JPWO2018092372A1 - Communication terminal, communication method, program, and wireless system - Google Patents

Abstract

Data reception performance in a base station is improved. A receiving unit that receives data broadcast from a first terminal of a first group, and whether or not to transmit the received data to a base station is determined based on the type of the data. Transmitting the data to the base station by using a radio resource different from the radio resource assigned to the first group and a radio judgment resource assigned to a second group different from the first group A communication terminal. [Selection] Figure 1

Description

  The present disclosure relates to a communication terminal, a communication method, a program, and a wireless system.

  Currently, various services are provided for wireless communication services and wired communication services. In the communication service, the type of data communicated by the communication service is set, and the communication service may be provided based on the type of data.

  Patent Document 1 describes that data priority is set as the above-described data type, and a communication service according to the data priority is provided. Specifically, Patent Literature 1 discloses a wireless station that determines whether or not to relay received data to another terminal based on the priority of the received data.

JP 2008-294605 A

  In the communication system disclosed in Patent Document 1, communication resources used by a radio station that relays data are not considered. Therefore, even if data is relayed, congestion or interference may occur, and it is uncertain whether reception performance at the destination terminal will improve. Therefore, in the present disclosure, a communication terminal, a communication method, a program, and a wireless system that can improve data reception performance in a base station are proposed.

  According to the present disclosure, a receiving unit that receives data broadcast from a first terminal of a first group, and whether or not to transmit the received data to a base station based on the type of the data A transmission determination unit for determining, and a radio resource assigned to a second group different from the first group and a radio resource different from the radio resource assigned to the first group, to the base station There is provided a communication terminal comprising a transmitting unit for transmitting.

  Also, according to the present disclosure, whether to receive data broadcast from a first terminal of a first group and whether to transmit the received data to a base station based on the type of the data. And transmitting the data to the base station using a radio resource assigned to a second group different from the first group and different from a radio resource assigned to the first group And a communication method is provided.

  Further, according to the present disclosure, the processor is configured to receive data broadcast from the first terminal of the first group, and to transmit the received data to the base station based on the type of the data. And transmitting the data to the base station using a radio resource assigned to a second group different from the first group and different from a radio resource assigned to the first group. A program is provided.

  In addition, according to the present disclosure, a wireless system, wherein the wireless system is broadcast from a first terminal of a first group that broadcasts data and the first terminal of the first group. A second group of second terminals for determining whether to transmit the data received from the first terminal to a base station based on the type of data, the second terminal comprising: There is provided a wireless system that transmits the data to the base station using a radio resource assigned to a second group that is different from the radio resource assigned to the first group.

  As described above, according to the present disclosure, the data reception performance in the base station is improved.

  The above effects are not necessarily limited, and any of the effects shown in the present specification or other effects that can be grasped from the present specification are exhibited together with or in place of the above effects. May be.

FIG. 1 is a diagram schematically illustrating a wireless system according to an embodiment of the present disclosure. FIG. 2 is a diagram illustrating an example of a frame format transmitted by a normal class terminal or a high function class terminal in the embodiment of the present disclosure. FIG. 3 is a block diagram illustrating an example of a configuration of the base station according to the embodiment of the present disclosure. FIG. 4 is a block diagram illustrating an example of a configuration of a normal class terminal according to an embodiment of the present disclosure. FIG. 5 is a block diagram illustrating an example of a configuration of a high-function class terminal according to an embodiment of the present disclosure. FIG. 6 is a diagram illustrating an example of frequencies allocated to the normal class terminal and the high function class terminal in the embodiment of the present disclosure. FIG. 7 is a diagram illustrating an example of spreading codes used by a normal class terminal and a high function class terminal in the embodiment of the present disclosure. FIG. 8 is a diagram illustrating an example of processing for combining data received from a normal class terminal and data received from a high-function class terminal in the embodiment of the present disclosure. FIG. 9 is a diagram illustrating an example of spreading codes used by a normal class terminal and a high function class terminal in the embodiment of the present disclosure. FIG. 10 is a diagram illustrating an example of the frequency with which the normal class terminal and the high function class terminal transmit data in the embodiment of the present disclosure. FIG. 11 is a block diagram illustrating an exemplary configuration of a normal class terminal according to an embodiment of the present disclosure. FIG. 12 is a diagram illustrating an example of time slots allocated to a normal class terminal and a high function class terminal in the embodiment of the present disclosure. FIG. 13 is a diagram illustrating another example of time slots allocated to a normal class terminal and a high function class terminal in the embodiment of the present disclosure. FIG. 14 is a diagram illustrating an example of transmission power of a normal class terminal and a high function class terminal according to an embodiment of the present disclosure. FIG. 15 is a flowchart illustrating an example of processing in which a high-function class terminal according to an embodiment of the present disclosure determines radio resources to transmit data. FIG. 16 is a diagram illustrating an example in which radio resource allocation is changed in the embodiment of the present disclosure. FIG. 17 is a diagram illustrating an example in which radio resource allocation is changed in the embodiment of the present disclosure. FIG. 18 is a block diagram illustrating an exemplary configuration of a normal class terminal according to an embodiment of the present disclosure. FIG. 19 is a block diagram illustrating an example of a configuration of a high-function class terminal according to an embodiment of the present disclosure. FIG. 20 is a flowchart illustrating an example of a process of changing assignment of radio resources for transmitting data by a normal class terminal according to an embodiment of the present disclosure. FIG. 21 is a flowchart illustrating an example of a process of changing assignment of radio resources for transmitting data by the high-function class terminal according to the embodiment of the present disclosure. FIG. 22 is a flowchart illustrating an example of a process of changing assignment of radio resources for transmitting data by a normal class terminal according to an embodiment of the present disclosure. FIG. 23 is a diagram illustrating an example in which radio resource allocation is changed in the embodiment of the present disclosure. FIG. 24 is a diagram illustrating an example in which radio resource allocation is changed in the embodiment of the present disclosure. FIG. 25 is a diagram illustrating an example in which the high function class terminal according to the embodiment of the present disclosure transmits a failure notification to the base station. FIG. 26 is a block diagram illustrating an example of a configuration of a high-function class terminal according to an embodiment of the present disclosure. FIG. 27 is a diagram illustrating an example in which the high-function class terminal according to the embodiment of the present disclosure determines a normal class terminal to be monitored based on an instruction from the base station. FIG. 28 is a block diagram illustrating an exemplary configuration of a base station according to an embodiment of the present disclosure. FIG. 29 is a block diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. FIG. 30 is a diagram illustrating an example in which the base station according to the embodiment of the present disclosure determines a path failure of a normal class terminal.

  Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

The description will be given in the following order.
1. 1. Configuration of wireless system according to this embodiment 1-1. About overall configuration of wireless system 1-2. Configuration example of base station 1-3. Configuration example of normal class terminal 1-4. 1. Configuration example of high function class terminal 2. Assignment of radio resources to normal class terminals and high function class terminals 2-1. Static radio resource allocation 2-2. 2. Dynamic radio resource allocation 3. Modification of wireless system of this embodiment 3-1. Example in which failure notification is notified to base station by high function class terminal 3-2. Example in which a monitoring target terminal instruction is transmitted to a high-function class terminal 3-3. 3. An example in which a base class terminal determines a route failure of a normal class terminal Supplement 5. Conclusion

<< 1. Configuration of wireless system according to the present embodiment >>
<1-1. About overall configuration of wireless system>
FIG. 1 is a schematic diagram illustrating a wireless system according to an embodiment of the present disclosure. As shown in FIG. 1, the wireless system of this embodiment includes a base station 100, a normal class terminal 200, and a high function class terminal 300. For example, the normal class terminal 200 belongs to a first group in which the terminal class is classified into the normal class, and the high function class terminal 300 belongs to a second group in which the terminal class is classified into the high function class. Yes. That is, the communication terminal of this embodiment is classified according to the terminal class, such as a high-function class or a normal class.

  In FIG. 1, the normal class terminal 200 broadcasts data acquired by various sensors provided in the normal class terminal 200. Further, the high function class terminal 300 transfers the data received from the normal class terminal 200 to the base station 100 based on the type of data received from the normal class terminal 200 as described later.

  The base station 100 receives data transmitted from the normal class terminal 200 and the high function class terminal 300, and the wireless system provides various services using the received data. The services provided by the wireless system are diverse, such as a service for checking the temperature of the management target and a service for managing the behavior of the management target. For example, when the normal class terminal 200 having a temperature sensor is installed in a vending machine, a service for checking the temperature to be managed may be provided. At this time, the application server or the like acquires temperature information from the normal class terminal 200 via the base station 100, thereby providing the temperature status of the vending machine. In addition, when the normal class terminal 200 having an acceleration sensor is attached to a domestic animal such as a cow or a pig, a service for managing the behavior to be managed may be provided. At this time, an application server or the like obtains information on the movement of livestock from the normal class terminal 200 via the base station 100, so that a service for managing the behavior of livestock on the pasture may be provided.

  For this reason, the normal class terminal 200 has a sensor function. For example, the sensor function can be realized by various sensors such as an acceleration sensor, a gyro sensor, a temperature sensor, an atmospheric pressure sensor, a sound pressure sensor, a pulse sensor, or a GPS (Global Positioning System).

  In the present embodiment, an example in which the normal class terminal 200 has a sensor function will be described. However, the present embodiment can also be applied to an example in which the normal class terminal 200 does not have a sensor function. For example, the normal class terminal 200 may be supplied with data from an external device and broadcast the supplied data to the base station 100. When the external device is a vending machine, sales data may be supplied from the vending machine to the normal class terminal 200, and the normal class terminal 200 may broadcast the sales data to the base station 100.

  As described above, the normal class terminal 200 is assigned to a person or an object in the wireless system of the present embodiment. Due to restrictions on installation location, battery replacement, and charging for the normal class terminal 200, the normal class terminal 200 is required to be downsized and driven for a long time. For this reason, since the normal class terminal 200 operates with a battery with a limited capacity, it is important to reduce power consumption.

  From the viewpoint of reducing power consumption, it is not desirable to perform complex signal processing in the normal class terminal 200, and the function or performance of the normal class terminal 200 may be limited compared to the high function class terminal 300. For example, the normal class terminal 200 has only a function of broadcasting data and may not have a reception function.

  In the wireless system of this embodiment, it is assumed that many normal class terminals 200 are installed. Therefore, interference may occur due to data transmission from a large number of normal class terminals 200. Due to this interference, data broadcast from the normal class terminal 200 may not be normally received by the base station 100.

  Therefore, in the wireless system of the present embodiment, the data broadcast by the normal class terminal 200 includes identification information indicating the type of the data as will be described later. The high function class terminal 300 receives the data broadcast from the normal class terminal 200 and transfers the received data to the base station 100 according to the type of the received data. Here, the data transferred by the high-function class terminal 300 is data with high priority, and the priority is determined by the type of data.

  For example, data including identification information indicating the occurrence of a fire may be determined to be high priority, and data including identification information indicating that the temperature is regularly notified is determined to be low priority. Also good. Moreover, the priority of data may be determined based on the priority represented by the numbers of 1 to 5 in stages. For example, the priority may be determined to be higher as the priority number is smaller. Note that data determined to have a low priority may be discarded in the high function class terminal 300.

  Further, the high function class terminal 300 transmits data received from the normal class terminal 200 to the base station 100 using radio resources different from the radio resources used by the normal class terminal 200. As described above, since the high function class terminal 300 transmits high priority data to the base station 100, the data amount transmitted by the high function class terminal 300 is smaller than the data amount transmitted by the normal class terminal 200. Therefore, interference in radio resources allocated to the high-function class terminal 300 is smaller than interference in radio resources allocated to the normal class terminal 200. As a result, the reception performance with which the base station 100 receives data from the high-function class terminal 300 is improved. That is, in the wireless system of the present embodiment, the reception performance in the base station 100 of high priority data among the data broadcast by the normal class terminal 200 is improved.

  As described above, the normal class terminal 200 broadcasts data, and the high function class terminal 300 also transfers the data received from the normal class terminal 200 to the base station 100. Thus, in the wireless system of the present embodiment, the base station 100 receives data from the normal class terminal 200 and further receives the same data from the high function class terminal 300. Therefore, the base station 100 can receive higher priority data with high probability. Further, the high function class terminal 300 transmits data received from the normal class terminal 200 using radio resources different from the radio resources used by the normal class terminal 200. As a result, the high-function class terminal 300 can transmit data using radio resources with little interference, and the data reception performance of the base station 100 is improved.

  FIG. 2 is a diagram illustrating an example of a frame format transmitted by the normal class terminal 200 and the high function class terminal 300. As shown in FIG. 2, the frames transmitted by the normal class terminal 200 and the high function class terminal 300 include a preamble part 11, a header part 12, a data part 13, and an FCS (Frame Check Sequence) part. .

  The preamble unit 11 is a signal pattern used for frame detection in the base station 100. The preamble unit 11 is composed of signals of the same pattern for giving a timing for synchronization. The header portion 12 includes the terminal ID of the normal class terminal 200 or the high function class terminal 300 that transmits the frame. The terminal ID may be a unique number of the normal class terminal 200 or the high function class terminal 300, for example.

  The data unit 13 is data for use in the application server, and may include data such as acceleration information, position information, temperature information, or time information. The FCS unit 14 is used to detect an accidental error in a frame based on CRC (Cyclic Redundancy Check) that is an error detection code.

<1-2. Example of base station configuration>
The overall configuration of the wireless system according to the present embodiment has been described above. Below, the structure of the base station 100 in the radio | wireless system of this embodiment is demonstrated. FIG. 3 is an explanatory diagram showing the configuration of the base station 100 according to the present embodiment. As illustrated in FIG. 3, the base station 100 according to the present embodiment includes a wireless communication unit 120, a synchronization unit 140, a demodulation unit 160, and a control unit 180.

  The radio communication unit 120 performs reception processing of radio signals transmitted from the normal class terminal 200 and the high function class terminal 300 and transmission processing of radio signals to the high function class. More specifically, the radio communication unit 120 converts the radio signal transmitted from the normal class terminal 200 and the high function class terminal 300 into an electric signal by the antenna, and performs analog processing and down conversion on the electric signal. To output a baseband received signal. The radio communication unit 120 up-converts the baseband transmission signal supplied from the control unit 180, converts the electrical signal obtained by the up-conversion into a radio signal by the antenna, and transmits the radio signal. Note that the wireless communication unit 120 may include a transmission unit 260 that transmits a signal and a reception unit that receives the signal.

  The synchronization unit 140 detects a preamble from the reception signal output from the wireless communication unit 120. Specifically, the synchronization unit 140 calculates the correlation between one or more signal patterns and the received signal while shifting the received signal to be calculated on the time axis, and based on the appearance of the correlation peak To detect the preamble. Further, the synchronization unit 140 acquires synchronization for the received signal based on the shift amount of the received signal when the correlation peak is obtained.

  Demodulation section 160 cuts out header section 12, data section 13 and FCS section 14 in the frame shown in FIG. 2 from the received signal based on the synchronization acquired by synchronization section 140. Then, the demodulation unit 160 attempts to demodulate each information.

  The control unit 180 controls the overall operation of the base station 100. For example, when the demodulation unit 160 succeeds in demodulating data, the control unit 180 may control the wireless communication unit 120 so that ACK is transmitted to the high-function class terminal 300 that is the transmission source of the data.

<1-3. About configuration example of normal class terminal>
The configuration of the base station 100 of this embodiment has been described above. Below, the structure of the normal class terminal 200 in the radio | wireless system of this embodiment is demonstrated. FIG. 4 is an explanatory diagram showing the configuration of the normal class terminal 200 according to the present embodiment. As shown in FIG. 4, the normal class terminal 200 according to the present embodiment includes a transmission unit 260, a control unit 240, and a sensor unit 220.

  The transmission unit 260 transmits a radio signal according to a predetermined frame format. More specifically, the transmission unit 260 broadcasts a radio signal to the base station 100. More specifically, the transmission unit 260 up-converts the baseband transmission signal supplied from the control unit 240, converts the electrical signal obtained by the up-conversion into a radio signal using an antenna, and broadcasts it. Note that the transmission unit 260 may transmit data using LPWA (Low Power Wide Area) capable of long-distance transmission with low power consumption.

  The control unit 240 controls the overall operation of the normal class terminal 200. The control unit 240 controls the transmission unit 260 to transmit data using the radio resource allocated to the normal class terminal 200, acquires various types of information from the sensor unit 220, and information acquired from the sensor unit 220 And a transmission frame including identification information indicating the data type and the type of the data. Here, the type of data may include information on position information, temperature information, humidity information, intrusion information, fire occurrence information, lifesaving notification, and the like. Further, the data type may be information indicating the priority of the data. The type of data may include priorities represented by numbers 1 to 5 step by step. For example, the smaller the number, the higher the priority.

  Note that the control unit 240 may generate different types of data based on the data acquired from the sensor unit 220. For example, when the temperature of the management object is equal to or lower than a predetermined threshold, the control unit 240 generates data whose data type is temperature information, and when the temperature of the management object is higher than the predetermined threshold, the data type is Data that is fire occurrence information may be generated. Of course, each normal class terminal 200 may continue to generate the same type of data. That is, each normal class terminal 200 may continue to generate data of a preset type.

  The control unit 240 may generate a transmission frame such that the identification information indicating the type of data described above is indicated by the preamble unit 11 having the frame format described with reference to FIG. The control unit 240 may generate a transmission frame so that the identification information indicating the type of data described above is indicated by a specific bit in the header part 12 of the frame format. For example, the type of data may be indicated by a different preamble or may be indicated by a specific bit in the header.

  The sensor unit 220 includes a sensor device that acquires various types of information. For example, the sensor unit 220 may include a sensor device such as a GPS receiving unit 280, an acceleration sensor, a gyro sensor, a temperature sensor, an atmospheric pressure sensor, a sound pressure sensor, and a pulse sensor.

<1-4. Configuration example of high-function class terminal>
The configuration of the normal class terminal 200 according to the present embodiment has been described above. Hereinafter, the configuration of the high-function class terminal 300 in the wireless system of the present embodiment will be described. FIG. 5 is an explanatory diagram showing the configuration of the high-function class terminal 300 according to the present embodiment. As illustrated in FIG. 5, the high-function class terminal 300 according to the present embodiment includes a wireless communication unit 320 and a control unit 340, and the control unit 340 includes a transmission determination unit 342.

  The wireless communication unit 320 transmits and receives wireless signals in accordance with a predetermined frame format as shown in FIG. More specifically, the radio communication unit 320 performs reception processing of a radio signal broadcast from the normal class terminal 200 and transmission processing of a radio signal to the base station 100. The wireless communication unit 320 may include a transmission unit 260 that transmits a signal and a reception unit that receives the signal. Similarly to the normal class terminal 200, the wireless communication unit 320 may perform communication using LPWA, or perform communication using Wi-Fi or LTE (Long Term Evolution) different from the normal class terminal 200. Also good.

  The control unit 340 controls the overall operation of the high function class terminal 300. The control unit 340 controls the wireless communication unit 320 to transmit and receive data using a predetermined frame format and wireless resources assigned to the high function class terminal 300. The transmission determination unit 342 of the control unit 340 determines the type of the data based on identification information indicating the type of data included in the data received from the normal class terminal 200. The transmission determining unit 342 determines whether to transmit the data to the base station 100 according to the determined data type.

  For example, when the type of data received from the normal class terminal 200 is temperature information, the control unit 340 determines that the data has low priority and discards the received data without transferring it to the base station 100. May be. On the other hand, when the type of data received from the normal class terminal 200 is fire occurrence information, the control unit 340 determines that the data has high priority and transfers the received data to the base station 100. The wireless communication unit 320 may be controlled.

  The control unit 340 may generate a transmission frame such that the identification information indicating the type of data described above is indicated by the preamble unit 11 of the frame format. The control unit 340 may generate a transmission frame such that the identification information indicating the type of data described above is indicated by a specific bit in the header portion 12 of the frame format.

  3, 4, and 5 can be configured by hardware or a central processing unit such as a CPU and a program (software) for causing it to function. When each component is composed of a central processing unit such as a CPU and a program for causing it to function, the program is stored in a recording medium such as a memory provided in each device.

<< 2. Allocation of radio resources to normal class terminals and high function class terminals >>
In the above, each structure of the radio | wireless system of this embodiment was demonstrated. Hereinafter, radio resources allocated to the normal class terminal 200 and the high function class terminal 300 in the radio system according to the present embodiment will be described. As described above, in the wireless system of the present embodiment, the high-function class terminal 300 transfers data received from the normal class terminal 200 to the base station 100 according to the type of data. In the wireless system of this embodiment, the normal class terminal 200 and the high function class terminal 300 transmit data using different wireless resources.

  Therefore, it is assumed that the interference in the radio resource used by the high function class terminal 300 to transmit data is smaller than the interference in the radio resource used by the normal class terminal 200 to transmit data. Therefore, the high-function class terminal 300 can transfer data to the base station 100 using radio resources with less interference, and data reception performance at the base station 100 is improved. Note that the radio resources are, for example, frequency resources, code resources, and time resources.

<2-1. About static radio resource allocation>
First, an example in which radio resources are statically allocated to the normal class terminal 200 and the high function class terminal 300 in the radio system according to the present embodiment will be described.

(Frequency resource)
FIG. 6 is a diagram showing that different frequency bands are allocated to the normal class terminal 200 and the high function class terminal 300. As shown in FIG. 6, different frequency bands with the same frequency bandwidth may be allocated to the normal class terminal 200 and the high function class terminal 300. Further, different frequency bands with different frequency bandwidths may be allocated to the normal class terminal 200 and the high function class terminal 300. For example, the frequency bandwidth allocated to the high function class terminal 300 may be larger or smaller than the frequency bandwidth allocated to the normal class terminal 200.

  When the frequency bandwidth allocated to the high function class terminal 300 is larger than the frequency bandwidth allocated to the normal class terminal 200, the reception performance of data with high priority in the base station 100 is further improved. When the frequency bandwidth allocated to the normal class terminal 200 is larger than the frequency bandwidth allocated to the high function class terminal 300, a large number of normal class terminals 200 are accommodated in the wireless system of the present embodiment.

(Code resource)
FIG. 7 is a diagram showing that different spreading codes are allocated to the normal class terminal 200 and the high function class terminal 300 as radio resources. For example, in the case of a communication method using direct spread spectrum, a different spreading code is assigned to each class of terminal. In FIG. 7, the spread code A is assigned to the normal class terminal 200, and the normal class terminal 200 spreads the data to be transmitted using the spread code A. Similarly, the high function class terminal 300 is assigned a spread code B different from the spread code A, and the high function class terminal 300 spreads data to be transmitted using the spread code B.

  Base station 100 decodes the received data by computing the received data with a despread code. Here, the base station 100 may preferentially perform demodulation processing on data detected by a high-function class spreading code (spreading code B in FIG. 7). By this processing, the reception performance of high priority data in the base station 100 is improved.

  Further, as described above, when different spreading codes are assigned for each class of terminals, the base station 100 may combine the same data received from both the normal class terminal 200 and the high function class terminal 300. As shown in FIG. 8, the base station 100 receives the same data from the high-function class terminal 300 after receiving the data from the normal class terminal 200. The base station 100 combines the data received from the normal class terminal 200 and the data received from the high function class terminal 300 and then performs demodulation processing, whereby the data reception performance in the base station 100 is improved.

  However, in order for the base station 100 to combine the data, the base station 100 must determine that the two data are the same data before performing the demodulation process. As described above, when different frequencies are assigned to different classes of terminals, if the high function class terminal 300 transfers the data received from the normal class terminal 200 as it is, the normal class terminal 200 uses a different spreading code for each terminal. By using and transmitting data, the base station 100 can determine that the data received from the high-function class terminal 300 and the data received from the normal class terminal 200 are the same data.

  When the spreading code assigned to each terminal class is different, as shown in FIG. 9, the first half of the spreading code depends on the data transmission source terminal, and the second half of the spreading code is the class of the terminal. The base station 100 can determine that the data received from the high function class terminal 300 and the data received from the normal class terminal 200 are the same data. That is, if the parts of the spread code that depend on the terminal are the same, base station 100 determines that the two data are the same data.

(Time resource)
Different time resources may be allocated to the normal class terminal 200 and the high function class terminal 300. For example, as shown in FIG. 10, the normal class terminal 200 and the high function class terminal 300 may transmit data different times in a predetermined period (for example, 1 minute). For example, as shown in FIG. 10, the normal class terminal 200 may transmit data once in a predetermined period, and the high function class terminal 300 may transmit data three times in a predetermined period.

  In addition, when the normal class terminal 200 has a configuration capable of time synchronization with other terminals such as the GPS receiver 280 as shown in FIG. 11, time slots that differ for each class of terminals as shown in FIG. May be assigned. For example, as shown in FIG. 12, the normal class terminal 200 can transmit data in a time slot with an even time slot number, and the high function class terminal 300 transmits data in a time slot with an odd time slot number. You may be able to.

  In the example shown in FIG. 12, the number of time slots allocated to the normal class terminal 200 and the high function class terminal 300 is the same. However, as shown in FIG. 13, time slots may be assigned such that the number of time slots assigned to the high-function class terminal 300 is larger than the number of time slots assigned to the normal class terminal 200.

  As described above, since the data transmitted with the radio resource allocated to the high function class terminal 300 is high priority data, the amount of data transmitted with the radio resource allocated to the high function class is the normal class. This is smaller than the amount of data transmitted with the radio resource allocated to terminal 200. In addition, since the number of radio resources allocated to the high function class terminal 300 is larger than the number of radio resources allocated to the normal class terminal 200, interference in the radio resources allocated to the high function class terminal 300 is further reduced. And the data reception performance in the base station 100 is improved.

  As shown in FIG. 14, the high function class terminal 300 may transmit data to the base station 100 with higher transmission power than the normal class terminal 200, and thus the high function class terminal 300 is configured. As a result, the reception power at the base station 100 of the signal transmitted from the high function class terminal 300 increases. Since the data transmitted by the high-function class terminal 300 is high priority data, this improves the reception performance of the high priority data in the base station 100.

<2-2. About dynamic radio resource allocation>
The example in which different radio resources are statically allocated to the high function class terminal 300 and the normal class terminal 200 has been described above. However, when radio resources are statically allocated, it is difficult to cope with an increase or decrease in the number of normal class terminals 200 and high function class terminals 300 in the radio system. In the following embodiment, a method for dynamically allocating radio resources will be described.

(Example of high-function class terminal dynamically determining radio resources)
FIG. 15 is a flowchart illustrating an example of processing for dynamically determining radio resources used for the high-function class terminal 300 to transmit data. In the process shown in FIG. 15, the transmission determination unit 342 of the high-function class terminal 300 monitors the average received power of each radio resource in a predetermined period, and determines the radio resource that transmits data based on the average received power. .

  In S100, the transmission determination unit 342 monitors the received power in each radio resource (time resource or frequency resource) received by the radio communication unit 320. Here, the transmission determination unit 342 monitors the reception power for Tc time which is a predetermined time.

  Next, in S102, the transmission determining unit 342 determines whether or not the average received power in the Tc time is equal to or less than a predetermined threshold Th. If it is determined that the average received power is equal to or less than the threshold Th, the process proceeds to S104, and the transmission determination unit 342 determines to transmit data using a radio resource whose average received power is equal to or less than Th. In radio resources with low average received power, the amount of data transmitted from other terminals is small, and the level of interference and congestion is low. Therefore, the data reception performance in the base station 100 is improved by transmitting data using such radio resources.

  On the other hand, if it is determined in S102 that the average received power is greater than the threshold value Th, the transmission determination unit 342 determines that the amount of transmission from other terminals is large. Then, the process proceeds to S106, and the transmission determination unit 342 determines whether or not the elapsed time from the time when data is received from the normal class terminal 200 is equal to or less than a predetermined threshold value Tm. If it is determined in S106 that the elapsed time is equal to or shorter than Tm, the process returns to S100, and the transmission determination unit 342 repeats detecting a radio resource with a small amount of data transmitted from another terminal.

  If it is determined in S106 that the elapsed time is greater than Tm, the transmission determining unit 342 determines that the delay time will increase if it repeatedly detects a radio resource with a small amount of data transmitted from another terminal. To do. Therefore, when the elapsed time becomes longer than Tm in S106, the transmission determining unit 342 transmits the data received from the normal class terminal 200 to the base station 100 (S104). At this time, the radio resource used for transmitting data may be a radio resource allocated in advance to the high-function class terminal 300, or may be a radio resource having a relatively small average reception power.

  As described above, the high function class terminal 300 monitors the received power of each radio resource and determines the resource to be used dynamically, so that the high function class terminal 300 transfers the data to the base station 100 with high priority data. The reception performance at the base station 100 is improved. Moreover, the influence on the reception performance in the base station 100 of the data which the normal class terminal 200 is transmitting with arbitrary radio | wireless resources can be made small.

(Example in which normal class terminals and high-function class terminals dynamically determine radio resources)
In the above, the example in which the high-function class terminal 300 dynamically determines the radio resource used for transmitting data has been described. In the following, an example in which the normal class terminal 200 and the high function class terminal 300 dynamically determine radio resources used for transmitting data will be described. In the present embodiment, the radio resources used by the terminals of each class are dynamically determined according to the data transmission amount of the normal class terminal 200.

  As shown in the upper part of FIG. 16, initial values of radio resources allocated to the normal class terminal 200 and the high function class terminal 300 are set. The normal class terminal 200 according to the present embodiment dynamically determines the radio resources used by the terminals of each class according to the data transmission amount of the normal class terminal 200 as described above. The arrows shown between the upper and lower stages of FIG. 16 indicate that the normal class terminal 200 has dynamically changed the allocation of radio resources, and the time slot of time slot number 2 is the time for the high function class terminal 300. The slot is changed to a time slot for the normal class terminal 200. As a result, the amount of radio resources allocated to the normal class terminal 200 increases.

  Also, as shown in FIG. 17, the amount of radio resources allocated to the normal class terminal 200 may be reduced. In FIG. 17, the time slot of time slot number 3 is changed from the time slot for the normal class terminal 200 to the time slot for the high function class terminal 300. As a result, the amount of radio resources allocated to the normal class terminal 200 decreases. 16 and 17, the example of the time slot in which the radio resource is the time resource has been described. However, the frequency resource assignment may be dynamically changed in the same manner. When the frequency resource allocation is dynamically changed, the increase / decrease in the time slot corresponds to the increase / decrease in the frequency bandwidth.

  FIG. 18 is a block diagram illustrating an example of the configuration of the normal class terminal 200 of the present embodiment. The normal class terminal 200 of the present embodiment includes a carrier sense execution unit 290 that performs carrier sense, and further includes a radio resource determination unit 242 in the control unit 240. The normal class terminal 200 of the present embodiment performs carrier sense during data transmission. Then, the carrier sense execution unit 290 performs carrier sense, and the radio resource determination unit 242 of the normal class terminal 200 uses the number of times the carrier sense execution unit 290 determines that the data cannot be transmitted. The radio resource for broadcasting is dynamically determined.

  FIG. 19 is a block diagram showing an example of the configuration of the high function class terminal 300 of the present embodiment. The high-function class terminal 300 of this embodiment includes a radio resource determination unit 344 in the control unit 340. The radio resource determination unit 344 of the high function class terminal 300 determines a radio resource that has received data from the normal class terminal 200.

  FIG. 20 is a flowchart showing processing executed by the normal class terminal 200 of the present embodiment. In S200, the carrier sense execution unit 290 of the normal class terminal 200 performs carrier sense. In step S202, the carrier sense execution unit 290 determines whether the normal class terminal 200 can transmit data. If the carrier sense execution unit 290 determines in S202 that the normal class terminal 200 can transmit data, the process proceeds to S204.

  In S204, the carrier sense execution unit 290 determines whether or not the number of times the normal class terminal 200 is determined to be able to transmit data in the carrier sense is equal to or greater than the predetermined number Ths. When the number of times that the normal class terminal 200 is determined to be able to transmit data in S204 is less than the predetermined number Ths, the process returns to S200, and the carrier sense execution unit 290 executes carrier sense again.

  In S204, when the number of times that the normal class terminal 200 is determined to be able to transmit data is equal to or greater than the predetermined number Ths, the radio resource determination unit 242 reduces the radio resources used by the normal class terminal 200. . This is because there is a possibility that radio resources are excessively allocated to the normal class terminal 200 with respect to the data transmission amount of the normal class terminal 200.

  Next, when the carrier sense execution unit 290 determines in S202 that the normal class terminal 200 cannot transmit data, the process proceeds to S208. In S208, the carrier sense execution unit 290 determines whether or not the number of times the normal class terminal 200 is determined to be unable to transmit data in carrier sense is equal to or greater than the predetermined number Thf. If the number of times it is determined in S208 that the normal class terminal 200 cannot transmit data is equal to or less than the predetermined number Thf, the process returns to S200, and the carrier sense execution unit 290 executes carrier sense again.

  In S208, when the number of times that the normal class terminal 200 is determined to be unable to transmit data is larger than the predetermined number Thf, the radio resource determination unit 242 increases the radio resources used by the normal class terminal 200. This is because the radio resources allocated to the normal class terminal 200 may be insufficient with respect to the data transmission amount of the normal class terminal 200.

  The operation example of the normal class terminal 200 in the present embodiment has been described above. Below, the operation example of the high function class terminal 300 in this embodiment is demonstrated. The high-function class terminal 300 according to the present embodiment determines the radio resource determined to be used by the normal class terminal 200 based on the processing of FIG. FIG. 21 is a flowchart showing processing executed by the high-function class terminal 300 of this embodiment for this determination.

  First, in S300, the control unit 340 of the high-function class terminal 300 performs reception processing on all radio resources. In step S <b> 302, the radio resource determination unit 344 determines whether each of the radio resources subjected to reception processing is a radio resource allocated to the high function class terminal 300.

  If the radio resource for which the reception process has been executed in S302 is a radio resource assigned to the high function class terminal 300, the process proceeds to S304. In S304, the radio resource determination unit 344 determines whether data is received from the normal class terminal 200 using the radio resource determined to be assigned to the high function class in S302.

  If the radio resource determination unit 344 determines in S304 that data has not been received from the normal class terminal 200, the process returns to S300. If the radio resource determination unit 344 determines in S304 that data has been received from the normal class terminal 200 using the radio resource allocated to the high function class terminal 300, the process proceeds to S306. In S306, the radio resource determination unit 344 changes the radio resource that has received data from the normal class terminal 200 to the radio resource for the normal class terminal 200, and increases the radio resource used by the normal class terminal 200.

  When the radio resource for which the reception process has been executed in S302 is not the radio resource assigned to the high function class terminal 300, the process proceeds to S308. In S308, the radio resource determination unit 344 determines whether data is received from the normal class terminal 200 using the radio resource determined not to be assigned to the high function class in S302.

  If the radio resource determination unit 344 determines in S308 that data has been received from the normal class terminal 200, the process returns to S300. This is because the high-function class terminal 300 receives data from the normal class terminal 200 using the radio resources allocated to the normal class terminal 200.

  On the other hand, if the radio resource determination unit 344 determines in S308 that data has not been received from the normal class terminal 200 using the radio resources allocated to the normal class terminal 200, the process proceeds to S310. In S310, the radio resource determination unit 344 changes the radio resource that has not received data from the normal class terminal 200 to the radio resource for the high-function class terminal 300, and reduces the radio resource used by the normal class terminal 200. As described above, since the high-function class terminal 300 can determine that the normal class terminal 200 has reduced the radio resources for the normal class terminal 200, the high-function class adds the target resource to the radio resources used by the high-function class terminal 300.

  In the examples of FIGS. 20 and 21, increase / decrease of radio resources is executed once the condition is met. However, since such processing frequently causes increase / decrease of radio resources, stable performance may not be achieved in the radio system. In that case, increase / decrease of radio resources may be executed when the condition is satisfied a plurality of times.

  Thus, the radio resource is dynamically determined according to the data transmission amount of the normal class terminal 200, so that the reception performance of the data transmitted by the normal class terminal 200 in the base station 100 is maintained, and the high function class terminal The reception performance in the base station 100 of the high priority data transmitted by 300 is improved. The above-described dynamic resource allocation method is a resource allocation method that is particularly effective when the ratio of data with high priority is low in the data transmitted by the normal class terminal 200.

  In the above-described example, the normal class terminal 200 and the high function class terminal 300 have been described with respect to an example of processing for increasing the radio resources allocated to the normal class terminal 200 when the data transmission amount of the normal class terminal 200 increases. . However, the normal class terminal 200 and the high function class terminal 300 may decrease the radio resources allocated to the normal class terminal 200 when the data transmission amount of the normal class terminal 200 increases. This dynamic allocation method of radio resources is for improving the reception performance of high priority data in the base station 100 when the ratio of high priority data is high in the data transmitted by the normal class terminal 200. This is a particularly effective radio resource allocation method.

  FIG. 22 is a flowchart showing processing performed by the normal class terminal 200 in the radio resource allocation method described above. Note that S400 to S404 and S408 in FIG. 22 correspond to S200 to S204 and S208 in FIG.

  In S404, when the number of times that the normal class terminal 200 is determined to be able to transmit data is equal to or greater than the predetermined number Ths, the radio resource determination unit 242 increases the radio resources used by the normal class terminal 200. (S406). In S408, when the number of times that the normal class terminal 200 is determined to be unable to transmit data is larger than the predetermined number Thf, the radio resource determination unit 242 decreases the radio resources used by the normal class terminal 200.

  By the process of S410 described above, the high function class terminal 300 can obtain a large amount of radio resources for transmitting high priority data to the base station 100. Therefore, when the normal class terminal 200 transmits a lot of high-priority data, the high-function class terminal 300 can easily transfer the high-priority data to the base station 100, and the base station 100 receives high-priority data. Performance is improved. Note that the processing of the high-function class terminal 300 with respect to the processing of the normal class terminal 200 shown in FIG. 22 is the same as the processing shown in FIG.

(Example of sharing radio resources between normal class terminals and high-function class terminals)
In the above, the radio resource for each class of terminal is allocated to each of the normal class terminal 200 and the high function class terminal 300. Hereinafter, an example in which radio resources are shared between the normal class terminal 200 and the high function class terminal 300 will be described. In the present embodiment, it is assumed that the high-function class terminal 300 also performs carrier sense like the normal class terminal 200. Also, it is assumed that the carrier sense times executed by the normal class terminal 200 and the high function class terminal 300 with the radio resources assigned to each class are the same.

  In the present embodiment, as shown in the upper part of FIG. 23, radio resources used by the normal class terminal 200 and the high function class terminal 300 are set in advance. The processing performed by the normal class terminal 200 in the present embodiment is the same as the processing described in FIG. Therefore, when the data transmission amount of the normal class terminal 200 increases, the normal class terminal 200 increases the radio resources to be used.

  However, in this embodiment, as shown in the lower part of FIG. 23, when the data transmission amount of the normal class terminal 200 increases, the time slot of time slot number 2 is the same for both the normal class terminal 200 and the high function class terminal 300. It becomes a time slot that can be used.

  At this time, when the normal class terminal 200 transmits data in the time slot 2 shared with the high function class terminal 300, the normal class terminal 200 makes the time for performing carrier sense longer than that of the high function class terminal 300. As a result, the high-function class terminal 300 can transmit data more easily than the normal class terminal 200 in the shared radio resource. Therefore, the reception performance of the high priority data in the base station 100 is improved.

  On the other hand, when the transmission amount for transmitting high-priority data by the normal class terminal 200 increases, that is, when the transmission amount of data transmitted by the high-function class terminal 300 increases, the normal class terminal 200 is the normal class terminal 200. Reduce the radio resources used. FIG. 24 is a diagram illustrating the above-described operation. When the data transmission amount of the high function class terminal 300 increases, the time slot 1 is used by both the normal class terminal 200 and the high function class terminal 300.

  At this time, when the high function class terminal 300 transmits data in the time slot 1 shared with the normal class terminal 200, the high function class terminal 300 makes the time for performing carrier sense shorter than that of the normal class terminal 200. As a result, the priority of data transmission in the shared radio resource is higher in the high function class terminal 300 than in the normal class terminal 200. Therefore, the reception performance of the high priority data in the base station 100 is improved.

  As described above, in the radio system according to the present embodiment, radio resources used by both the normal class terminal 200 and the high function class terminal 300 may be provided. When radio resources used by both the normal class terminal 200 and the high function class terminal 300 are provided, the priority of data transmission for the class of the terminal in the shared resource is set by setting the carrier sense time. Thereby, the reception performance of the high priority data in the base station 100 is improved, and the reception performance of data transmitted by the normal class terminal 200 is also improved.

<< 3. Modification of the wireless system of the present embodiment >>
The allocation of radio resources to the normal class terminal 200 and the high function class terminal 300 has been described above. Below, the modification of the radio | wireless system of this embodiment is demonstrated.

<3-1. Example of failure notification sent to base station by high-function class terminal>
FIG. 25 is a diagram illustrating an example of a modification of the wireless system according to the present embodiment. In the wireless system shown in FIG. 25, the high function class terminal 300 transmits a failure notification to the base station 100 based on the data reception status from the normal class terminal 200. Since the reception performance at the base station 100 of the data transmitted by the high-function class terminal 300 is higher than the reception performance at the base station 100 of the data broadcast by the normal class terminal 200, the base station 100 is connected to the high-function class terminal 300. By transmitting a failure notification related to the failure of the normal class terminal 200, the failure of the normal class terminal 200 can be detected with a high probability.

  For example, when a failure such as a battery exhaustion or a failure occurs in the normal class terminal 200B, data transmission is not performed from the normal class terminal 200B as shown in FIG. At this time, the high function class terminal 300 may transmit a failure notification to the base station 100 based on not receiving data from the normal class terminal 200B for a predetermined period.

  When the regular class terminals 200A, 200B, and 200C have different data transmission intervals, the high-function class terminal 300 learns the intervals at which the normal class terminals 200A, 200B, and 200C transmit data. With this learning, the high-function class terminal 300 can predict at which timing each normal class terminal 200 transmits data, and based on the fact that data is not received at the predicted timing, the failure of the normal class terminal 200 May be determined.

  A case will be described in which the high-function class terminal 300 receives data in the order of the normal class terminal 200A, the normal class terminal 200B, and the normal class terminal 200C at the normal time. In this case, for example, when the high-function class terminal 300 receives data from the normal class terminal 200C without receiving data from the normal class terminal 200B after receiving data from the normal class terminal 200A, It may be determined that has occurred.

  FIG. 26 is a block diagram showing a configuration of the high-function class terminal 300 in the wireless system shown in FIG. The high function class terminal 300 of this embodiment includes a failure monitoring unit 346 that monitors a failure of the normal class terminal 200. As described above, the failure monitoring unit 346 determines whether a failure has occurred in the normal class terminal 200 based on the reception status of data from the normal class terminal 200.

  For example, the failure monitoring unit 346 may determine that a failure has occurred in the normal class terminal 200 based on the fact that data is not received from the normal class terminal 200 for a predetermined period as described above. Further, the failure monitoring unit 346 may determine that a failure has occurred in the normal class terminal 200 based on receiving data from each normal class terminal 200 in an order different from normal.

  By configuring the high function class terminal 300 in this way, the base station 100 can detect a failure occurring in the normal class terminal 200 with a higher probability.

<3-2. Example of sending a monitoring target terminal instruction to a high-function class terminal>
The example in which the failure notification is performed by the high function class terminal 300 has been described above. Hereinafter, an example in which the base station 100 transmits a monitoring target terminal instruction to the high function class terminal 300 will be described. In this embodiment, as shown in FIG. 27, the failure monitoring unit 346 of the high-function class terminal 300 receives the monitoring target terminal instruction transmitted from the base station 100 to preferentially monitor the reception of data. The target normal class terminal 200 is determined. In this embodiment, as shown in FIG. 28, the base station 100 may include a monitoring target terminal determining unit 182 that determines the normal class terminal 200 that is a monitoring target.

  In the example illustrated in FIG. 27, the base station 100 transmits, for example, a monitoring target terminal instruction including terminal identification information of the normal class terminal 200B to the high function class terminal 300 so that the normal class terminal 200B is set as a monitoring target. The high function class terminal 300 that has received the monitoring target terminal instruction from the base station 100 changes the operation so as to preferentially transmit and receive data transmitted from the normal class terminal 200B. For example, the high function class terminal 300 may change the operation so that data transmitted from other than the normal class terminal 200B is discarded or buffered for a predetermined time. Further, the high function class terminal 300 may change the operation so as to transmit all data received from the normal class terminal 200B to the base station 100 regardless of the type of data received from the normal class terminal 200B. . The high function class terminal 300 may periodically notify the base station 100 that data is received from the normal class terminal 200B.

  By instructing the normal class terminal 200 to be preferentially monitored to the high function class terminal 300 in this way, it is possible to construct a wireless system capable of maintenance without giving the normal class terminal 200 a complicated function. It becomes.

<3-3. Regarding an example where a base station determines a route failure of a normal class terminal>
The example in which the monitoring target terminal instruction is transmitted to the high function class terminal 300 has been described above. Hereinafter, an example in which the base station 100 determines the path failure of the normal class terminal 200 will be described. In addition, the base station 100 of this embodiment may be provided with the path | route failure determination part 184 which determines a path | route failure, as FIG. 29 shows.

  As described above, the normal class terminal 200 in the present embodiment desirably performs communication using LPWA (Low Power Wide Area) or the like capable of long-distance transmission with low power consumption. On the other hand, the high-function class terminal 300 that can relax the power restriction to some extent can perform communication using Wi-Fi or LTE (Long Term Evolution).

  Here, as shown in FIG. 30, it is assumed that a route failure occurs in the normal class terminals 200A and 200B due to construction of the building and the data broadcast from the normal class terminals 200A and 200B does not reach the base station 100. Is done. At this time, the base station 100 cannot determine whether data cannot be received due to a failure in the normal class terminal 200 or whether data cannot be received from the normal class terminal 200 due to the occurrence of a path failure.

  Therefore, the high-function class terminal 300 periodically notifies the base station 100 whether or not data can be received from the normal class terminal 200. Accordingly, the base station 100 can determine that a path failure has occurred in the normal class terminal 200 when data is not received from the normal class terminal 200 but data is received from the high function class terminal 300. Further, when data is not received from the normal class terminal 200 and data is not received from the high function class terminal 300, the base station 100 can determine that a failure has occurred in the normal class terminal 200. Note that, as described above, the high function class terminal 300 transfers data using a communication network different from that of the normal class terminal 200, thereby reducing the redundancy of data transmitted by the normal class terminal 200 and the high function class terminal 300. improves.

<< 4. Supplement >>
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the technical scope of the present disclosure is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field of the present disclosure can come up with various changes or modifications within the scope of the technical idea described in the claims. Is naturally within the technical scope of the present disclosure.

  For example, in the above-described embodiment, the terminal class is classified into two classes: the normal class terminal 200 and the high function class. However, the number of terminal class classifications is not limited to two. For example, the class of the terminal may be classified into more classes such as 5 or 6.

  Further, the high function class terminal 300 may change the type of data to be transferred based on an instruction from the base station 100. For example, the base station 100 may transmit an instruction to the high function class terminal 300 to transfer the fire occurrence information or the intrusion information. At this time, the high function class terminal 300 may not transfer other types of data such as temperature information to the base station 100.

  Further, a computer program for operating the control units 180, 240, and 340 of each terminal as described above may be provided. A storage medium storing such a program may be provided.

<< 5. Conclusion >>
As described above, the wireless system according to the present disclosure is configured such that wireless terminals are classified into a plurality of classes, and the operations of the wireless terminals differ depending on the classified classes. In the example described above, the normal class terminal 200 broadcasts the data acquired by the sensor unit 220 with identification information indicating the type of data added, and the high-function class terminal 300 receives the data from the normal class terminal 200 based on the data type. The received data is transferred to the base station 100. By configuring the normal class terminal 200 and the high function class terminal 300 in this way, the base station 100 can receive high priority data.

  In the wireless system of the present disclosure, the normal class terminal 200 and the high function class terminal 300 transmit data using different wireless resources. By configuring the normal class terminal 200 and the high function class terminal 300 in this way, interference or congestion in radio resources used by the high function class terminal 300 for data transmission is reduced, and the base station 100 can more reliably High priority data can be received.

The following configurations also belong to the technical scope of the present disclosure.
(1)
A receiving unit for receiving data broadcast from a first terminal of a first group;
A transmission determination unit that determines whether to transmit the received data to a base station based on the type of the data;
A communication terminal comprising: a transmission unit that transmits the data to the base station using a radio resource that is assigned to a second group and is different from the radio resource that is assigned to the first group.
(2)
The communication terminal according to (1), wherein the transmission unit transmits the data using a frequency different from that of the first terminal of the first group.
(3)
The communication terminal according to (1), wherein the transmission unit transmits the data using a code different from that of the first terminal of the first group.
(4)
The communication terminal according to (1), wherein the transmission unit transmits the data in a time slot different from that of the first terminal of the first group.
(5)
The transmission determination unit monitors the average received power in a predetermined period,
The transmission determination unit determines whether the type of data is a type to be transmitted to the base station,
Further, the transmission determination unit determines that the data is transmitted using the radio resource having the average received power equal to or less than the threshold when the average received power is equal to or less than the threshold. The communication terminal according to any one of the above.
(6)
A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
The radio resource determination unit increases the radio resource allocated to the first group when the data from the first terminal is received by a radio resource not allocated to the first group; The communication terminal according to any one of (1) to (5).
(7)
A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
When the data from the first terminal is received by a radio resource that is not assigned to the first group, the radio resource determination unit determines a part of the radio resource that is assigned to the first group. The communication terminal according to any one of (1) to (5), wherein the radio resource is changed to the radio resource used together with the second group.
(8)
A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
The radio resource determination unit reduces the radio resource allocated to the first group when the data from the first terminal is not received by the radio resource allocated to the first group; The communication terminal according to any one of (1) to (5).
(9)
A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
When the data from the first terminal is not received by the radio resource assigned to the first group, the radio resource determination unit determines a part of the radio resource assigned to the first group as the data. The communication terminal according to any one of (1) to (5), wherein the radio resource is changed to the radio resource used together with the second group.
(10)
The communication terminal according to any one of (1) to (9), wherein the transmission unit transmits the data with transmission power larger than that of the first terminal of the first group.
(11)
The data type is indicated by a different preamble for each data type,
The communication terminal according to any one of (1) to (10), wherein the transmission determination unit determines the type of the data based on the preamble.
(12)
The type of data is indicated by specific bits in the header of the data,
The communication terminal according to any one of (1) to (10), wherein the transmission determination unit determines the type of the data based on the specific bit.
(13)
A failure monitoring unit that monitors whether the data is received from the first terminal;
The failure monitoring unit determines that a failure has occurred in the first terminal based on the fact that the data has not been received from the first terminal for a predetermined period of time.
The transmission unit transmits a failure notification indicating that a failure has occurred in the first terminal to the base station based on the determination of the failure monitoring unit, from (1) to (12) The communication terminal according to any one of claims.
(14)
The receiving unit receives a monitoring target terminal instruction indicating the first terminal of the first group monitored by the communication terminal;
The communication terminal according to (13), wherein the failure monitoring unit determines the first terminal that is a target for monitoring the occurrence of a failure based on the monitoring target terminal instruction.
(15)
Receiving data broadcast from a first terminal of a first group;
Determining whether to transmit the received data to a base station based on the type of data;
Transmitting the data to the base station using a radio resource assigned to a second group that is different from the radio resource assigned to the first group.
(16)
Causing a processor to receive data broadcast from a first terminal of a first group;
Based on the type of data, to determine whether to transmit the received data to a base station,
A program that causes the base station to transmit the data using a radio resource that is assigned to a second group and that is different from the radio resource assigned to the first group.
(17)
A wireless system, the wireless system comprising:
A first group of first terminals that broadcast data;
A second group for determining whether to transmit the data received from the first terminal to a base station based on the type of the data broadcast from the first terminal of the first group A second terminal of
The wireless system, wherein the second terminal transmits the data to the base station using a radio resource assigned to a second group and different from a radio resource assigned to the first group.

100 Base station 120, 320 Wireless communication unit 140 Synchronization unit 160 Demodulation unit 180, 240, 340 Control unit 182 Monitored terminal determination unit 184 Path failure determination unit 200 Normal class terminal 220 Sensor unit 242, 344 Radio resource determination unit 260 Transmission unit 280 GPS reception unit 290 carrier sense execution unit 300 high-function class terminal 342 transmission determination unit 346 failure monitoring unit

Claims (17)

A receiving unit for receiving data broadcast from a first terminal of a first group;
A transmission determination unit that determines whether to transmit the received data to a base station based on the type of the data;
A communication terminal comprising: a transmission unit that transmits the data to the base station using a radio resource that is assigned to a second group and is different from the radio resource that is assigned to the first group.   The communication terminal according to claim 1, wherein the transmission unit transmits the data using a frequency different from that of the first terminal of the first group.   The communication terminal according to claim 1, wherein the transmission unit transmits the data using a code different from that of the first terminal of the first group.   The communication terminal according to claim 1, wherein the transmission unit transmits the data in a time slot different from that of the first terminal of the first group. The transmission determination unit monitors the average received power in a predetermined period,
The transmission determination unit determines whether the type of data is a type to be transmitted to the base station,
2. The transmission determination unit according to claim 1, wherein, when the average received power is equal to or less than a threshold, the transmission determination unit determines to transmit the data using the radio resource whose average received power is equal to or less than the threshold. Communication terminal. A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
The radio resource determination unit increases the radio resource allocated to the first group when the data from the first terminal is received by a radio resource not allocated to the first group; The communication terminal according to claim 1. A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
When the data from the first terminal is received by a radio resource that is not assigned to the first group, the radio resource determination unit determines a part of the radio resource that is assigned to the first group. The communication terminal according to claim 1, wherein the communication terminal changes to the radio resource used together with the second group. A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
The radio resource determination unit decreases the radio resource allocated to the first group when the data from the first terminal is not received by the radio resource allocated to the first group. Item 2. The communication terminal according to Item 1. A radio resource determination unit that determines whether the data from the first terminal is received by a radio resource assigned to the first group;
When the data from the first terminal is not received by the radio resource assigned to the first group, the radio resource determination unit determines a part of the radio resource assigned to the first group as the data. The communication terminal according to claim 1, wherein the communication terminal changes to the radio resource used together with a second group.   The communication terminal according to claim 1, wherein the transmission unit transmits the data with transmission power larger than that of the first terminal of the first group. The data type is indicated by a different preamble for each data type,
The communication terminal according to claim 1, wherein the transmission determination unit determines the type of the data based on the preamble. The type of data is indicated by specific bits in the header of the data,
The communication terminal according to claim 1, wherein the transmission determination unit determines the type of the data based on the specific bit. A failure monitoring unit that monitors whether the data is received from the first terminal;
The failure monitoring unit determines that a failure has occurred in the first terminal based on the fact that the data has not been received from the first terminal for a predetermined period of time.
The communication terminal according to claim 1, wherein the transmission unit transmits a failure notification indicating that a failure has occurred in the first terminal to the base station based on the determination of the failure monitoring unit. The receiving unit receives a monitoring target terminal instruction indicating the first terminal of the first group monitored by the communication terminal;
The communication terminal according to claim 13, wherein the failure monitoring unit determines the first terminal that is a target for monitoring the occurrence of a failure based on the monitoring target terminal instruction. Receiving data broadcast from a first terminal of a first group;
Determining whether to transmit the received data to a base station based on the type of data;
Transmitting the data to the base station using a radio resource assigned to a second group that is different from the radio resource assigned to the first group. Causing a processor to receive data broadcast from a first terminal of a first group;
Based on the type of data, to determine whether to transmit the received data to a base station,
A program that causes the base station to transmit the data using a radio resource that is assigned to a second group and that is different from the radio resource assigned to the first group. A wireless system, the wireless system comprising:
A first group of first terminals that broadcast data;
A second group for determining whether to transmit the data received from the first terminal to a base station based on the type of the data broadcast from the first terminal of the first group A second terminal of
The wireless system, wherein the second terminal transmits the data to the base station using a radio resource assigned to a second group and different from a radio resource assigned to the first group.

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