JP5652834B2 - Mobile phone device, communication system, communication environment display method used therefor, and program thereof - Google Patents

Description

  The present invention relates to a mobile phone device, a communication system, a communication environment display method used therefor, and a program therefor, and more particularly to a communication system such as LTE (Long Term Evolution) in which a frequency band allocated to a terminal changes dynamically.

  LTE is a new communication standard for mobile phones. The service is expected to start around the world from around 2010, and 3GPP Release.3 is a standardization organization, 3GPP (3rd Generation Partnership Project). Standardization work is underway as 8.

  During LTE communication, the frequency band allocated to the terminal by OFDMA (Orthogonal Frequency Division Multiplexing Access), which is a multiple access method in the downlink transmission direction, is one of all available downlink frequency bands. There may be only part. The frequency band allocated to the terminal is dynamically allocated every 1 ms by the LTE base station (eNodeB), and the allocation may always change during the LTE communication connection. Also in the uplink transmission direction, the frequency band assigned similarly changes.

  A cellular phone of a 3G (W-CDMA: Wideband Code Division Multiple Access) system related to the present invention has a function of displaying an antenna bar icon as a display that allows the user to grasp the good / bad communication environment.

  However, this often uses RSCP (Received Signal Code Power) or Ec / No (Received energy per chip divided by the power in the band) obtained based on downlink received power (for example, non-patented). Reference 1).

"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical layer-Measurement (FDD) (Release 9)".

  However, in the case of a communication system such as LTE in which the frequency band allocation changes during communication, the frequency band allocated to the terminal is proportional to the communication speed (when other conditions are the same). Even if the received power is good, the communication speed does not increase if the allocated frequency band is narrow.

  That is, in the case of the communication system as described above, the received power alone is not suitable as an index for the communication environment. Therefore, another index for determining whether the communication environment is good or bad in a communication system such as LTE is required.

  In addition, since the frequency bandwidth that can be used for each operator (operator) is different, the above index is “currently, terminal for all frequency bands that can be used by the operator corresponding to the wireless network in which the terminal is located”. It is necessary to judge by the ratio of “frequency band allocated to”. For example, if there is an operator who can use the 20 MHz frequency band and an operator who can use only 3 MHz, as described above, even if the frequency assigned to the terminal is the same 3 MHz, the former communication environment is “bad”. “The latter communication environment needs to be judged as“ good ”.

  Furthermore, until now, the antenna bar is always displayed based on the received power of the downlink. However, in the case of a system in which frequency bands are allocated separately for the uplink and the downlink, such as LTE, information on the downlink is always used. It is problematic to judge whether the communication environment is good or bad based on the above.

  For example, when uploading a moving image or the like to a WEB page, the amount of data flowing in the uplink is large, but the amount of data flowing in the downlink is small. In such a case, the frequency band allocated to the downlink may be narrower than that of the uplink. Therefore, whether the communication environment is good or bad is determined based on the frequency band allocated to the uplink instead of the downlink. Otherwise, accurate judgment cannot be made.

  A characteristic of LTE is that the frequency band assigned to the terminal always changes. In the case of such a communication system, it is impossible to determine whether the communication environment is good or bad only with the reception power of the terminal used conventionally.

  Therefore, an object of the present invention is to solve the above-described problems, and in a communication system in which the frequency band allocated to a terminal constantly changes, a mobile phone device, a communication system, and a communication system that can determine whether the correct communication environment is good or bad It is an object to provide a communication environment display method and program used for the same.

A mobile phone device according to the present invention is a mobile phone device used in a communication system for performing communication in which a frequency band assigned to the mobile phone device dynamically changes,
It is characterized in that the state of the communication environment is displayed using the ratio between the frequency band allocated to the own apparatus and the total frequency band of uplink or downlink.

  A communication system according to the present invention includes the mobile phone device described above.

A communication environment display method according to the present invention is a communication environment display method used for the mobile phone device in a system that performs communication in which a frequency band assigned to the mobile phone device dynamically changes.
The mobile phone device executes a step of displaying a state of a communication environment using a ratio between a frequency band allocated to the mobile phone device and a total frequency band of uplink or downlink.

A program according to the present invention is a program that is executed by a central processing unit in a mobile phone device in a system that performs communication in which a frequency band assigned to the mobile phone device changes dynamically,
It includes a process of displaying the state of the communication environment using the ratio between the frequency band allocated to the mobile phone device and the total frequency band of uplink or downlink.

  By adopting the configuration and operation as described above, the present invention provides an effect that it is possible to determine whether the communication environment is good or bad even in a communication system in which the frequency band assigned to the terminal constantly changes.

It is a block diagram which shows the structural example of the mobile telephone apparatus by the 1st Embodiment of this invention. It is a figure which shows a response | compatibility with the combination of (1) band ratio and (2) received power, and the number of the antenna bars which should be displayed. It is a flowchart which shows the process of the communication environment display method by the 1st Embodiment of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings. First, an outline of a communication system according to the present invention will be described. The communication system according to the present invention is a communication system in which a frequency band allocated (available) to a terminal is variable, such as a mobile phone system of 3.9G [hereinafter referred to as LTE (Long Term Evolution)], and the like. The display is made so that the user of the terminal can grasp the good / bad of the current communication environment.

  The present invention is characterized in that the wider the frequency band allocated to the terminal, the higher the communication speed, and this is used for determining whether the communication environment is good or bad.

  Here, the first feature of the present invention is to use the ratio of the band currently allocated to the terminal with respect to all usable frequency bands as an index for determining whether the communication environment is good or bad.

  For example, if the entire frequency band of a certain operator (operator) is 3 MHz and the band allocated to the terminal is 3 MHz, it is determined as “good”. Further, if the total frequency band of a certain operator is 20 MHz and the band allocated to the terminal is 3 MHz, it is determined as “bad”. That is, even when the same 3 MHz frequency band is allocated to the terminal, it is possible to determine whether the terminal is good or bad based on the ratio to the entire band.

  In the present invention, the second feature is that the formula for obtaining the index is properly used as follows.

-If the amount of data currently flowing in the uplink (terminal → base station direction)> the amount of data currently flowing in the downlink (base station → terminal direction),
“Frequency band allocated to uplink (transmission from terminal)” ÷ “All frequency bands available for uplink” (A)
Is used.

-If the amount of data currently flowing in the uplink (terminal → base station direction) <the amount of data currently flowing in the downlink (base station → terminal direction),
“Frequency band allocated to downlink (transmission from base station)” ÷ “All frequency bands that can be used in downlink” (B)
Is used.

  When the amount of data currently flowing in the uplink (terminal → base station direction) ≈the amount of data currently flowing in the downlink (base station → terminal direction), the above formulas (A) and (B) Use the average of.

  Finally, the index obtained above and the received power used in the conventional 3G (W-CDMA: Wideband Code Division Multiple Access) system [RSRP (Reference Signal Received Power for LTE: 3GPP (3rd Generation Partnership)). Project) TS36.214 V9.0.0 (2009-12) (described in Non-Patent Document 2)] is used to display the communication environment.

  Below, although the example in the case of a communication system like LTE is described, even if it is another system, the method similar to the following is applicable.

  During LTE communication, as shown in FIG. 2, the combination of (1) band ratio and (2) received power and the number of antenna bars to be displayed are defined in advance. (2) Obtain the number of antenna bars to be displayed from the received power and display it. For example, when (1) the band ratio is 50% and (2) the received power is 70 dBm, this corresponds to “★” shown in FIG. 2 and the number of antenna bars to be displayed is two.

  (1) The bandwidth ratio is obtained as follows. The following processing will be described later.

(C) Uplink bandwidth ratio is
“(1) Uplink frequency band currently allocated to terminal” ÷ “(2) All uplink frequency bands that can be used by the operator corresponding to the wireless network in which the terminal is located”
It is calculated by the following formula. For example, if (1) the frequency band ratio of the uplink allocated to the terminal is 50, and (2) the total uplink frequency band usable by the operator corresponding to the wireless network in which the terminal is located is 100, the above The index of “50 ÷ 100 = 50%” is obtained.

(D) Downlink bandwidth ratio is
“Current downlink frequency band allocated to the terminal” ÷ “All downlink frequency bands available to the operator corresponding to the wireless network in which the terminal is located”
It is calculated by the following formula. Here, the amount of data flowing in the currently communicating uplink is compared with the amount of data flowing in the downlink, and the average of (C), (D), (C), and (D) is compared under the following conditions: Is determined as a band ratio to be displayed.

  When the amount of data currently flowing in the uplink (terminal → base station direction)> the amount of data currently flowing in the downlink (base station → terminal direction), (C) is used.

  If the amount of data currently flowing in the uplink (terminal → base station direction) <the amount of data currently flowing in the downlink (base station → terminal direction), (D) is used.

  When the amount of data currently flowing in the uplink (terminal → base station direction) ≈the amount of data currently flowing in the downlink (base station → terminal direction), the average of the above (C) and (D) Is used.

  Although it is possible to separately display (C) and (D) without switching, in recent years, the number of icons displayed on the screen of the terminal has increased, and 1 is not divided. The method of grouping them together (for example, switching and displaying as in the present invention) is important.

  (2) Received power is downlink received power measured at the terminal. For example, in the case of LTE, RSRP is used.

  As described above, in the communication system according to the present invention, attention is paid to the fact that the wider the frequency band allocated to the terminal, the higher the communication speed, and this is used to determine whether the communication environment is good or bad. Even in a communication system in which the bandwidth constantly changes, it is possible to obtain an effect that it is possible to determine whether the correct communication environment is good or bad.

  FIG. 1 is a block diagram showing a configuration example of a mobile phone device according to the first embodiment of the present invention. In FIG. 1, the mobile phone device 1 according to the first exemplary embodiment of the present invention includes an antenna 10, a control unit 11 [for example, a CPU (Central Processing Unit)], a radio unit 12, and a received power measurement unit 13. The main body display unit 14 and the main body storage unit 15 are configured.

  The control unit 11 includes an all frequency band calculation unit 111, a terminal allocated frequency band calculation unit 112, a use band ratio determination unit 113, and a display icon determination unit 114.

  The total frequency band calculation unit 111 obtains all the frequency bands that can be used by the operator (operator) for each of the uplink and the downlink. The terminal allocated frequency band calculation unit 112 obtains the frequency band currently allocated to the terminal from the signal received by the radio unit 12 for each of the uplink and the downlink.

  The used bandwidth ratio determination unit 113 compares the amount of data flowing in the currently communicating uplink with the amount of data flowing in the downlink, and averages the above (C), (D), (C), and (D) Which of these is to be the band ratio to be displayed is determined. The display icon determination unit 114 determines and displays an icon to be displayed on the main body display unit 14 from the band ratio and the received power measured by the received power measurement unit 12.

  FIG. 2 is a diagram showing the correspondence between the combination of (1) band ratio and (2) received power and the number of antenna bars to be displayed. In FIG. 2, the combination of (1) band ratio and (2) received power and the number of antenna bars to be displayed are defined in advance and stored in the main body storage unit 15.

  The control unit 11 refers to the correspondence table stored in the main body storage unit 15, obtains the number of antenna bars to be displayed from (1) band ratio and (2) received power, and displays it. For example, when (1) the band ratio is 50% and (2) the received power is 70 dBm, this corresponds to “★” shown in FIG. 2 and the number of antenna bars to be displayed is two.

  FIG. 3 is a flowchart showing processing of the communication environment display method according to the first embodiment of the present invention. The communication environment display method according to the first embodiment of the present invention will be described with reference to FIGS. Note that the processing operation shown in FIG. 3 is realized by the control unit 11 executing a program stored in the main body storage unit 15.

  The control unit 11 (total frequency band calculation unit 111) of the mobile phone device 1 determines all frequency bands that can be used by an operator (operator) corresponding to the wireless network in which the terminal is located, from the signal received by the wireless unit 12. Each of the uplink and downlink is obtained (step S1 in FIG. 3) and stored in the main body storage unit 15.

  In the case of LTE, for example, in the case of LTE, the uplink total frequency band (a) is broadcast information {System Information Block Type 2 Ul (Uplink) -Bandwidth [3GPP TS36.331 V9.0.0 (2009- 09) The number of RBs (Resource Blocks) (any one of 6, 15, 25, 50, 75, and 100) notified in “6.3.1 System information blocks” (non-patent document 3)]} The entire frequency band of the uplink that can be used by the operator.

  In addition, since the Ul-Bandwidth may be included in a downlink message (RRC (Radio Resource Control) Connection Reconfiguration message, etc.), the information in the main body storage unit 15 is updated with the latest received Ul-Bandwidth [ 3GPP TS36.331 V9.0.0 (2009-09) "6.2.2 Message definitions" (Non-Patent Document 4) 3GPP TS36.331 V9.0.0 (2009-09) "6.3.4" Mobility control information elements "(non-patent document 5)].

  Further, when the Ul-Bandwidth is not received, the total frequency band of the uplink is set to a value equal to the total frequency band of the downlink. Here, RB is a set of 15 KHz sub-channels and is a basic unit of transmission having a band of 180 kHz. The Uplink RB is described in 3GPP TS 36.211 V9.0.0 (2009-12) “5.2.3 Resource blocks” (Non-patent Document 6), and the Downlink RB is described in 3GPP TS 36.211 V9. 0.0 (2009-12) “6.2.3 Resource blocks” (Non-Patent Document 7).

  For example, in the case of LTE, the downlink frequency band (b) is broadcast information {Master Information Block Dl (Downlink) -Bandwidth [3GPP TS36.331 V9.0.0 (2009-09) from the LTE base station (eNodeB). ) “6.2.2 Message definitions” (Non-Patent Document 4)]} The number of RBs (any one of 6, 15, 25, 50, 75, and 100) notified by the operator can be used. The entire frequency band of the link.

  Also, Dl-Bandwidth is included in the downlink message {RRC Connection Reconfiguration message etc. transmitted from the base station to the terminal, so the information in the main body storage unit 15 is updated with the latest received Dl-Bandwidth. [3GPP TS36.331 V9.0.0 (2009-09) "6.2.2 Message definitions" (Non-Patent Document 4), 3GPP TS36.331 V9.0.0 (2009-09) "6.3 .4 Mobility control information elements "(Non-Patent Document 5)].

  The control unit 11 (terminal allocation frequency band calculation unit 112) of the mobile phone device 1 obtains the frequency band currently allocated to the terminal from the signal received by the radio unit 12, respectively for the uplink and the downlink (step in FIG. 3). S2), and stored in the main body storage unit 15.

  For example, in the case of LTE, the frequency band (c) currently allocated to the uplink of the terminal is an uplink RB that can be used by the terminal that is notified from the LTE base station (eNodeB) on the Physical Downlink Control Channel (PDCCH) channel. The number of

  For example, in the case of LTE, the frequency band (d) currently allocated to the downlink of the terminal is the number of downlink RBs that can be used by the terminal notified from the LTE base station (eNodeB) through the PDCCH channel.

  In the case of LTE, since the above frequency allocation is updated at a cycle of 1 ms, a moving average value is obtained in a long period of about 3 seconds, for example, and the value is stored in the main body storage unit 15.

  The control unit 11 (used bandwidth ratio determining unit 113) of the cellular phone device 1 calculates the bandwidth ratio from the values obtained in the processing of steps S1 and S2 using the following formulas for the uplink and the downlink, respectively (FIG. 3). Step S3), storing in the main body storage unit 15.

Uplink bandwidth ratio (E) is
“Currently assigned uplink frequency band (c) to terminal” ÷ “all uplink frequency band (a) usable by operator corresponding to wireless network in which terminal is located”
Calculate with the following formula.

The bandwidth ratio (F) of the downlink is
“Currently assigned downlink frequency band (d) to the terminal” ÷ “all downlink frequency bands (b) usable by the operator corresponding to the wireless network in which the terminal is located”
Calculate with the following formula.

  The control unit 11 (used band ratio determining unit 113) of the mobile phone device 1 compares the amount of data flowing in the currently communicating uplink with the amount of data flowing in the downlink, and the uplink band under the following conditions: It is determined which of the ratio (E), the downlink bandwidth ratio (F), and the average of the uplink bandwidth ratio (E) and the downlink bandwidth ratio (F) is the bandwidth ratio to be displayed (FIG. 3 step S4).

  When the amount of data currently flowing in the uplink (terminal → base station direction)> the amount of data currently flowing in the downlink (base station → terminal direction), the uplink bandwidth ratio (E) is used.

  If the amount of data currently flowing in the uplink (terminal → base station direction) <the amount of data currently flowing in the downlink (base station → terminal direction), the downlink bandwidth ratio (F) is used.

  -If the amount of data currently flowing in the uplink (from the terminal to the base station) ≒ the amount of data currently flowing in the downlink (from the base station to the terminal), the uplink bandwidth ratio (E) and the downlink The average with the band ratio (F) is used. That is, “[uplink bandwidth ratio (E) + downlink bandwidth ratio (F)] / 2”. “≈” is determined as “≈” if, for example, the difference between the two is about ± 10%.

  The control unit 11 of the mobile phone device 1 measures the received power of the signal received by the wireless unit 12 at the received power measurement unit 13 and stores it in the main body storage unit 15 (step S5 in FIG. 3). For example, in the case of LTE, the received power is RSRP [described in 3GPP TS36.214 V9.0.0 (2009-12)]. A known method defined by 3GPP may be used as the method for obtaining the same, and description of the method for obtaining is omitted.

  For this received power value, for example, a moving average value over a period as long as 3 seconds is obtained, and the value is stored in the main body storage unit 15.

  The received power obtained here is the downlink received power, but is also used to determine the icon display of the uplink. For example, when the downlink reception power is small, it is conceivable that the distance between the base station and the terminal is large, and in this case, it can be determined that the uplink communication environment is also bad.

  The control unit 11 (display icon determination unit 114) of the mobile phone device 1 uses the correspondence table shown in FIG. 2 stored in the main body storage unit 15 in advance, the bandwidth ratio obtained in step S4, and the above step. From the received power measured in S5, an icon to be displayed on the main body display unit 14 is determined and displayed (step S6 in FIG. 3).

  For example, when (1) the band ratio is 50% and (2) the received power is 70 dBm, this corresponds to “★” shown in FIG. 2 and the number of antenna bars to be displayed is two.

  In this Embodiment, the display of the icon which should be displayed on the main body display part 14 is updated by repeating said step S1-S6 during LTE communication.

  As described above, in the present embodiment, even in a communication system in which the frequency band assigned to the terminal (mobile phone device 1) constantly changes, such as during LTE communication, the frequency band assigned to the terminal is used as a basis. Since the communication environment can be determined and an icon to be displayed on the main body display unit 14 can be displayed, the user can be informed of an accurate communication environment state.

  In other words, even if the received power is good, the communication speed will not increase if the allocated frequency band is narrow. However, in the conventional technology, the good / bad communication environment is judged only by the received power. Therefore, the correct display cannot be made in such a case. On the other hand, according to the present embodiment, it is possible to determine whether the correct communication environment is good or bad.

  The above index is determined by the ratio of “frequency band currently allocated to the terminal” with respect to “all frequency bands available to the operator corresponding to the wireless network in which the terminal is located” and can be used for each operator. Even if the frequency bandwidths are different, it is possible to correctly judge whether the communication environment is good or bad.

  For example, if there is an operator who can use the 20 MHz frequency band and an operator who can only use 3 MHz, even if the frequency assigned to the terminal is the same 3 MHz, the former is “bad” and the latter is “good”. Judgment can be made.

  Furthermore, in the present embodiment, even in the case of a communication system in which frequency bands are allocated separately for the uplink and the downlink as in LTE, the amount of data flowing in the uplink and the amount of data flowing in the downlink And switching whether to use the uplink or downlink frequency allocation to determine whether the communication environment is good or bad, so the icons to be displayed can be combined into one for the uplink and downlink. it can.

  In the above-described first embodiment of the present invention, the procedure in the LTE mobile phone system has been described. However, the procedure is not particularly limited to LTE.

  In the first embodiment of the present invention, the bandwidth ratio of each of the uplink and the downlink is obtained by the processing of the above steps S1 to S3. However, the processing necessary for display is performed by performing the processing of step S4 first. Only a method of calculating the bandwidth ratio may be used. For example, when the downlink band ratio is displayed in the process of step S4, the calculation of the uplink band ratio in the processes of steps S1 to S3 can be omitted.

  In the first embodiment of the present invention, the received power RSRP is used in the processing of step S5 described above. However, RSRQ (Reference Signal Received Quality) [3GPP TS36.214 V9.0.0 (2009-12). Other values defined in 3GPP may be used. In this case, the correspondence table shown in FIG. 2 is also defined by RSRQ instead of RSRP.

  In the first embodiment of the present invention, the combination of the band ratio and the received power is used as the condition for determining the icon in the processing of step S5 described above, but another condition may be added. In LTE, support for MIMO (Multiple Input Multiple Output) technology is standardized, but the number of MIMO antennas may be added as a condition.

  For example, when communicating with 2 × 2 MIMO, the number of antennas obtained from the correspondence table shown in FIG. 2 is set to +1. When communicating with 4 × 4 MIMO, the antenna obtained from the correspondence table shown in FIG. The number is +2.

  In the first embodiment of the present invention, the icons are combined into one, but for example, the bandwidth obtained in the processing of steps S1 to S3 and the received power obtained in the processing of step S5 are separately provided. You may display with the icon. In addition, although the uplink, downlink, or average bandwidth is determined as a display target in the process of step S4, separate icons are displayed for the uplink and the downlink without performing the process of step S4. It is also good.

(Appendix 1) A communication environment display method used for a mobile phone device in a system that performs communication in which a frequency band assigned to the mobile phone device is dynamically changed.
The mobile phone device has a good communication environment using a ratio between a frequency band allocated to the mobile phone device and a total frequency band that can be used by a carrier corresponding to a wireless network in which the mobile phone device itself is located. 1st step for judging / bad, 2nd step for measuring received power of the mobile phone device, and 3rd step for displaying on the display means an icon indicating good / bad communication environment And
In the first step, an icon to be displayed on the display unit is determined by combining the received power measured in the second step and a determination result of good / bad communication environment. Communication environment display method.

  (Supplementary note 2) In the first step, an uplink data amount and a downlink data amount in the mobile phone device are compared, and at least an index of a bandwidth ratio for judging whether the communication environment is good or bad The communication environment display method according to appendix 1, wherein which of the uplink and the downlink is used to determine is determined.

  (Supplementary note 3) The communication environment display method according to supplementary note 1 or 2, wherein the communication system is an LTE (Long Term Evolution) system.

  (Supplementary note 4) The communication environment display method according to supplementary note 3, wherein, in the first step, a number of MIMO (Multiple Input Multiple Output) antennas is added as a condition for determining the icon.

DESCRIPTION OF SYMBOLS 1 Cellular phone apparatus 10 Antenna 11 Control part 12 Radio | wireless part 13 Received power measurement part 14 Main body display part 15 Main body memory | storage part 111 All frequency band calculating part 112 Terminal frequency band calculating part 113 Use band ratio determining part 114 Display icon determining part

Claims (7)

Mobile phone frequency band allocated to the system is a cellular telephone apparatus that is used in a communication system performing communication changes dynamically,
Calculate the ratio of the frequency band allocated to the device for the uplink and downlink to the total frequency band ,
Compare the amount of uplink data and the amount of downlink data in its own device, and display the state of the communication environment using either the ratio for the uplink or the ratio for the downlink A mobile phone device characterized by that. Mobile phone frequency band allocated to the system is a cellular telephone apparatus that is used in a communication system performing communication changes dynamically,
Displays the status of the communication environment using the ratio of the frequency band allocated to the device and the total frequency band of uplink or downlink ,
A cellular phone device that displays the state of the communication environment by further using the number of MIMO (Multiple Input Multiple Output) antennas . A communication system comprising the mobile phone device according to claim 1 . A communication environment display method used for the mobile phone device in a system that performs communication in which a frequency band assigned to the mobile phone device dynamically changes,
The mobile phone device is
Calculating a ratio between a frequency band allocated to the mobile phone device for uplink and downlink and a total frequency band ;
Compare the amount of uplink data and the amount of downlink data in the cellular phone device, and use either the ratio for the uplink or the ratio for the downlink to determine the state of the communication environment communication environment display method and executes the step of displaying a. A communication environment display method used for the mobile phone device in a system that performs communication in which a frequency band assigned to the mobile phone device dynamically changes,
The mobile phone device is
Displaying the state of the communication environment using the ratio of the frequency band allocated to the mobile phone device and the total frequency band of uplink or downlink ;
And a step of displaying the state of the communication environment by further using the number of MIMO (Multiple Input Multiple Output) antennas . A program to be executed by a central processing unit in the mobile phone device in a system that performs communication in which a frequency band assigned to the mobile phone device dynamically changes,
A process of calculating a ratio between a frequency band allocated to the mobile phone device for an uplink and a downlink and a total frequency band ;
Compare the amount of uplink data and the amount of downlink data in the cellular phone device, and use either the ratio for the uplink or the ratio for the downlink to determine the state of the communication environment a program characterized by including a process of displaying. A program to be executed by a central processing unit in the mobile phone device in a system that performs communication in which a frequency band assigned to the mobile phone device dynamically changes,
A process for displaying the state of the communication environment using the ratio of the frequency band allocated to the mobile phone device and the total frequency band of the uplink or downlink ;
And a process for displaying the state of the communication environment by further using the number of MIMO (Multiple Input Multiple Output) antennas .

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