JP4842183B2 - Software defined radio terminal and terminal management device - Google Patents

Description

  The present invention relates to a software defined radio terminal including a reconfigurable circuit capable of changing a communication method.

In recent years, software wireless terminals that use a reconfigurable circuit that dynamically reconfigures hardware and switches a wireless communication system by changing control software have been studied.
Conventionally, software radio terminals have not calibrated the characteristics and performance of each circuit when reconfiguring each circuit in order to change the communication method. That is, each hardware constituting each processing unit of the software defined radio terminal has been changed in communication scheme while maintaining performance and power corresponding to all communication schemes supported by the software defined radio terminal. For this reason, the strictest conditions are always required for each hardware.

Therefore, each functional block has a characteristic table that stores characteristics such as operation parameters for each wireless system and system, and a technology that changes the performance of each processing unit by referring to the characteristic table according to the change of the communication system. It has been proposed (see, for example, Patent Document 1).
The software defined radio terminal of Patent Literature 1 includes a plurality of functional units in addition to a signal processing unit, and each functional unit includes a characteristic table that describes setting parameters and characteristics of each hardware that constitutes the software wireless terminal. In addition, an interface for adjustment is provided between the signal processing unit and each function unit, and the characteristics of the function unit can be changed and adjusted according to the contents of the characteristic table. According to this, since the characteristics of each functional unit can be adjusted, the software radio terminal always makes the adjustments when changing the communication method, so that the hardware is always required to meet the strictest conditions. lost. This made it possible to reduce the size and power of software radio terminals.

Moreover, the software defined radio terminal disclosed in Patent Document 2 is a software defined radio terminal including a built-in test module. This software defined radio terminal calibrates by optimizing the setting parameters of each circuit when changing the communication method, and corrects variations in each device and changes in characteristics depending on the temperature of the device, etc. Is possible.
JP 2002-64399 A International Publication No. 2005/079916 Pamphlet

However, the software defined radio terminal disclosed in Patent Document 1 needs to prepare a characteristic table corresponding to each system in order to support various systems. In order to prepare the characteristic table, it is necessary to measure the characteristics of each hardware for all software defined radio terminals before shipment from the factory, which increases the number of operations before shipment. In addition, it is impossible to cope with a change in the state of the software defined radio terminal after shipment and its influence, such as a change in characteristics due to a temperature change, a change in characteristics due to a secular change, and a change in power supply voltage caused by a change in remaining battery level.
The software wireless terminal disclosed in Patent Document 2 can cope with the state conversion of the wireless terminal as described above. However, since the calibration is performed every time the wireless system / system is changed, it takes a long time to switch the system. There is a problem of becoming.

  The present invention has been made in view of such a situation, simplifies the work at the time of factory shipment, and the switching time of the communication method, the frequency band, etc. is reduced in time compared to the prior art. Provide a software-defined radio terminal that performs efficiently.

In order to solve the above problems, the present invention provides a software defined radio terminal that reconfigures a reconfigurable circuit based on a set value and changes a communication method, and is obtained by a plurality of software defined radio terminals. Among the function change information including the state information indicating the terminal state of the terminal and the setting value of the reconfigurable circuit corresponding to the state information, the function change information reception for receiving the function change information corresponding to the own terminal from the terminal management device Means, a function change control means for reconfiguring the reconfigurable circuit based on the function change information received by the function change information receiving means , a calibration means for calibrating the reconfigurable circuit, and the calibration means performs calibration when a state measurement means for obtaining status information by measuring the terminal state of the terminal, settings and status information after the calibration obtained by the calibration means Characterized in that a and a transmission means for transmitting to the terminal management apparatus.

Further, according to the present invention, the function change information includes calibration method information, and the calibration unit performs calibration based on the calibration method information, performs calibration by the calibration unit, obtains a first post-calibration set value, After performing communication under the determined conditions, calibration is further performed by the calibration means to obtain a second post-calibration set value, and the first post-calibration set value, the condition, the second post-calibration set value, Is further provided with time change information transmitting means for transmitting the message to the terminal management apparatus.

Further, the present invention provides a function change information storage means for storing a plurality of state information of the terminal itself and a setting value of the reconfigurable circuit corresponding to each state information as function change information, and a state during communication of the terminal itself. A communication reconfiguration unit that operates the measurement unit to obtain state information, reads out the function change information corresponding to the state information from the function change information storage unit, and reconfigures the reconfigurable circuit based on the function change information; Is further provided.

Further, the present invention is a plurality of software radio terminal, receives the state information indicating a terminal state of a software radio terminal when the setting value after calibration software wireless terminal obtained by calibration and software radio terminal performs calibration Then, a setting result value storage means for storing the set value and the state information after calibration in association with the identification information of the calibrated communication method and the terminal identification information of the software wireless terminal, and the software wireless terminal A terminal management apparatus comprising: function change information transmitting means for reading the set value and the state information from the setting result value accumulating means and transmitting the set value and status information as function change information to the software terminal .

The present invention further includes a function change information detecting unit that receives the input of the change condition information of the terminal identification information and the state information and detects the function change information corresponding to the change condition information from the setting result value storage unit. Features.

Further, the present invention provides a linear approximation based on the state information stored in the setting result value storage unit when the function change information detection unit cannot detect the function change information corresponding to the input state information. It further comprises function change information interpolation means for calculating a value for interpolating the set value .

In addition, the present invention receives a change condition information between terminal identification information and status information together with a function change request from a software radio terminal, operates the function change information detection means to acquire function change information, and It further comprises a function change information transmitting means for transmitting.

The present invention further includes a setting average value calculating means for calculating an average value of the post-calibration setting values for each terminal identification information and state information, and the function change information generating means includes a post-calibration setting value corresponding to the identification information, It is further characterized in that a difference from the average value is calculated, and function change information is calculated based on the difference.

The present invention also provides a software defined radio terminal in which a function change information receiving means is obtained by a plurality of software defined radio terminals in a software defined radio terminal that reconfigures a reconfigurable circuit based on a set value and changes a communication method. Receiving function change information corresponding to the own terminal from the terminal management device among the function change information including the state information indicating the terminal state of the device and the setting value of the reconfigurable circuit corresponding to the state information, and the function change control means, based on the received function modification information, and reconstructing an reconfigurable circuit, calibration means, and performing the calibration of the reconfigurable circuit, the state measuring unit, when performing the calibration, obtaining a status information by measuring the terminal state of the terminal, transmission means, settings and status information after the calibration obtained by the calibration means The door is a program for executing the steps of transmitting to the terminal management apparatus.

Further, according to the present invention, the function change information includes calibration method information, the calibration unit performs calibration based on the calibration method information, and the time change information transmission unit performs calibration by the calibration unit and performs the first calibration. After obtaining a set value and performing communication under a predetermined condition, the calibration means further performs calibration to obtain a second post-calibration set value, the first post-calibration set value, the condition, The program further includes the step of transmitting the post-calibration set value of 2 to the terminal management apparatus.

Further, in the present invention, in the software defined radio terminal, the function change information storage means stores a plurality of status information of the terminal itself and a setting value of the reconfigurable circuit corresponding to each status information as function change information; The reconfiguring means during communication operates the state measuring means during communication of its own terminal to obtain state information, reads out the function change information corresponding to the state information from the function change information storage means, and based on the function change information And a step of reconfiguring the reconfigurable circuit.

  As described above, according to the present invention, the software defined radio terminal can perform the calibration process based on the result of the calibration process performed by another software defined radio terminal, and can be calibrated in a shorter time compared to the conventional case. A software-defined radio terminal capable of completing the above is provided.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a software defined radio terminal 100 that is a client terminal performs radio communication with a terminal management apparatus 200 that is a server apparatus via a base station 300. FIG. 1 shows two client terminals, software wireless terminal 100 and software wireless terminal 100_2, but any number of client terminals may be used. Although one base station 300 is shown in FIG. 1, any number of base stations 300 may be used. Further, one base station 300 may perform a plurality of communication methods, or may be installed for each communication method.

  Here, the communication method is a communication method such as CDMA (Code Division Multiple Access) or wireless LAN (Local Area Network). That is, the base station 300 may be a base station of a mobile communication network that performs communication such as a so-called mobile phone, or may have a function of a wireless LAN access point. In the description of the present embodiment, it is assumed that the client terminal such as the software defined radio terminal 100 and the base station 300 are connected wirelessly. However, the connection between the base station 300 and the terminal management apparatus 200 is a so-called connection. Internet environment such as broadband may be used, wireless or wired. The terminal management device 200 is a server that manages information related to the change of the communication method of the software defined radio terminal 100, and each functional unit may be divided into different devices so as to distribute the processing load. Multiplexing may be used to form a so-called dual system. Hereinafter, the configuration of the software defined radio terminal 100 and the terminal management apparatus 200 according to the present invention will be described in detail.

FIG. 2 is a block diagram showing a configuration of the software defined radio terminal 100 according to the embodiment of the present invention. In the present embodiment, a multiband / multimode mobile phone terminal capable of communicating with the terminal management apparatus 200 via the base station 300 is assumed as the software defined radio terminal 100.
The software defined radio terminal 100 includes a function change control unit 110, a storage unit 120, a digital signal processing unit 130, a communication unit 140, a battery sensor 150, a temperature sensor 151, a test module 160, and a reconfigurable radio circuit. 170 and an AD / DA converter 180.

  The function change control unit 110 sets a setting parameter in the communication unit 140, the reconfigurable radio circuit 170, the AD / DA conversion unit 180, and the digital signal processing unit 130, so that the communication method of the software defined radio terminal 100 Change (function change). The function change control unit 111 during communication performs the above control by setting a setting parameter to each processing unit based on information acquired from the temperature sensor 151 or the like while the software defined radio terminal 100 communicates with the outside, for example, the base station 300. Send.

  The storage unit 120 stores information necessary for changing the communication method, and includes, for example, a setting result value storage unit 121 and an identification information storage unit 122. The setting result value storage unit 121 stores setting parameters detected from the function change information received by the function change information receiving unit 131 from the terminal management apparatus 200.

  The identification information storage unit 122 stores identification information of the software defined radio terminal 100 in which the identification information storage unit 122 is provided. The identification information is, for example, model information, and the model information is information for identifying the software defined radio terminal 100 having the same internal configuration. In this case, the identification information uniquely specifies not the individual terminal but the model and type. Further, the identification information may be terminal identification information. The terminal identification information is information that uniquely identifies the individual terminal, and is a manufacturing number or a serial number. In the present embodiment example, both model information and terminal identification information are stored.

The digital signal processing unit 130 controls digital data handled by the software defined radio terminal 100. For example, the function change information receiving unit 131, the post-calibration set value transmitting unit 132, the state information transmitting unit 133, and the time change information transmitting Part 134. Hereinafter, when each transmission unit and reception unit included in the digital signal processing unit 130 receives or transmits various types of information, the communication unit 140, the reconfigurable radio circuit 170, the AD / DA conversion unit 180, and the digital signal processing unit It is assumed that data is transmitted / received via 130.
The function change information receiving unit 131 receives function change information of setting parameters and calibration data from the terminal management device 200.

  The post-calibration set value transmission unit 132 transmits the post-calibration set value optimized by the test module 160 to the terminal management apparatus 200. The state information transmission unit 133 transmits state information such as battery voltage and temperature measured by the battery sensor 150 or the temperature sensor 151 to the terminal management apparatus 200. The time change information transmission unit 134 transmits the inspection information measured during communication by the communication function change control unit 111 to the terminal management apparatus 200.

  The communication unit 140 is an antenna that communicates with the terminal management apparatus 200 via the base station 300. The battery sensor 150 detects a state of a battery (not shown) that is a power source of the software defined radio terminal 100, measures a voltage, and calculates a voltage value. The temperature sensor 151 is a sensor such as a thermistor or a radiation thermometer that is installed in the vicinity of the reconfigurable radio circuit 170 and measures the temperature of the reconfigurable radio circuit 170.

The test module 160 receives a setting parameter received from the terminal management apparatus 200 as one of functional units included in the software defined radio terminal 100 such as the reconfigurable radio circuit 170, the AD / DA conversion unit 180, and the digital signal processing unit 130. Alternatively, the entire system is set, an operation test is performed based on calibration data described later, and a calibration process for determining an optimal setting parameter is performed.
The reconfigurable radio circuit 170 is a circuit that switches a communication method and a communication frequency band by dynamically changing a circuit configuration. In the present embodiment, the circuit is reconfigured by setting parameters given from the function change control unit 110.

  The AD / DA conversion unit 180 is an electronic circuit that converts an analog electric signal into a digital electric signal or converts a digital electric signal into an analog electric signal. Communication between the software defined radio terminal 100 and the outside (base station 300 or the like) is performed by converting an electrical signal through the AD / DA conversion unit 180.

FIG. 3 is a block diagram illustrating a configuration of the terminal management apparatus 200 according to an embodiment of the present invention. The terminal management device 200 is a device that transmits information for changing the communication method to the software defined radio terminal 100 via the base station 300, and includes a storage unit 210, a control unit 220, and a communication unit 230.
The storage unit 210 stores information necessary for communication system conversion, and includes a setting parameter storage unit 211, an operation parameter storage unit 212, a calibration data storage unit 213, a post-calibration set value storage unit 215, and a state information storage unit. Part 216.

  In the operation parameter storage unit 212, for example, an operation to be set for each circuit included in the software defined radio terminal 100 classified into each model for each communication method identification information corresponding to the communication method identification information and the model information. Parameters are stored. The operation parameter is information such as the gain of the receiving amplifier, the center frequency of the bandpass filter, the passband width, the cutoff frequency, and the attenuation amount of the cutoff band.

  The setting parameter storage unit 211 stores setting parameters (setting values). This setting parameter is information in which a setting value for changing / controlling the characteristics of each circuit corresponding to each operation parameter based on information stored in the operation parameter storage unit 212 is calculated in advance. A parameter that determines a value, such as a capacitor or a variable inductor. That is, when using a capacitor that can change the overall capacitance by connecting or disconnecting capacitors arranged in parallel with a switch, information on the on / off state of the switch is a setting parameter. .

  Calibration data is stored in the calibration data storage unit 213. This calibration data is information relating to a test method for the software defined radio terminal 100 to select an optimal parameter from the setting parameters. The calibration data is, for example, information on the frequency and signal intensity for generating the test signal, and a target value for evaluating the calibration result, such as attenuation amount information in the cutoff region. Moreover, it is good also as including the information of a calibration procedure, a calibration completion criteria, etc.

  The post-calibration set value storage unit 215 is a storage unit that stores and stores post-calibration set values received from the software defined radio terminal 100 in association with the terminal identification information. For example, the post-calibration set value storage unit 215 stores communication method identification information, model identification information, terminal identification information, and setting parameters. The communication system identification information is information for identifying a communication system such as a wireless LAN or CDMA. The model identification information is identification information of models with the same hardware configuration of the software defined radio terminal 100. The terminal identification information is individual terminal identification information that uniquely identifies each software defined radio terminal 100. The setting parameter is a post-calibration setting value received from the software defined radio terminal 100 corresponding to the communication method identification information, the model identification information, and the individual terminal identification information.

  The state information storage unit 216 receives state information received from the software defined radio terminal 100 in association with the communication method identification information, model identification information, and individual terminal identification information stored in the post-calibration set value storage unit 215. It is a storage unit that accumulates. The state information is a temperature value, a battery residual pressure value, or the like measured by a sensor included in the software defined radio terminal 100.

The control unit 220 is a main control unit that performs a communication system change process, and includes, for example, a function change information transmission unit 221, a function change information detection unit 222, and a set average value calculation unit 223.
The function change information transmission unit 221 transmits information for the software defined radio terminal 100 to change the communication method to the software defined radio terminal 100. The function change information detection unit 222 detects information necessary as function change information from the storage unit 210. The setting average value calculation unit 223 reads the data in the storage unit 210 and calculates the average value of the values stored in the setting parameter storage unit 211. The function change information interpolation unit 224 reads the data in the storage unit 210, calculates a value for interpolating the set value by linear approximation, or generates a function for interpolation. As the interpolation function, for example, a commonly used interpolation function such as spline interpolation or Lagrangian interpolation may be generated. The communication unit 230 performs information communication with the base station 300.

<First Embodiment>
Next, an operation example in which the software defined radio terminal 100 according to the present invention communicates with the terminal management device 200 to change the function and introduce a new communication method will be described with reference to FIG.
The system administrator calculates the operation parameters of the reconfigurable circuit necessary for the communication method for each terminal model having the same configuration. The operation parameters include, for example, the gain of the reception amplifier, the center frequency of the bandpass filter, the passband width, the cutoff frequency, the attenuation amount of the cutoff band, and the like (step S1).

  Further, the system administrator calculates a setting parameter for each terminal model based on the operation parameter calculated above (step S2). The setting parameter is a value that is set according to the characteristics of each circuit. For example, the setting parameter is a parameter that sets a value such as a variable capacitor or a variable inductor. The system administrator may store the setting parameters in the setting parameter storage unit 211 of the storage unit 210 via an input unit (not shown) such as a keyboard provided in the terminal management apparatus 200.

For example, in the case where the circuit is an LC low-pass filter as shown in FIG. 6 using a variable capacitor, in step S1, a cutoff frequency f that is an operation parameter is specified. In step S2, the variable capacitor value C (C = (1 + √2) ÷ (4π ² Lf ² )) is calculated using the cutoff frequency f. At this time, as the value of L, for example, a value of 25 ° C. is used as a design specification. From this C value, the setting parameter of the variable capacitor is determined. That is, when a capacitor capable of changing the overall capacity by connecting or disconnecting capacitors arranged in parallel with a switch is used, information on the on / off of the switch is a setting parameter.
As the setting parameter, a plurality of candidate values may be calculated as the setting parameter in consideration of variations in temperature environment and individual differences. That is, a plurality of values may be used as the setting parameter within the above-described variation range with the calculation setting parameter target value as the center.

  Further, the system administrator calculates calibration data based on the setting parameters (step S3). The calibration data is data necessary for the software defined radio terminal 100 to perform calibration. For example, the frequency and signal strength information for generating the test signal and the attenuation in the cutoff region for evaluating the calibration result are used. There is quantity information. Note that the same setting parameter is used for the software defined radio terminal 100 of the same terminal model. For example, the system administrator stores the calibration data in the calibration data storage unit 212 of the storage unit 210 via an input unit (not shown) such as a keyboard provided in the terminal management apparatus 200.

  The operation parameters, setting parameters, and calibration data from step S1 to step S3 described above may be calculated by a system administrator, or calculated using a dedicated application or simulator operating on a computer. May be. In this case, the application or the simulator stores the calculated setting parameter in the setting parameter storage unit 211 and the calibration data storage unit in the calibration data storage unit 213.

  The system administrator specifies a mobile terminal model whose communication method is to be changed, and inputs corresponding terminal identification information to the terminal management apparatus 200. The function change information transmission unit 221 detects the setting parameter (group) corresponding to the terminal identification information from the setting parameter storage unit 211 and the calibration data from the calibration data storage unit 213, and serves as function change information via the communication unit 230. The function change information is transmitted to the software defined radio terminal 100 (step S4). Here, the configuration may be such that the software defined radio terminal 100 transmits a method change request to the terminal management apparatus 200, and the terminal management apparatus 200 transmits function change information in response thereto.

  The function change information receiving unit 131 of the software defined radio terminal 100 receives function change information. Then, for example, the test module 160 of the function change control unit 110 detects the setting parameter from the received function change information, sets the parameter to the reconfigurable radio circuit 170, and the content of the calibration data detected from the received function change information. Perform calibration process according to

  For example, the test module 160 reads a test signal from the calibration data, and transmits this test signal to the reconfigurable wireless circuit 170 via the AD / DA conversion unit 180. The reconfigurable wireless circuit 170 returns a test signal to the test module 160 via the AD / DA conversion unit 180. Then, the test module 160 compares the transmitted test signal with the returned test signal to determine whether there is an error in the signal. If the test module 160 has received a plurality of setting parameters, the test module 160 repeats the transmission / reception of the test signal and the comparison determination from the setting parameter setting for each of the plurality of setting parameters. Then, the setting parameter that received the test signal with the least error is selected as the post-calibration setting value.

Further, as an example of the calibration procedure, the following procedure can be considered.
First, the test module 160 sets initial values of setting parameters for each circuit. For example, in the case of an LC low-pass filter, the switch of the variable capacitor is connected as indicated by the initial value of the setting parameter. Next, the characteristics of the circuit are measured. For example, in the case of an LC low-pass filter, an unmodulated signal is input to the filter, and the attenuation at the filter output is measured. Next, change the setting parameter and re-measure the characteristics. For example, in the case of the LC low-pass filter, the characteristic is measured by decreasing or increasing the value of the variable capacitor. Then, a change in characteristics due to the setting parameter change is determined. For example, in the case of the LC low-pass filter, the characteristics of the decreased value, the initial value, and the increased value are compared, and the direction in which the setting parameter is changed (decrease, not change, increase) is determined. The test module 160 repeats changing the setting parameters and determining the characteristics of the circuit until an optimum setting parameter is found.

  Further, when the test module 160 performs the calibration process, at this time, the state information transmission unit 133 operates the battery sensor 150 and the temperature sensor 151 to detect the voltage value and the temperature value, respectively (step S5). . When the calibration by the test module 160 is finished and the post-calibration set value of each circuit is determined, the function change control unit 110 sets the post-calibration set value in each function unit and switches the communication method (step S6). .

  The post-calibration set value transmission unit 132 transmits the post-calibration set value calculated in step S5 and the identification information detected from the identification information storage unit 122 to the terminal management apparatus 200. Furthermore, the state information transmission unit 133 transmits the state information of the voltage value and the temperature value calculated in step S5 and the identification information detected from the identification information storage unit 122 to the terminal management device 200 (step S7). At this time, the post-calibration set value transmission unit 132 and the state information transmission unit 133 may be configured as a single transmission unit, and the post-calibration set value, the voltage value, and the temperature value may be transmitted together. Here, the switching order of the communication method in step S6 and the operation order of the information transmission process in step S7 may be reversed, that is, step S6 may be performed after step S7.

  Then, the terminal management apparatus 200 stores the post-calibration set value received from the software defined radio terminal 100 in the post-calibration set value storage unit 215 using the terminal identification information as a main key, and stores it. In addition, the terminal management apparatus 200 stores the state information received from the software defined radio terminal 100 in the state information storage unit 216 using the terminal identification information as a main key and stores the state information. (Step S8).

<Second Embodiment>
Next, referring to FIG. 5, based on the information accumulated in the post-calibration set value accumulation unit 215 and the state information accumulation unit 216 of the terminal management apparatus 200 according to the first embodiment, the function is applied to the software defined radio terminal 100. An example of an operation for transmitting change information will be described.
When changing the communication method, for example, the temperature sensor 151 of the software defined radio terminal 100 measures the temperature and calculates the temperature value as the state information (step S11), The terminal identification information of the terminal and the state information are transmitted to the terminal management apparatus 200 as setting parameter detection conditions (step S12).

The terminal management apparatus 200 receives the setting parameter detection condition. The function change information detection unit 222 detects setting parameters that match the received setting parameter detection condition from the information stored in the post-calibration setting value storage unit 215 and the state information storage unit 216 (steps S13 and S14). .
Here, when the function change information detection unit 222 cannot detect information that matches the setting parameter detection condition from the post-calibration set value storage unit 215, the function change information interpolation unit 224 calculates the setting parameter by the interpolation method. Also good. For example, the setting parameter detection condition is that the communication system identification information is “A”, the terminal identification information (here, it is model identification information) is “B”, and the terminal state information (here, temperature information) Is assumed to be “24”. The status information storage unit 216 stores “23”, “25”, and “27” as the terminal status information corresponding to the information whose communication method identification information is “A” and the terminal identification information is “B”. It is assumed that setting parameters corresponding to these are stored in the post-calibration set value storage unit 215.

  At this time, since the setting parameter for the temperature “24” is not stored in the state information storage unit 216, the function change information detection unit 222 sets the setting parameter that matches the setting parameter detection condition to the state information storage unit 216. 216 and the post-calibration set value storage unit 215 cannot be detected. In such a case, the setting parameter for the temperature value “24” may be calculated by the interpolation method from the setting parameter of the information whose temperature value is “23” (degrees), “25”, “26”. .

  In addition, the setting average value calculation unit 223 may add a difference from the average value to the setting parameter detected or calculated as described above as the setting parameter. For example, if the post-calibration set value storage unit 215 stores a plurality of pieces of information in which the communication method identification information and the model identification information are the same and the terminal identification information and the temperature value information are different, those information are stored. Is calculated for each temperature value information. Then, for each temperature value information, the difference between the average value and the setting parameter (post-calibration setting value) of the identification information of the terminal that has transmitted the setting parameter detection condition is calculated. The set average value calculation unit 223 adds this difference to the detected or calculated setting parameter (subtracts if the difference is negative) and calculates it as a setting parameter.

  At this time, the function change information detecting unit 222 cannot detect a setting parameter that matches the received setting parameter detection condition from the post-calibration setting value accumulating unit 215, and the setting parameter exceeding the preset number is the post-calibration setting value. If the data is not stored in the storage unit 215 and the status information storage unit 216, the sample parameter is insufficient, and it is assumed that the reliability of calculating the interpolation value or the average value is low. It is good also as a calibration which acquires the setting parameter and calibration data corresponding to terminal identification information from the memory | storage part 211 and the calibration data memory | storage part 213 (step S15).

  That is, the post-calibration set value storage unit 215 and the state information storage unit 216 store a set value determined by each software radio terminal actually performing calibration and a sample actual value of the state information. The function change information detection unit 222 may detect one set parameter value when it is determined that the sample performance value is accumulated beyond a threshold set in advance by the system administrator. In addition, when it is determined that the accumulation of sample performance values does not exceed the threshold and is not sufficient, a plurality of setting parameters having variations may be detected.

Then, the function change information detection unit 222 transmits the detected or calculated setting parameter to the software defined radio terminal 100 (Step S16).
The function change control unit 110 of the software defined radio terminal 100 sets the setting parameter received from the terminal management apparatus 200 in each circuit and switches the communication method (step S17). In the present embodiment, when there is only one setting parameter received by the software defined radio terminal 100, the calibration need not be performed again.

<Third Embodiment>
Next, an operation example in which the software defined radio terminal 100 receives a plurality of setting parameters corresponding to the state information of a plurality of terminals from the terminal management apparatus 200 and changes the setting values in real time during communication will be described.

  The temperature of each circuit included in the software defined radio terminal 100 changes during communication due to self-heating or heat radiation from other heat sources. The battery voltage also changes during communication. In order to cope with these state changes, in the present embodiment example, during the communication, the state of the wireless terminal such as the temperature and the battery voltage is measured, and these changes are caused by changing the setting parameters according to the state. Also, the set value is changed in real time so as to operate in an optimum calibration state.

  That is, in step S16 in the second embodiment, the function change information detection unit 222 is stored from the post-calibration set value storage unit 215 and the state information storage unit 216 in correspondence with the model identification information for changing the communication method. The setting parameter corresponding to the plurality of terminal state information (here, temperature information) is detected as function change information, and the function change information transmitting unit 221 transmits the detected parameter. Then, the function change information receiving unit 131 of the software defined radio terminal 100 stores the received function change information in the setting result value storage unit 121.

  For example, when communication unit 140 starts communication with base station 300, communication unit 140 notifies communication function change control unit 111 that communication has started. When the communication function change control unit 111 receives the communication start notification, for example, the function change control unit 111 operates the temperature sensor 151 at a predetermined time interval, and sets a setting parameter corresponding to the acquired temperature information. And set in the reconfigurable radio circuit 170.

Further, the function change information interpolation unit 224 of the terminal management apparatus 200 may generate an interpolation function and transmit this function to the software defined radio terminal 100 as function change information. In this case, the function change control unit 111 during communication calculates an optimum setting parameter from the state information using the interpolation function and sets it in each circuit.
As described above, by setting parameters corresponding to a plurality of states before the start of communication to the software defined radio terminal 100, the parameter may be set in conjunction with a change in environment during communication.

<Fourth Embodiment>
In the third embodiment, the function change information detection unit 222 detects the setting parameters corresponding to the plurality of state information corresponding to the model identification information as the function change information. Static detection such as detecting a setting parameter corresponding to the state information or detecting a setting parameter corresponding to the state information in a predetermined range of temperature, for example, “20” degree to “35” degree Depending on the method. Therefore, for each model, the software wireless terminal 100 measures state information before and after communication for a predetermined time and transmits the measurement information to the terminal management apparatus 200, so that the terminal management apparatus 200 generates prediction data due to time changes. Make it possible.

  For example, in the second embodiment, after switching the communication method in step S17, the time change information transmission unit 134 operates the temperature sensor 151 to acquire pre-communication temperature information. And it communicates with the terminal management apparatus 200 as a communication test of a communication system switch. This communication test may be performed for a predetermined time, for example, 1 minute, or may be performed as a communication test condition that transmission / reception of predetermined test data is completed.

  The time change information transmission unit 134 performs communication according to the communication test conditions as described above, and after the communication is completed, further operates the temperature sensor 151 to acquire post-communication temperature information. Then, the time change information transmission unit 134 transmits the pre-communication temperature information, the post-communication temperature information, and the communication test condition information to the terminal management apparatus 200.

  Upon receiving the pre-communication temperature information, the post-communication temperature information, and the communication test condition information, the terminal management apparatus 200 stores the time change information storage unit (not shown). In the third embodiment, when the function change information detection unit 222 detects the function change information in step S16, the range of state information to be detected is determined by referring to the information stored in the time change information transmission unit. It is good also as composition to do. For example, in the function change information detection unit 222, the communication test information is “5-minute communication”, the pre-communication temperature information is “25”, the post-communication temperature information is “28”, and the communication test information is “ It is assumed that “communication for 20 minutes” is detected, and the temperature information before communication is “25” and the temperature information after communication is “28”. In this case, the function change information detection unit 222 assumes that the temperature is unlikely to exceed “28”, and the state information is “25”, “from the post-calibration set value storage unit 215 and the state information storage unit 216. Only information that is any one of “26”, “27”, and “28” may be detected and processed as function change information.

Further, the software defined radio terminal 100 performs a calibration process even when communication is not being performed, and transmits the identification information of the terminal itself and the post-calibration set value to the terminal management apparatus 200. It may be reflected in the function change information.
Thus, according to the fourth embodiment, by acquiring in advance information on how the state of the software defined radio terminal 100 changes during communication and storing it in the terminal management apparatus 200, It is possible to reduce the amount of setting parameters passed to the software defined radio terminal 100.

  As described above, in each embodiment from the first embodiment to the fourth embodiment, the software defined radio terminal 100 transmits post-calibration setting values, state information, and the like to the terminal management apparatus 200, and based on these, the terminal management apparatus The operation example in which the function change information 200 is generated and transmitted to the software defined radio terminal 100 has been described. However, the use of the information stored in the terminal management device 200 is not limited to this. For example, each information transmitted and stored in the terminal management device 200 is provided with a terminal state browsing function in the terminal management device 200. Information such as post-calibration set value storage unit 215 and status information storage unit 216 may be displayed on a display unit such as a display, and the information may be used as a performance test value for grasping the aging degradation state of a terminal or formulating a new communication method. good.

As described above, according to the present invention, the software defined radio terminal 100 performs calibration, collects the results in the software defined radio terminal 100, and creates a database, thereby enabling the characteristics of the software defined radio terminal 100 to be measured. Therefore, it is not necessary to measure the characteristics of all wireless terminals before shipment from the factory, and work before shipment from the factory can be reduced.
Further, it is considered that the accuracy of the function change information to be provided increases as the information collected in the terminal management apparatus 200 increases, and the calibration processing time is shortened, and the time required for changing the communication method can be shortened. Further, after sufficient data has been collected, it is not necessary to calibrate the software defined radio terminal 100 when changing the communication method.

The program for realizing the function of the processing unit in the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed to change the communication method. May be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

1 is a diagram illustrating a system configuration according to an exemplary embodiment of the present invention. It is a figure which shows the structure of the software defined radio terminal according to the embodiment of the present invention. It is a figure which shows the structure of the terminal management apparatus by the example embodiment of this invention. It is a flowchart which shows the operation example by the 1st Embodiment of this invention. It is a flowchart which shows the operation example by the 2nd Embodiment of this invention. It is a circuit diagram which shows the example of LC low-pass filter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Software radio terminal 110 Function change control part 111 Communication function change control part 120 Storage part 121 Setting performance value storage part 122 Identification information storage part 130 Digital signal processing part 131 Function change information reception part 132 Post-calibration setting value transmission part 133 State Information transmission unit 134 Time change information transmission unit 140 Communication unit 150 Battery sensor 151 Temperature sensor 160 Test module 170 Reconfigurable radio circuit 171 Temperature sensor 180 AD / DA conversion unit 200 Terminal management device 210 Storage unit 211 Setting parameter storage unit 212 Operation Parameter storage unit 213 Calibration data storage unit 215 Post-calibration set value storage unit 216 Status information storage unit 220 Control unit 221 Function change information transmission unit 222 Function change information detection unit 223 Set average value calculation unit 224 Function change Broadcast interpolating unit 230 communication unit 300 base station

Claims (11)

A software defined radio terminal that reconfigures a reconfigurable circuit based on a set value and changes a communication method.
Corresponding to the own terminal among the function change information including the state information indicating the terminal state of the software defined wireless terminal and the reconfigurable circuit setting value corresponding to the state information obtained by the plurality of software defined wireless terminals Function change information receiving means for receiving function change information to be received from the terminal management device;
Function change control means for reconfiguring the reconfigurable circuit based on the function change information received by the function change information receiving means;
Calibration means for calibrating the reconfigurable circuit;
When the calibration unit performs calibration, a state measurement unit that measures the terminal state of the terminal and obtains state information;
Transmitting means for transmitting the set value after the calibration obtained and said state information in said calibration means to said terminal management apparatus,
A software defined radio terminal comprising: The function change information includes calibration method information,
The calibration means performs calibration based on the calibration method information,
Calibration is performed by the calibration means to obtain a first post-calibration set value, communication is performed under a predetermined condition, and further calibration is performed by the calibration means to obtain a second post-calibration set value. the a first calibration after set value, and the condition, wherein a second calibration after set value to claim 1, further comprising a time change information transmitting means for transmitting to said terminal management apparatus Software wireless terminal. Function change information storage means for storing, as function change information, a plurality of state information of the terminal itself and setting values of the reconfigurable circuit corresponding to the respective state information;
During the communication of the terminal itself, the state measuring unit is operated to obtain state information, the function change information corresponding to the state information is read from the function change information storage unit, and the reconfiguration is performed based on the function change information. software radio terminal according to claim 1 or claim 2, characterized by further comprising a reconstruction unit during communication reconfigure the reconfigurable circuit. A plurality of software-defined radio terminal, receives the state information setting value after calibration the software radio terminal obtained by calibration with the software radio terminal indicating the terminal status of the software defined radio terminal when performing calibration, the Setting result value storage means for storing the set value after calibration and the state information in association with the identification information of the communication method that performed the calibration and the terminal identification information of the software defined radio terminal ;
Function change information transmitting means for reading the setting value and the status information corresponding to the software radio terminal from the setting result value accumulation means and transmitting the function change information to the software terminal;
A terminal management apparatus comprising: A function change information detecting unit that receives input of change condition information of terminal identification information and status information, and detects function change information corresponding to the change condition information from the set performance value accumulation unit. Item 5. The terminal management device according to Item 4 . When the function change information detection unit cannot detect the function change information corresponding to the input state information, the function change information detection unit is set by linear approximation based on the state information stored in the setting result value storage unit. The terminal management apparatus according to claim 5 , further comprising: function change information interpolation means for calculating a value for interpolating the value . A function change that receives the change condition information of the terminal identification information and the status information together with the function change request from the software defined radio terminal, operates the function change information detection unit to acquire the function change information, and transmits the function change information to the software defined radio terminal The terminal management apparatus according to claim 6 , further comprising information transmission means. A setting average value calculating means for calculating an average value of the setting values after calibration for each of the terminal identification information and the state information;
The function modification information generation means calculates a difference between the average value and the setting value after the calibration corresponding to the identification information, in claim 7, further characterized by calculating the function modification information based on the difference The terminal management apparatus as described. Reconfigure the reconfigurable circuit based on the set value and change the communication method to the software defined radio terminal.
Function change information including a state information indicating a terminal state of the software defined radio terminal and a setting value of the reconfigurable circuit corresponding to the state information, obtained by the function change information receiving unit by the plurality of software defined radio terminals Receiving the function change information corresponding to the own terminal from the terminal management device,
A function change control means reconfiguring the reconfigurable circuit based on the received function change information;
Calibration means, and performing a calibration of the reconfigurable circuit,
A state measuring means, when performing calibration, measuring the terminal state of its own terminal to obtain state information;
Program for transmission means to execute a step of transmitting the setting value after calibration obtained and said state information in said calibration means to said terminal management apparatus. The function change information includes calibration method information,
The calibration means performs calibration based on the calibration method information,
Time change information transmission means,
Calibration is performed by the calibration means to obtain a first post-calibration set value, communication is performed under a predetermined condition, and further calibration is performed by the calibration means to obtain a second post-calibration set value. The program according to claim 9 , further comprising: transmitting the first post-calibration set value, the condition, and the second post-calibration set value to the terminal management apparatus. Software radio terminal
The function change information storage means stores a plurality of status information of the terminal itself and the setting value of the reconfigurable circuit corresponding to each status information as function change information;
The communication reconfiguration means operates the state measurement means during communication of the terminal to obtain state information, reads the function change information corresponding to the state information from the function change information storage means, The program according to claim 9 , further comprising: reconfiguring the reconfigurable circuit based on change information.

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