BAN information management unit 102 updates the peripheral BAN information using the BAN information received in step S201 (step S202).

  In step S210, the interference determination unit 105 determines whether or not there is a possibility of interference based on the surrounding BAN information, that is, interference between the own BAN and the BAN that is the target of the interference determination. Details of step S210 will be described later with reference to FIG.

  The interference avoidance control unit 106 determines whether or not to change radio resource allocation in the own BAN based on the determination result in step S210 (step S221). Specifically, the interference avoidance control unit 106 unconditionally changes the radio resource allocation in the own BAN when it is determined that there is a possibility of interference between the own BAN and the BAN subject to interference determination. You may decide to do so, or you may further consider the aforementioned BAN importance or other measures.

  If the interference avoidance control unit 106 determines that the radio resource allocation in the own BAN should be changed, the process proceeds to step S222; otherwise, the process proceeds to step S223.

  In step S222, the interference avoidance control unit 106 changes the radio resource allocation in the own BAN, and notifies the reception unit 101 and the transmission unit 107 of the changed radio resource allocation.

  In step S223, it is determined whether all the BANs grasped by the peripheral BAN information are taken into consideration, that is, whether or not there remains a BAN that is not subject to interference determination and interference avoidance control. If a BAN that is not subject to interference determination and interference avoidance control remains, the process returns to step S210. If interference determination and interference avoidance control have already been performed for all BANs, the process proceeds to step S224. move on.

  In the example of FIG. 11, interference determination and interference avoidance control are repeated in units of BAN. However, interference avoidance control may be performed collectively after performing interference determination for all BANs. In this case, step S223 is not necessary.

  In step S224, the transmitting unit 107 transmits at least a part of the self-BAN information and the surrounding BAN information, specifically, the BAN information obtained by direct reception.

  Next, details of step S210 will be described with reference to FIG. First, the interference determination unit 105 selects one of the BANs grasped from the surrounding BAN information as a target of the current interference determination (step S211), and the process proceeds to step S212.

  The interference determination unit 105 determines whether the information of the BAN selected in step S211 is obtained by direct reception or indirect reception (step S212). If the information of the selected BAN is obtained by direct reception, the process proceeds to step S214, and if not, the process proceeds to step S213.

  In step S213, the interference determination unit 105 determines whether or not the own BAN is sufficiently away from the selected BAN. As described above, for this determination, information that explicitly or implicitly indicates the position of the hub that is the center of the selected BAN, such as position information measured by GPS, RSSI, or the like can be used. If the own BAN is sufficiently away from the selected BAN, the process proceeds to step S216; otherwise, the process proceeds to step S214.

  Note that steps S212 and S213 correspond to processing for omitting the interference determination in step S214 conditionally for a BAN that cannot be directly received by the own BAN but can be indirectly received. Therefore, when the interference determination of step S214 is also performed unconditionally for such BAN, step S212 and step S213 are unnecessary.

  In step S214, the interference determination unit 105 determines whether the radio resource used by the own BAN matches the radio resource used by the BAN selected in step S211. If both radio resources match, the process proceeds to step S215; otherwise, the process proceeds to step S216.

  In step S215, the interference determination unit 105 generates a determination result that there is a possibility of interference between the own BAN and the BAN selected in step S211. On the other hand, in step S216, the interference determination unit 105 generates a determination result that there is no possibility of interference between the own BAN and the BAN selected in step S211.

  As described above, the wireless communication apparatus according to the embodiment receives information from another hub that is in the vicinity of the hub and cannot be directly received by the wireless communication apparatus. Then, the wireless communication apparatus determines whether or not there is a possibility of interference between the own BAN and another BAN using the information of the other BAN, and performs interference avoidance control. Therefore, according to this wireless communication device, the presence of other BANs that cannot be directly received but may approach in the future is determined in advance (before the BAN can be directly received by this wireless communication device). It is possible to avoid the interference by detecting, determining whether there is a possibility of interference with the BAN, and changing the assignment of the radio resource as necessary.

  The above-described embodiments are merely specific examples for helping understanding of the concept of the present invention, and are not intended to limit the scope of the present invention. The embodiment can add, delete, or convert various components without departing from the gist of the present invention.

  The various functional units described in the above embodiments may be realized by using a circuit. The circuit may be a dedicated circuit that realizes a specific function, or may be a general-purpose circuit such as a processor.

  At least a part of the processing of each of the above embodiments can also be realized by using a general-purpose computer as basic hardware. A program for realizing the above processing may be provided by being stored in a computer-readable recording medium. The program is stored in the recording medium as an installable file or an executable file. Examples of the recording medium include a magnetic disk, an optical disk (CD-ROM, CD-R, DVD, etc.), a magneto-optical disk (MO, etc.), and a semiconductor memory. The recording medium may be any recording medium as long as it can store the program and can be read by the computer. The program for realizing the above processing may be stored on a computer (server) connected to a network such as the Internet and downloaded to the computer (client) via the network.

DESCRIPTION OF SYMBOLS 101 ... Reception part 102 ... BAN information management part 103 ... Neighboring BAN information storage part 104 ... Self-BAN information storage part 105 ... Interference determination part 106 ... Interference avoidance control part 107 ...・ Transmission unit 108 ... Data management unit 109 ... Data storage unit

Claims (5)

A wireless communication device,
A receiving unit for receiving, from the first hub, information on a first wireless network centered on the first hub and information on a second wireless network in the vicinity of the first hub;
Based on the information on the second wireless network and the information on the third wireless network centered on the wireless communication device, there is a possibility of interference between the third wireless network and the second wireless network. A determination unit for determining whether or not there is,
An interference avoidance control unit configured to control radio resource allocation in the third radio network so as to avoid interference with the second radio network based on a determination result of the possibility of interference. apparatus.   The wireless communication apparatus according to claim 1, further comprising a transmission unit configured to transmit information on the first wireless network and information on the third wireless network. The information of the second wireless network includes information that explicitly or implicitly indicates the position of the second hub that is the center of the second wireless network,
The determination unit omits determination of a possibility of interference between the second wireless network and the third wireless network when the position of the second hub satisfies a predetermined condition. To
The wireless communication apparatus according to claim 1 or 2. The receiving unit measures a received signal strength of a signal transmitted by the first hub to generate a first RSSI (Received Signal Strength Indicator),
The information of the second wireless network includes a second RSSI representing a received signal strength at the first hub of a signal transmitted by a second hub serving as a center of the second wireless network,
The determination unit calculates an index of a distance from the wireless communication device to the second hub based on the first RSSI and the second RSSI, and when the index is greater than or equal to a threshold, Omitting the determination of the possibility of interference between the second wireless network and the third wireless network;
The wireless communication apparatus according to claim 1 or 2. The second wireless network and the third wireless network are assigned importance calculated according to the same criteria,
The determination unit further determines whether the importance of the third wireless network is less than or equal to the importance of the second wireless network;
The interference avoidance control unit determines that there is a possibility of interference between the third radio network and the second radio network, and the degree of importance of the third radio network is the second radio network. Changing the radio resource allocation in the third radio network so as to avoid interference with the second radio network when it is determined that the importance is less than or equal to the radio network;
The wireless communication apparatus according to any one of claims 1 to 4.