JP2011024036A - Transmission state display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display information about a transmission state, which is easy for a user to understand, on a transmission state display device in a remote control and monitoring system or the like. <P>SOLUTION: With respect to transmission state display devices 36, 37, and 40 for displaying information about the transmission state of digital radio transmission, an evaluation value acquisition means acquires information on evaluation values of a plurality of different evaluation indexes with respect to a signal transmitted by digital radio transmission, and a 3-level evaluation value determination means determines information on evaluation values in 3 levels, which results from integration based on information on evaluation values of the plurality of different evaluation indexes acquired by the evaluation value acquisition means, and a display means displays the information on evaluation values in 3 levels which are determined by the 3-level evaluation value determination means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a transmission status display device in, for example, a remote control monitoring system, and more particularly, to display information on a transmission status that is easy for a user to understand by displaying information on a comprehensive evaluation result regarding the transmission status. The present invention relates to a display device.

  For example, in the micro reception base station system as shown in FIG. 1, as a method for grasping the transmission state, information is provided to an operator (user) by displaying an evaluation value based on each evaluation index. Yes. In digital wireless transmission, more detailed information can be analyzed in the operation terminal by support data superimposed on a TS (Transport Stream) signal, and the user can make a more reliable determination as to whether or not transmission is possible. It was.

JP 2004-297722 A

  However, the problem here is the influence of the complexity due to the increase in the determination parameters. In the past analog transmission, the user can judge the state roughly by one parameter of the received electric field, and can recognize the state by the sharpness of the received video.

  On the other hand, in the current digital transmission, for example, parameters based on various evaluation indexes are added in addition to BER (Bit Error Rate), delay profile, and constellation. This is because it is difficult to evaluate the transmission state based on the received video, and state recognition / determination based on various parameters is indispensable. Of course, for users on the technical side who have a deep understanding of the corresponding system and transmission technology, more accurate judgment can be made based on these data. However, users on the operation side are often not familiar with the system, and it is often unclear what parameters are important and what values are required for each parameter. Absent.

  The present invention has been made in view of such a conventional situation, and by displaying information on a comprehensive evaluation result regarding the transmission state, it is possible to display information regarding the transmission state that is easy for the user to understand. An object is to provide a status display device.

In order to achieve the above object, according to the present invention, a transmission status display device that displays information related to the transmission status of digital wireless transmission has the following configuration.
That is, the evaluation value acquisition unit acquires information on evaluation values of a plurality of different evaluation indexes for signals transmitted by the digital wireless transmission. Based on the evaluation value information of a plurality of different evaluation indexes acquired by the evaluation value acquisition unit, the three-level evaluation value determination unit determines information of three-level evaluation values obtained by integrating them. The display means displays the information on the three-stage evaluation value determined by the three-stage evaluation value determination means.
Therefore, by displaying the information of the comprehensive evaluation result regarding the transmission state, it is possible to display the information regarding the transmission state that is easy for the user to understand.

Here, the digital wireless transmission may be applied to various types, for example, can be applied to wireless transmission in digital broadcasting.
Various evaluation indices (evaluation values) may be used.
Various numbers may be used as the number of different evaluation indexes (evaluation values) used for determining the information of the three-level evaluation values.
Various methods may be used as a method for determining three-level evaluation value information obtained by integrating the evaluation value information of a plurality of different evaluation indexes, for example, a plurality of different evaluation indexes. A method of determining three-level evaluation values by a predetermined mathematical formula using the evaluation value of the above as a parameter, or a method of determining using a correspondence table of evaluation values of a plurality of different evaluation indexes and three-level evaluation values Can be used.
Various modes may be used for displaying the information of the three-level evaluation value. For example, a mode in which the three-level evaluation value is distinguished or displayed as a traffic light or numbers (1, 2, 3 etc.), a display mode using characters, symbols, or the like.

  As described above, according to the transmission status display device according to the present invention, the information on the comprehensive evaluation result (information on the three-level evaluation value) regarding the transmission status is displayed, thereby making it easy to understand the transmission status for the user. Information can be displayed.

It is a figure which shows the structural example of the micro receiving base station system which concerns on one Example of this invention. It is a figure which shows an example of the display of the screen which added the comprehensive 3 step | paragraph state display in the operating terminal which concerns on one Example of this invention. It is a figure which shows an example of the setting screen of each evaluation parameter | index parameter for determining the comprehensive 3 step | paragraph state which concerns on one Example of this invention, and enabling a comprehensive 3 step | paragraph state display. It is a figure which shows an example of the display of the state change information in the comprehensive 3 step | paragraph state display part which concerns on one Example of this invention. It is a figure which shows an example of the display about the digital transmission state evaluation which concerns on the reference technique 1. FIG. It is a figure which shows the structural example (configuration example of a transmission status display apparatus) for evaluating the stability of the digital wireless transmission which concerns on the reference technique 1. FIG. It is a figure which shows an example of the display of the variation degree (stable value) of the constellation which concerns on the reference technique 1. FIG. It is a figure which shows an example of the display of the variation degree (stable value) of the delay profile which concerns on the reference technique 1. FIG. It is a figure which shows an example of the display of the margin and the fluctuation | variation degree (stable value) of a received electric field which concern on the reference technique 1. FIG. It is a figure which shows an example of the display of the comprehensive state judgment result of the digital transmission which concerns on the reference technique 1. FIG. It is a figure which shows an example of the method of the constellation evaluation which concerns on the reference technique 2. FIG. It is a figure which shows an example of the display of the direction adjustment operation screen in the operation terminal of the micro reception base station system which concerns on the reference technique 2. FIG. It is a figure which shows an example of the display of the constellation information containing the information regarding the evaluation value which concerns on the reference technique 2. FIG.

Embodiments according to the present invention will be described with reference to the drawings.
For example, as a method for transmitting a broadcasting material for television broadcasting to a television station head office, there is wireless transmission of the material. In recent years, the transmission system is shifting from analog transmission to digital transmission in accordance with the digitization of television broadcasting, and therefore, technical improvement in digital wireless transmission has become an important issue.
In such digital radio transmission, a micro-reception base station system including fixed radio transmission between base stations using FPU (Field Pick-up Unit) is generally used.
In this example, a case where the present invention is applied to a micro reception base station system is shown as an example of a remote control monitoring system.

FIG. 1 shows a configuration example of a micro reception base station system according to an embodiment of the present invention.
In the system of the micro reception base station system of this example, there are a transmission point 1 (transmission point A), a base station 2, a head office 3, and a transmission point 4 (transmission point B).
The transmission point 1 includes a transmission unit 11 and an antenna 12.
The base station 2 includes a rotation receiving antenna 21, a receiving unit 22, a transmitting unit 23, a fixed antenna 24, a controlled terminal station 25, and a modem unit 26.
The head office 3 includes a fixed antenna 31, a receiving unit 32, a rotating receiving antenna 33, a receiving unit 34, a decoding unit 35, an information generating unit 36, an information editing unit 37, a modem unit 28, a control terminal. A station 39, an operation terminal 40, a network 61, and a network 62 are provided.
The transmission point 2 includes a transmission unit 51 and an antenna 52.
In this example, a network 71 is provided that connects the modem unit 26 of the base station 2 and the modem unit 38 of the head office 3 so that they can communicate with each other.

An example of the operation performed in the micro reception base station system of this example is shown.
In this example, a case where a material is transmitted from the transmission point 1 and the transmission point 4 to the head office 3 is shown.
The material from the transmission point 1 (transmission point A) at a long distance from the head office 3 is wirelessly transmitted to the head office 3 through the base station 2. First, the transmission unit 11 at the transmission point 1 converts the material into a microwave signal that can be wirelessly transmitted, and transmits the radio wave from the antenna 12.
Here, the transmission unit 11 encodes a SDI (Serial Digital Interface) signal into a TS signal that is a frame format of a fixed-length packet format used for transmission in the FPU, modulates it into an intermediate frequency signal, It has a function of converting the frequency to a waveband and transmitting it to the antenna 12.

The radio wave transmitted from the transmission point 1 is received by the device of the rotation receiving antenna 21 in the base station 2 and sent to the receiving unit 22.
Here, the receiving unit 22 has a function of converting a microwave band signal into an intermediate frequency signal, demodulating it into the TS signal, and decoding it into an SDI signal. However, the receiving unit 22 in the base station 2 only needs to have a function for converting to the TS signal with no signal degradation at the minimum.

The TS signal is transmitted from the receiving unit 22 to the transmitting unit 23 and transmitted from the fixed antenna 24 by radio waves.
Here, similarly to the reception unit 22 described above, the transmission unit 23 in the base station 2 only needs to have a function of converting a TS signal into a microwave band signal at a minimum.
The radio wave transmitted from the base station 2 is received by the fixed antenna 31 of the head office 3, decoded into an SDI signal by the receiving unit 32 and the decoding unit 35, and sent to the main line.

  In addition, the material from the transmission point 4 (transmission point B) at a short distance from the head office 3 is transmitted from the antenna 52 through the transmission unit 51, directly received by the device of the rotary reception antenna 33 of the head office 3, and The data is decoded by the receiving unit 34 and the decoding unit 35 and sent to the main line.

In wireless transmission using such a system, it is important how efficiently the base station 2 can receive radio waves from the transmission point 1. That is, the direction of the reception antenna 21 in the base station 2 must be changed depending on the position of the transmission point 1. For this reason, in the micro receiving base station system, a receiving antenna 21 having a rotating base that can be rotated by remote control from the head office 3 (rotating receiving antenna) is used.
Similarly, in the head office 3, the rotation receiving antenna 33 is used for the transmission point 4.

A method for monitoring and monitoring the rotation receiving antenna 21 will be described.
Within the head office 3, the control packet transmitted from the operation terminal 40 to the network 61 is received by the control terminal 39 and converted into a serial signal. The serial signal is further modulated, for example, into an analog signal by the modem 38 and transmitted to the base station 2.
It is also possible to connect a plurality of operation terminals and a plurality of control terminal stations to the network 61 and perform transmission / reception by specifying a transmission partner and a reception partner based on identification information (ID) of each device.

The analog signal transmitted from the modem unit 38 is received by the modem unit 26 in the base station 2, demodulated into a serial signal, and then transmitted to the controlled terminal station 25.
The controlled terminal station 25 decodes the signal (control signal) received from the modem unit 26 and controls the device of the rotary receiving antenna 21 based on the decoding result.

Further, information (monitoring information) such as an angle in the device of the rotation receiving antenna 21 is sent to the controlled terminal station 25 as a monitoring signal.
The controlled terminal station 25 transmits the monitoring information to the modem unit 26 as a serial signal.
The modem unit 26 modulates the serial signal received from the controlled terminal station 25 into, for example, an analog signal and transmits the analog signal to the head office 3.

The modem unit 38 in the head office 3 demodulates the analog signal received from the modem unit 26 of the base station 2 into a serial signal and transmits the serial signal to the control terminal station 39.
The control terminal station 39 decodes the serial signal received from the modem unit 38 and transmits a monitoring packet to the network 61 based on the decoding result.
The operation terminal 40 receives the monitoring packet via the network 61 and displays it on the terminal as information.

As described above, it is possible to control and monitor the device of the rotation receiving antenna 21 in the base station 2.
Further, in the micro reception base station system of the present example, the reception level and transmission level in the reception unit 22 and transmission unit 23 installed in the base station 2 and the transmission / reception channel are the same as in the control monitoring of the apparatus of the rotating reception antenna 21 described above. (Frequency band), modulation method, transmission output, decoding method, and for example, contact switch selection of signal switch, signal input / output selection in signal multiplexing / demultiplexing device, etc. It is possible to control and monitor by a series of signal transmission in the terminal station 25 and the control device.

  Further, when transmitting directly to the head office 3 as in the case of material transmission from the transmission point 4, the rotation existing in the head office 3 using the signal transmission path of the operation terminal 40, the control terminal 39, and the control device. It is possible to control and monitor the device such as the receiving antenna 33 and the receiving unit 34.

  Further, in the micro reception base station system, as providing more detailed information for adjusting the direction of the receiving antenna, TMCC (Transmission and Multiplexing Configuration Control including transmission parameters such as reception frequency and modulation method in the receiving units 22 and 34 is provided. ) Support data such as information, reception level, margin (Margin Degree), BER, MER (Modulation Error Ratio), delay profile, constellation, etc. are superimposed on the TS signal and transmitted to the head office 3, and the information generation unit 36 The information is separated, edited by the information editing unit 37, and displayed on the operation terminal 40 (for example, its screen) via the network 62.

Hereinafter, the comprehensive three-level evaluation will be described in detail.
FIG. 2 shows an example of a screen display to which an overall three-stage status display is added on the operation terminal 40.
In the screen display of this example, the received electric field display units 101 and 102, the antenna angle display unit 103, the BER / margin display unit 104, the map and antenna angle display unit 105, the rotating antenna device and reception device setting display unit 106, the transmission point information A display unit 107 is provided, and an overall three-level state display unit 108 is further provided.

Here, for example, the conventional three-stage state display unit 108 is not conventionally provided, and the transmission state is determined by displaying a delay profile, a constellation, and the like. However, in this example, the delay profile and the constellation are usually displayed. By providing information in a comprehensive three-level status display without individually displaying detailed information related to each evaluation index such as communication, it is possible for a user with insufficient knowledge to immediately grasp the transmission status.
Also in this example, detailed information relating to each evaluation index such as a delay profile and a constellation may be individually displayed.

FIG. 3 shows an example of a setting screen for each evaluation index parameter for determining the overall three-stage state and enabling the overall three-stage state display.
In this example, set values are set for each stage of the overall three-stage state display in each evaluation index such as an electric field [dBm], a margin [dB], and a constellation [vs. 64QAM (Quadrature Amplitude Modulation) reference point distance ratio]. be able to.
Specifically, for each evaluation index, set number straight lines 111a, 111b, 111c, good stage setting reference values 112a, 112b, 112c, and attention stage setting reference values 113a, 113b, 113c are shown.

Here, in this example, the good stage setting reference value and the attention stage setting reference value can be set by the user, and the interval between the good stage setting reference value and the attention stage setting reference value is the attention stage. The better part is the good stage, and the worse part is the bad stage. And it is expressed by a set number straight line.
For example, in FIG. 3, for the electric field, the caution stage is between the good stage setting reference value (−60) and the caution stage setting reference value (−65), and is better than the caution stage (−60 or more). However, a place exceeding -60) is a good stage, and a place worse than the caution stage (a place below -65 or a place below -65) is a bad stage.
In FIG. 3, the margin is between the good stage setting reference value (10) and the caution stage setting reference value (15), and the margin is better than the caution stage (more than 15 or , A place exceeding 15) is a good stage, and a place worse than the caution stage (a place below 10 or a place below 10) is a bad stage.
Further, in FIG. 3, the constellation has a caution stage between the good stage setting reference value (0.5) and the caution stage setting reference value (0.3), which is better than the caution stage (0 .5 or more, or more than 0.5) is a good stage, and a place worse than the attention stage (a place below 0.3 or less than 0.3) is a bad stage.

  By using the setting screen as shown in FIG. 3 and setting in advance by an intelligent user, each parameter is analyzed and judged at each stage setting in the state display, and all stages are integrated. It is possible to provide information as

Here, the image data such as the delay profile and the constellation can be digitized by an arbitrary method, and the stage can be set (for example, refer to the reference techniques 1 and 2). In addition, in each evaluation index, it is possible to calculate a margin value, a degree of fluctuation (stable value), and a degree of stability (for example, refer to Reference Techniques 1 and 2), and perform stage setting based on each calculated value. As a result, it is possible to realize a comprehensive three-level state display.
As for the setting values at each stage, for example, a setting default value (reference reference value) can be displayed in advance based on the transmission setting for wireless transmission. The default value can be derived, for example, by calculating a difference with respect to the failure level from the margin value.

FIG. 4 shows an example of display of state change information in the comprehensive three-stage state display unit 108 shown in FIG.
In this example, as the state change information 121, information on the time (“09/09/30 12:34:56”) when the evaluation state of the comprehensive three-level evaluation is changed and information on the change factor (“margin”) are included. It is shown. In the general three-level state display, it is also effective to display information regarding the progress (change) of such a state.

  Further, for example, when the inside of the display frame of the state change information 121 is explicitly specified by the operation unit (for example, a keyboard or a mouse) of the operation terminal 40, detailed information of the evaluation index that has caused the change is displayed. By adopting such a configuration, the convenience of state confirmation can be improved. At this time, it is possible to immediately investigate the amount of change in the evaluation parameter at the time of the state change and the ratio of the fluctuation value to the margin by using the display of stability for such detailed information display.

  In addition, in the status progress display as described above, in addition to the time and the evaluation index that caused the change, for example, the state before the change is clearly indicated, and the state maintenance time before the change or after the change is displayed. It is also useful to keep it. This is particularly effective when, for example, time has elapsed since the transmission became possible, or when it is desired to immediately obtain MTBF (Mean Time Between Failure) or MTTR (Mean Time To Repair).

Further, the state of the comprehensive three-level evaluation can be used for later analysis / statistics, for example, by storing together with the evaluation value logging for each evaluation index.
For example, the operator (user) causes the cause by acquiring and quantifying all the information indicating the transmission state in the apparatus and providing only the comprehensive information obtained by integrating them to the user. It is possible to recognize only whether or not transmission is possible regardless of whether or not transmission is impossible, and even when factor investigation is necessary, it is possible to quickly obtain desired information from the inside of the apparatus.

  As described above, in the transmission state display method by the transmission state display device of this example, when displaying the transmission state of wireless transmission, the process of obtaining each evaluation value using a plurality of evaluation indices for one received signal (Step) and a process of obtaining and displaying a comprehensive three-stage evaluation obtained by integrating the obtained evaluation values.

  Further, in the transmission state display method of this example, for example, a process of calculating the degree of variation (stable value) of each evaluation index in the wireless transmission based on the amount of change of each evaluation value within a certain period, Each evaluation index is based on the margin value and the variability (stable value) when a positive difference held for each evaluation value with respect to the evaluation level in the minimum necessary evaluation index in the wireless transmission is a current margin value. Is performed, and one or more of the margin value, the variability (stable value), or the stability is used as a calculation element for comprehensive three-stage evaluation.

Further, in the transmission state display method of this example, at least one of the time when the overall three-stage evaluation is changed, the state before the change, and the maintenance time of the current or the state before the change is displayed.
Thus, in this example, for example, in the FPU operating terminal 40, parameters (for example, any plurality of parameters such as a delay profile and a constellation) are analyzed and digitized, and the priority and numerical value of each evaluation index are calculated. Based on the margin, stability, etc., one index that can be easily and easily determined is generated, and the level of the transmission state is displayed in three stages (such as a blue-yellow-red traffic light).

Therefore, in this example, in a remote control monitoring system using wireless transmission, etc., the transmission state (for example, the state of the transmission line) is determined by displaying a comprehensive three-stage evaluation that integrates a plurality of evaluation index parameters. It is possible to clarify the material and easily determine whether or not transmission is possible by the user.
In addition, for example, on the operation / display unit (in this example, the operation terminal 40) of a remote control monitoring system using wireless transmission, it is possible to recognize whether or not transmission is possible regardless of the level of mastery of the user, Even if detailed information is required, the necessary information can be efficiently acquired using, for example, calculation data held in the operation terminal 40 as in the conventional case.

  Here, various methods may be used as a method for integrating a plurality of evaluation values to obtain a comprehensive three-stage evaluation. For example, a total value of a plurality of evaluation values and two different threshold values (good, medium, About evil, a threshold value that is a boundary between good and medium, and a threshold value that is a boundary between middle and evil), or a three-stage from an average value of a plurality of evaluation values and two different threshold values Or a method in which even one of a plurality of evaluation values is bad if the evaluation is bad as a whole, and for example, a priority is assigned to a plurality of evaluation values. A method of evaluating based on an evaluation value having a high priority (for example, one or more predetermined number set in advance), or a plurality of evaluation values having a high priority, Increase the weight, add weight when summing each evaluation value, Based on the total value can be used a method of assessing, It is also possible to use a method that combines these several methods.

  In the micro reception base station system of this example, the transmission status display device is configured by the functions of the information generation unit 36, the information editing unit 37, and the operation terminal 40 in the head office 3, and in such a transmission status display device, Based on the function of the evaluation value acquisition means for acquiring the evaluation value information of a plurality of different evaluation indexes and the evaluation value information of the plurality of different evaluation indexes acquired, the three-level evaluation value information is determined by integrating them The information editing unit 37 (or another processing unit or a plurality of processing units) may be provided with the function of the three-level evaluation value determining means for displaying the information of the determined three-level evaluation value The operation terminal 40 has the function of the means.

[Reference Technology]
Reference techniques 1 and 2 that can be used in the above-described embodiments according to the present invention will be described below. Note that the reference techniques 1 and 2 shown here are not necessarily all conventional techniques, and may include new techniques.

(Reference technology 1)
(Overview of Reference Technology 1)
In the reference technique 1, a transmission state display device that displays information on a transmission state of digital wireless transmission has the following configuration.
That is, the evaluation value acquisition unit acquires information on a predetermined evaluation value within a predetermined period for a signal transmitted by the digital wireless transmission. Based on the information acquired by the evaluation value acquisition unit, the display unit displays a range of variation (for example, the degree of variation (stable value)) within the predetermined period for the predetermined evaluation value.

  Here, various evaluation values may be used. For example, the average distance or maximum distance in the constellation, the correlation level or delay amount related to the main wave or reflected wave in the delay profile, C / N ( Evaluation values relating to a margin such as Carrier to Noise), a received electric field, BER, MER, and the like can be used.

The transmission state display device according to the reference technique 1 has the following configuration as one configuration example.
That is, the stability calculation means calculates a stability based on a range of variation within the predetermined period as a numerical value for the predetermined evaluation value using a predetermined mathematical formula. The display means displays a numerical value of the stability calculated by the stability calculation means.

Therefore, by displaying the stability based on the range of fluctuation of the predetermined evaluation value within a predetermined period for the signal transmitted by digital wireless transmission as a numerical value, the information on the evaluation result of the transmission state in digital wireless transmission is effective. For example, you can know how stable the transmission line is, and more accurately know if the current margin is sufficient for the state of the transmission line It becomes possible to do.
Here, various formulas for calculating the stability may be used.

(Example of Reference Technology 1)
FIG. 5 shows a display example of a transmission state in digital wireless transmission.
Specifically, a constellation 601, a delay profile 602, a margin 603, a received electric field (bottom level) 604, a received electric field and margin level meter display 605, TMCC information 606, and a BER 607 are shown.

In this example, we propose a technology that uses the above-mentioned evaluation indicators to determine the fluctuation level (stable value) and stability of the transmission state in digital wireless transmission, and displays this on the display unit in a form that is easy for the state judge to understand. To do.
FIG. 6 shows a configuration example of a transmission status display device 2000 as a configuration example for evaluating the stability of digital wireless transmission according to Reference Technique 1.
The transmission status display device 2000 of this example includes a storage unit 2001, an analysis unit 2002, and a display unit 2003.

  In the configuration of the transmission state display device 2000 of this example, a received signal of digital wireless transmission is received using an arbitrary digital wireless transmission state evaluation method (for example, a conventional digital wireless transmission state evaluation method can be used). Evaluation data analyzed and evaluated are continuously input. The accumulation unit 2001 has a function of accumulating the evaluation data for a predetermined time, the analysis unit 2002 has a function of analyzing the accumulated evaluation data, and the display unit 2003 displays the result of the analysis. For example, it has a function of displaying on the screen.

The evaluation data includes a plurality of types of data in the digital wireless transmission state evaluation method. When this data gives information that is not quantified as an evaluation value, for example, the coordinate position of a received symbol (excluding an equalizer training symbol) in the constellation 601 shown in FIG. The analysis unit 2002 converts the evaluation data into a quantitative evaluation value based on an arbitrary evaluation method (for example, an evaluation method similar to the conventional one can be used).
As another configuration example, the evaluation data may be converted into a quantitative evaluation value and sent before the sending in the configuration shown in FIG.

Here, as one mode for realizing the configuration of the transmission status display device 2000 of this example, for example, it is conceivable to use a storage / calculation / display device of a computer terminal.
The following embodiments will be described based on display examples on the display unit (screen) 2003.

(Example 1 of Reference Technology 1)
FIG. 7 shows a display example of a state including the constellation variation (stable value) on the display unit 2003 according to the reference technique 1.
The reference point 201 is the signal point on the constellation closest to the received symbol, the reference point 202 is the second closest signal point, and the midpoint 203 is the midpoint of these two signal points. When the received symbols are plotted using the common reference points 201 and 202 for an infinite number of received symbols, a band-like distribution appears. That is, the received symbol includes an in-phase (I) component and a quadrature (Q) component that are independent from each other, and the square root of the square sum of the difference from the reference point 201 for both components is close to the chi-square distribution. Therefore, the density of the received symbols becomes maximum when the distance from the reference point 201 is a little away. Since the distribution varies depending on which point of the constellation is used as a reference point, a plurality of band-like distributions also appear. In FIG. 7, a distribution that appears farthest from the reference point 201 is represented as a maximum distribution band 205, and a distribution after averaging without distinguishing each distribution is represented as an average distribution band 204. The center and spread of each distribution of signal points are roughly determined by the type of constellation in a situation where the received signal can be properly equalized.

In this example, the position and width of the maximum distribution band 205 are stored in advance (in association with the constellation), and this distribution is schematically displayed in a sector shape. That is, the distance (or complex difference) between the received symbol and the reference point 201 calculated within the most recent fixed period TL is stored in the storage unit 2001, and the maximum and minimum distances detected within the fixed period TL are stored. A fan shape with a corresponding width is used to paint a predetermined color or the like. If only the maximum distribution band 205 is displayed, maximum and minimum detection may be performed for received symbols that are separated by a distance equal to or greater than a predetermined threshold. In FIG. 7, for the maximum distribution band 205, the maximum distance (max), the minimum distance (min), and the range (X) therebetween are shown for explanation. The center of the sector is set at an appropriate position to resemble the original distribution.
Further, the current distance from the reference point 201 is also displayed in an arc shape with other colors centered on the same point. Here, the current distance is, for example, averaged at about the same time Ts (several hundred ms) as the display update interval, and one fixed period TL is, for example, a relay time ( For example, it can be set arbitrarily according to 3 minutes).
The distance range X described above is a trajectory in which a data symbol calculated from a transmission signal moves within a certain period, and the data symbol that should originally be located at the ideal reference point is a constant due to signal degradation during transmission and interference of multiple signals. This is the range of error that moved on the coordinates.

  In this example, this error range is defined as the degree of variation (stable value) in constellation evaluation. In other words, the smaller the degree of fluctuation (stable value), the more stable the transmission line state can be recognized (subject to constant degradation / interference). Can be determined to be unstable.

Here, in the example of FIG. 7, only the band-like distribution 205 farthest from the reference point shows the degree of fluctuation (stable value), but the degree of fluctuation (stable value) of the average distribution band 204 can be obtained by the same method. Can be calculated and displayed. Also, it is considered useful to calculate and display the total degree of fluctuation (stable value) by adding the degree of fluctuation (stable value) of the maximum distance 205 and the degree of fluctuation (stable value) of the average distance 204. It is done.
Further, the degree of fluctuation (stable value) can also be expressed as a fluctuation range of an arbitrary evaluation value calculated by the constellation evaluation method.

  Further, based on the statistics of the maximum distribution band, it can be verified whether transmission for a predetermined time is safe or how many minutes can be safely transmitted. That is, the hypothesis that the variance obtained by using the maximum distribution band 205 as a normal distribution or a chi-square distribution is regarded as population variance, and one or more samples exceeding the midpoint 203 are extracted within a desired transmission time (that is, a desired number of samples). Is determined at a predetermined risk rate, and based on this, the judge makes a pass / fail decision on transmission. Alternatively, the ratio between the probability that the hypothesis occurs and the desired BER may be obtained, and the desired transmission time may be changed based on the ratio.

(Example 2 of Reference Technique 1)
FIG. 8 shows a display example of a state including the variation degree (stable value) of the delay profile on the display unit 2003 according to the reference technique 1.
Specifically, on the coordinates where the vertical axis represents the correlation level and the horizontal axis represents the delay amount, the main wave correlation 301, the reflected wave correlation 302, the delay reference (no delay) line 303, the noise and the main wave A minimum correlation level line 304 for distinguishing a reflected wave from a reflected wave, and a guard interval limit line 305 in OFDM (Orthogonal Frequency Division Multiplexing) transmission are shown.

At this time, the range in which the peak of the main wave fluctuates up and down within a certain period is stored in the accumulation unit 2001 as the correlation fluctuation degree (X1 in FIG. 8) in the delay profile evaluation, and the peak of the main wave is maintained for a certain period. The range that fluctuates left and right is stored in the storage unit 2001 as a delay variation degree (X2 in FIG. 8) in the delay profile evaluation, and is displayed together with the current situation.
The degree of fluctuation (stable value) described above is a trajectory in which the main wave fluctuates in terms of correlation and delay within a certain time, and the fluctuation amount of the delay profile varies according to the amount of fluctuation, as in the constellation shown in the first embodiment. The degree (stable value) can be determined.

  Here, in the example of FIG. 8, only the fluctuation degree (stable value) of the main wave is shown, but it is possible to calculate and display the fluctuation degree (stable value) of the reflected wave by a similar method. . Also, the total fluctuation degree (stable value) can be calculated by summing the fluctuation degree (stable value) of the main wave and the fluctuation degree (stable value) of the reflected wave, and the range of fluctuation of the reflected wave It is also useful to calculate the probability of exceeding the limit line within the transmission time.

(Example 3 of Reference Technique 1)
FIG. 9 shows a display example of a state including the margin and the received electric field variability (stable value) on the display unit 2003 according to the reference technique 1. This is a display example of a state including the variation degree (stable value) of the evaluation value indicated by the numerical level.
Specifically, a reception electric field level 401, a margin level 402, and a reference line 403 without a margin are shown.

At this time, the range in which the margin fluctuates within a certain period (X3 in FIG. 9) is stored in the storage unit 1001 as the margin evaluation fluctuation degree (stable value), and the current margin value (downward triangular marker) is stored. Display together.
The above-described variation (stable value) is a range in which a margin (margin) based on a required signal-to-noise ratio (C / N) varies, and is basically linked to variation in the received electric field level 401. ing. Based on this variation amount, the margin variation degree (stable value) can be determined in the same manner as the constellation shown in the first embodiment and the delay profile shown in the second embodiment.

  Here, in FIG. 9, only the marginal variation (stable value) is displayed, but the evaluation values that are digitized such as the received electric field, BER, and MER are visually measured by a level meter by a similar method. It is possible to calculate and display the degree of fluctuation (stable value) of the value in the converted display method.

(Example 4 of Reference Technique 1)
In this example, an example of a method of displaying a comprehensive state determination result of digital transmission on the display unit 2003 is shown.
FIG. 10 shows a simple display example of the transmission state including the evaluation of the stability in the digital transmission as a display example of the overall state determination result of the digital transmission according to the reference technique 1.
Specifically, on the screen of the display unit 2003 shown in FIG. 10, information on the constellation, delay profile, and margin that should be particularly noted among the state evaluation indexes peculiar to digital transmission that did not exist in the conventional analog transmission. It is displayed in the list. For each of these evaluation values, level meters 501a, 501b, 501c, fluctuation ranges 502a, 502b, 502c, stability levels 503a, 503b, 503c, and link buttons 504a, 504b, 504c to the detailed screen of each index are shown. .
Here, as an example of other evaluation values, it is also possible to display information related to the received electric field, BER, MER, and the like.

  In this example, for the level displays 501a, 501b, and 501c, the minimum level required for the evaluation is displayed as a reference line (vertical line in FIG. 10). The level meter 501a relates to the constellation, and the distance between the received symbol and the second closest signal point to the received symbol is the right-pointing linear axis, and the reference line is the midpoint 203 (see FIG. This corresponds to 7). The level meter 501b is obtained by setting the time when the latest reflected wave exceeding the lowest correlation level line 304 in the second embodiment (FIG. 8) advances from the limit line 305 as a right-hand linear axis, and the reference line is a limit line. This corresponds to 305. The level meter 501c has a received electric field margin in the third embodiment (FIG. 9) as a logarithmic axis facing right, and the reference line is the same as the reference line 403 without a margin.

Further, in this example, together with the level meters 501a, 501b, and 501c, changes in values within a predetermined time recorded by the above-described variation (stable value) calculation method are displayed as distributions 502a, 502b, and 502c.
As a display method of such a distribution, for example, according to the method of showing the distribution of each value converted into shades of color or color scheme within the range of fluctuating max and min as shown in FIG. A method of using a histogram or a graph with different heights can be used. It is also useful to display a graph with the time course as the vertical axis. Further, only the range between max and min may be displayed.

For the stability levels 503a, 503b, and 503c, for example, using the above-described reference line value, the above-described fluctuation amount, and its maximum and minimum values,
Stability = [1− {variability / ((maximum value + minimum value) / 2−value of reference line)}] × 100 [%]
And As a result, it can be seen at a glance how much the degree of variation (stable value) is with respect to the statistical average margin value from the default level to the present.

According to this method, the {(maximum value + minimum value) / 2} portion in the stability calculation formula is changed to the maximum value, the minimum value, the average value, the current value, or the like in accordance with the stability determination criterion. By doing so, it is possible to correspond to the user's system specifications and requirements.
Furthermore, as shown in FIG. 10, it is also useful to change the display color or display a warning on the basis of this stability value to alert the operator. It is also possible to add the current evaluation value to the reference for changing the display color and determine the display color from the comprehensive evaluation of the current value and the stability.

  Further, in this example, links 504a, 504b, and 504c to detailed displays that are shown in FIGS. 7, 8, and 9 are displayed for each simple state display. More specifically, when the constellation link 504a is designated, the screen shown in FIG. 7 is displayed, and when the delay profile link 504b is designated, the screen is displayed as shown in FIG. 8, and the margin link 504c is designated. Then, the screen display shown in FIG. 9 is obtained.

  In this example, for example, a simple screen is displayed for a judge who is unfamiliar with the state determination in digital wireless transmission, and a detailed screen is displayed for a skilled judge to request the judge. It is possible to provide material for determining the state according to the level. Here, a user such as a judge operates, for example, an operation unit (for example, a key, a mouse, a button, or the like) of the transmission state display device 2000 of the present example, thereby making the overall simplified as shown in FIG. Screen display of individual information and individual detailed information screen display as shown in FIGS. 7, 8, and 9 can be arbitrarily designated and displayed.

[Summary of the above examples]
As described above, in the transmission state display device 2000 of this example, in order to evaluate the stability of the transmission state in digital wireless transmission, a predetermined digital wireless transmission state evaluation method (for example, digital wireless transmission state evaluation similar to the conventional one) In a situation where evaluation data obtained by analyzing and evaluating the digital wireless transmission received signal can be continuously received using the storage unit 2001, the evaluation data is accumulated for a certain period of time and analyzed. The unit 2002 analyzes the accumulated evaluation data, and the display unit 2003 displays the analysis result.

  Further, in the transmission status display device 2000 of this example, the analysis unit 2002 that analyzes the accumulated evaluation data has a degree of variation in the digital wireless transmission according to a change amount of the evaluation value calculated from the evaluation data within a certain period. (Stable value) is calculated, and when the current evaluation value is a positive difference held with respect to the evaluation level in the evaluation method that is the minimum required in the digital radio transmission, the current margin value is the margin. The stability of the transmission state is obtained from the value and the degree of fluctuation (stable value).

  In the transmission status display apparatus 2000 of this example, the analysis result display unit 2003 can display the distribution of evaluation values, the degree of variation (stable value), and the stability in addition to the current evaluation value. In addition, it is possible to display a transmission state in stages according to the skill level of a person who determines whether or not digital wireless transmission can be operated.

  Therefore, the transmission status display device 2000 of this example can evaluate the stability of the transmission status in digital radio transmission. For example, the margin to the transmission failure level indicated by the conventional radio transmission status evaluation method is the digital Whether or not the level is sufficient in the wireless transmission line state can be determined more accurately from the display unit 2003 by the person who determines the transmission state. In addition, the information can be provided according to the skill level of the judge, and the system can be used by a wide range of users.

As described above, the transmission status display device 2000 of this example calculates, analyzes, and evaluates the fluctuation amount of the evaluation data within a predetermined time in the digital radio transmission, and evaluates the stability of the transmission status in the digital radio transmission. For example, the stability of the transmission state can be clearly displayed on the display unit 2003 as a quantitative numerical value, and the determination of whether or not the digital wireless transmission can be operated can be further supported by, for example, a conventional method. In this example, for example, each degree of variation (stable value) can be quantified with respect to a conventional evaluation index in digital wireless transmission.
In this example, information on the error vector (FIG. 7), delay profile (FIG. 8), reception level or margin (FIG. 9), etc. within the most recent predetermined period is displayed on the screen as a histogram, and the minimum value thereof. It is displayed on the screen so that the maximum value can be understood.

  In the transmission status display device 2000 of this example, for a signal transmitted by digital wireless transmission, for example, a function of acquiring information on a predetermined evaluation value within a predetermined period from the outside, or storing (storing) it in the storage unit 2001 Based on the evaluated data, the analysis unit 2002 performs analysis, whereby the evaluation value acquisition unit is configured by a function of acquiring information of a predetermined evaluation value within a predetermined period for a signal transmitted by digital wireless transmission. Further, for example, the stability calculating means is provided by the function of calculating, as a numerical value, the stability based on the range of variation within a predetermined period for a predetermined evaluation value by using the mathematical formula set in advance by the analysis unit 2002. And a function for displaying various types of information on the screen by the display unit 2003 (and, if necessary, an analysis unit 2002). Display means is constituted by a function) for generating information to be more displayed.

(Reference technology 2)
(Outline of Reference Technology 2)
In the reference technique 2, a transmission state display device that displays information on a transmission state of digital wireless transmission has the following configuration.
That is, the evaluation value calculation means is configured to determine the distance d between the data symbol point in the constellation of the signal transmitted by the digital radio transmission and the reference point of the data symbol in the ideal constellation (of Reference Technique 2 described later). A predetermined evaluation value is calculated on the basis of the example). The display means displays the evaluation value calculated by the evaluation value calculation means as information relating to the transmission state of the digital wireless transmission.

  Therefore, for example, in the terminal display of the micro reception base station system, it is possible to easily determine the reception state by the operator using the evaluation value of the constellation and the time history of the constellation.

Here, the point of the data symbol in the constellation of the signal transmitted by digital wireless transmission represents the point (position) of the data symbol of the actually transmitted signal, and the data symbol in the ideal constellation The reference point represents a point (position) of a data symbol in an ideal case where there is no error during transmission.
In order to calculate the evaluation value, for example, a minimum distance L between reference points in an ideal constellation (see an example of Reference Technique 2 described later) can be used.

Various evaluation values may be used, and a margin value D and an average error E (see an example of Reference Technique 2 described later) can be used as a preferable example.
Various methods can be used for displaying the evaluation value on the screen. For example, a method of displaying a numerical value, a method of displaying it in a graph, a method of displaying a time history, or the like is used. be able to.

(Example of Reference Technology 2)
Take a micro-receiving base station system as shown in FIG. For convenience of explanation, the same reference numerals as those shown in FIG. 1 are used for explanation.
Here, what is important is information on the tone support data, which is a material for adjusting the direction of the receiving antenna.
In the case of transmission through the base station 2, this information is in the monitoring information sent from the receiving unit 22 in the base station 2 to the operation terminal 40 through the controlled terminal station 25 and the control terminal station 39 of the head office 3. Alternatively, in the base station 2, when the receiving unit 22 receives the received signal from the apparatus of the rotary receiving antenna 21, converts it into a TS signal, and transmits it, the tone support data is multiplexed in the TS signal.

  After the TS signal multiplexed with it is sent back to the TS signal at the receiving unit 32 of the head office 3 through the fixed line of the fixed antennas 24 and 31 through the transmitting unit 23 and transmitted, The information generator 36 separates the transmitted TS signal. The separated tone support data is edited in a form that is easy for the operator to understand in the information editing unit 37, transmitted to the operation terminal 40 through the network 62, and displayed on the terminal screen.

  Further, the tone support data in the case of being directly transmitted to the head office 3 is displayed on the terminal screen by the monitoring information transmitted from the receiving unit 34 that receives the signal to the operation terminal 40 through the control terminal station 39, or The tone support data multiplexed on the TS signal by the receiving unit 34 is separated by the information generating unit 36, edited by the information editing unit 37, and then transmitted to the operation terminal 40, thereby being displayed on the terminal screen. .

  As described above, the operator at the head office 3 uses the operation terminal 40 to check the information on the reception state at the reception units 22 and 34 and connect the devices of the rotary reception antennas 21 and 33 and the reception units 22 and 34. Control and adjust the antenna direction and the reception setting for the transmission points 1 and 4.

Thus, since the operator who controls each apparatus needs to judge the present receiving state from the information displayed on the terminal screen, the tone support data used as the material is necessary for the micro receiving base station system. Indispensable information.
Further, unlike the conventional analog wireless transmission, there are a plurality of state parameters for the digital transmission state in addition to the received electric field level. Information included in the current tone support data includes, for example, TMCC information including transmission parameters such as reception frequency and modulation method in the reception units 22 and 34, reception level, margin, BER, delay profile, constellation, and the like. However, since only one index is insufficient as information for evaluating the transmission state, usually, comprehensive evaluation is often performed using a plurality of indices.

Next, constellation evaluation performed in the micro reception base station system of this example will be described in detail.
In this example, the information editing unit 37 evaluates the constellation.
Here, it is assumed that a data symbol group indicated by the constellation of the signal under investigation analyzed per unit time is generated by the information generation unit 36 and sent to the information editing unit 37.

FIG. 11 shows an example of a constellation evaluation technique performed by the information editing unit 37 in such a case. Specifically, ideal reference points 1201 and 1202 on the constellation, an intermediate point 1203, and a data symbol 1204 are shown.
In general, a constellation in digital wireless transmission is developed on IQ coordinates. Here, I represents an in-phase component of a signal in digital wireless transmission, and Q represents an orthogonal component of the signal.

In FIG. 11, a reference point 1201 and a reference point 1202 are excerpts of ideal reference points indicated by an ideal constellation calculated by the signal modulation method, and the reference point 1202 exists at a distance L closest to the reference point 1201. One of the ideal reference points. Point 1203 is an intermediate point between reference point 1201 and reference point 1202, and the distance between point 1203 and the reference point (reference point 1201 or reference point 1202) is (L / 2). The data symbol 1204 is one of the data symbol groups provided by the information generation unit 36.
In this example, for all the data symbols 1204 provided by the information generator 36, distances d to the nearest ideal reference points 1201 and 1202 are calculated, and the maximum value among them is set as the maximum error Md. Then, a difference between (L / 2) and the maximum error Md is calculated, and this is set as a first evaluation value as a constellation margin value D.

  In digital transmission, when there is a stable reception state where there is a sufficient received electric field, BER is sufficiently low, and a margin is taken, the constellation indicating the transmission state of the transmission is a symbol that is almost the same as the ideal constellation. Indicates placement. At this time, since the data symbols 1204 are located so as to concentrate on the ideal reference points 1201 and 1202 of the ideal constellation, d calculated for each data symbol 1204 is small, and the maximum error Md is also small. .

  On the other hand, when the state deteriorates and the received electric field decreases, the BER increases, or the margin disappears, the constellation symbol arrangement does not concentrate on the ideal reference points 1201 and 1202, and the transmission state Since the deterioration appears as an increase in the value of each d, the maximum error Md also increases. At this time, the distance d from the ideal reference points 1201 and 1202 is related to the margin of the distance from the data symbol to be located at another ideal reference point. Data symbols that should be located at points will interfere with each other, resulting in signal errors.

Thus, the maximum error Md indicates the risk of interference with other data symbols, and it can be seen that the maximum error Md is useful as a measure for judging whether the transmission state is good or bad.
The distance L is related to the amount of information that can be transmitted per unit time according to the signal modulation method. When this amount of information increases, the number of ideal reference points increases on the constellation, and the interval between each reference point is narrowed. Therefore, positional interference between data symbols is likely to occur.
Since the margin value D defined above indicates an absolute margin value for positional interference between data symbols in the constellation, the transmission state can be evaluated regardless of the modulation scheme (transmission rate). Is possible.

Next, as the second evaluation value, an average of d calculated for each symbol is calculated as an average error E.
Since the average error E is an average absolute deviation when the difference in coordinates between the data symbol 1204 and the ideal reference points 1201 and 1202 is taken as a deviation, the dispersion degree of the data symbol group can be read from this value.
This value can be replaced by a known state evaluation value MER. However, the calculation method of MER is obtained by converting the absolute value of the distance vector of the data symbol 1204 into power and the ideal reference points 1201 and 1202. In the evaluation on this constellation, since the comparison with the margin value D cannot be made, the above average error E is used as the evaluation value using the calculated d. Yes.

Here, as a method of calculating the maximum error Md related to the margin value D, for example, averaging the upper number% (for example, the upper constant number) of d calculated for all symbols, or The smallest d among the upper several% (for example, the upper constant number) can be adopted, and can be set in any way according to the setting criteria.
Further, for the margin value D, for example, a certain number is added to or subtracted from {(L / 2) -Md}, or a certain ratio is multiplied / divided with respect to {(L / 2) -Md}. It can also be used as an evaluation value.

As a method of calculating the average error E, for example, a numerical value indicating the degree of dispersion such as a standard deviation of d, or an overall number such as d of the upper few% (for example, upper constant number) as a whole. It is also possible to use a value extracted on the basis of a certain standard.
Further, as evaluation in units of squares using variance, it is also possible to use a method in which the maximum error Md is squared and both are compared and evaluated in a square dimension.

With reference to FIG.12 and FIG.5, the terminal display of the micro receiving base station system of this example is demonstrated.
FIG. 12 shows an example of the display of the direction adjustment operation screen (direction screen) on the operation terminal 40 of the micro reception base station system of this example.
In the direction adjustment operation screen of this example, as a display area for each monitoring information, a meter (BL meter display unit) 1301 that visually represents the received electric field of the receiving units 22 and 34, and a portion that represents the BL value as the value of the received electric field (BL value display unit) 1302, a portion (rotational reception antenna device angle display unit) 1303 representing the angle of the device of the rotation receiving antennas 21, 33, and a monitoring portion representing the state of the rotation reception antennas 21, 33 ( Rotation receiving antenna device monitoring display unit) 1304, a monitoring part (reception unit monitoring display unit) 1305 representing settings and states of the receiving units 22 and 34, and a control unit for controlling the devices of the rotating reception antennas 21 and 33 (Rotation receiving antenna device control display unit) 1306, a map screen portion (map display unit) 1307 indicating the position and direction of the antenna, scale change of the map and the map Button for causing the display of altitude information (map display button) 1308 is provided.

  Further, the direction adjustment operation screen of this example is provided with a button (tone support data display button) 1309 for displaying the tone support data. When the operator operates the mouse or the like and presses the tone support data display button 1309, the tone support data display window can be displayed.

FIG. 5 shows an example of a display of a tone support data display window which is a screen for displaying tone support data on the operation terminal 40 of the micro reception base station system of this example.
In the tone support data display window of this example, a part representing the BER state (BER display part) 607, a part representing the margin (margin) (margin display part) 603, and a part representing the BL value (BL value display) Part) 604, BL meter (BL meter display part) 605, part representing TMCC information (TMCC information display part) 606, part representing delay profile information (delay profile information display part) 602, and constellation A portion (constellation display portion) 601 to be represented is provided.

In this example, the information about the evaluation values (the first evaluation value D and the second evaluation value E) is further added to the constellation display shown in FIG. Display.
FIG. 13 shows an example of display of constellation information including information related to the evaluation value of this example on the operation terminal 40 of the micro reception base station system of this example.
In the constellation information display screen of this example, a portion (modulation method / error) that displays a signal modulation method and an error limit (for example, (L / 2) described above) calculated by the modulation method at the top of the screen. A limit display portion 1501 and a portion (constellation evaluation value display portion) 1502 for displaying each evaluation value (margin value D, average error E, maximum error Md) are provided.

In addition, the constellation information display screen of this example is provided with a portion for displaying a margin value D, an average error E, and a maximum error Md in a graph.
Specifically, reference points 1503 and 1504 represent ideal reference points for the constellation. An intermediate point 1505 represents an intermediate point between both reference points 1503 and 1504. As a result, the error limit can be expressed by the distance between the reference points 1503 and 1504 and the intermediate point 1505.
Further, by displaying an average error (average error E) 1506, a maximum error (maximum error Md) 1507, and a margin value (margin value D) 1508 on a straight line connecting the reference point 1503 and the reference point 1504, the current state can be displayed. It can be read visually.

At this time, for example, when the distance between the reference points 1503 and 1504 on the screen is changed according to the change in the error limit, the margin between the reference points determined by the transmission method (limit error) is also visually confirmed. It can be understood.
It is also useful to alert the operator by changing the display color of each value or line according to the change in value. In addition, when the evaluation value exceeds a certain threshold value (or when the evaluation value becomes less than the certain threshold value, etc.), a warning message is displayed on the screen of the operation terminal 40 and notified with a warning sound. Information can be provided.

  Here, with respect to the display of information as shown in FIG. 13, it is possible to use a method of creating a screen as shown in FIG. 13 in the information editing unit 37 and providing it to the operation terminal 40 through, for example, a WEB encoder. it can. Alternatively, a method of creating and displaying a screen based on data provided from the information editing unit 37 on the operation terminal 40 can also be used.

  With the display of this example, the constellation can be evaluated as a quantitative value. As a result, data that has been stored as images (or videos) can be stored as values, and a significant reduction in the required amount of information storage resources can be realized. Further, since the history of the constellation can be recorded as a change in value, the past data analysis can be greatly improved by statistical processing of the evaluation value or graphing.

As an example, the constellation information display screen of this example shown in FIG. 13 is provided with a button (graph display button) 1509 for performing graph display. Then, in response to the operator operating the mouse or the like and pressing down the graph display button 1509, the numerical value history 1510 of the evaluation value is graphed and displayed below the graph display button 1509. In this case, for example, it is also effective to display a plurality of evaluation values at a time to enable visual comparison.
In addition, for example, in the display portion of the average error 1506, the maximum error 1507, and the margin value 1508, a display in which the range that has moved during a certain past period is overlapped (for example, the range of max and min in the figure) is displayed. Thus, it is possible to determine the state by grasping the stability / instability of the state based on the range of the evaluation value and the peak value.

As described above, in the micro reception base station system of this example, the signal constellation in the digital radio transmission is displayed as the status display of the digital radio transmission on the display screen for establishing or adjusting the transmission path of the digital radio transmission. Displays the transmission state including the evaluation value calculated from.
Specifically, as the evaluation value, for example, regarding the constellation of the received signal, the distance between each data symbol of the constellation and the ideal reference point indicated by the ideal constellation calculated by the transmission modulation scheme, A value calculated using the minimum distance between reference points in the ideal constellation is used. Then, information including the evaluation value and the history is displayed on the operation terminal 40.
In this example, the above-described evaluation value can be expressed using an objective and quantitative value, and the constellation time history can be stored and expressed as a change in the evaluation value with a small amount of data. It is.

  Therefore, in this example, the constellation in digital wireless transmission can always be objectively and quantitatively evaluated, and the time constellation of the constellation can be stored and expressed as a change in its evaluation value with a small amount of data. As a result, a new evaluation index can be given to the terminal display of the micro reception base station system, and the determination (determination) of the transmission state by the operator can be supported (supported) more than before. In this way, in this example, by evaluating and displaying the transmission state from the constellation, for the operator etc., referring to the information such as the evaluation value of the constellation and the time history of the constellation with a graph or the like, It is possible to realize a situation in which the reception state can be more easily determined.

In the micro reception base station system of this example, the transmission status display device is configured by the functions of the information generation unit 36, the information editing unit 37, and the operation terminal 40 in the head office 3, and in such a transmission status display device, The function of the evaluation value calculation means for calculating a predetermined evaluation value (in this example, margin value D and average error E) may be provided to the information editing unit 37 (or other processing units or a plurality of processing units). The operation terminal 40 has a function of display means for displaying the calculated evaluation value on the screen.
[End of reference technology]

Here, the configuration of the system and apparatus according to the present invention is not necessarily limited to the configuration described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various systems and devices.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the system and apparatus according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. A controlled configuration may be used, and for example, each functional unit for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

1, 4 ··· Transmission point 2 ·· Base station 3 · · Head office 11, 23, 51 · · Transmitter 12, 52 · · Antenna 21, 33 · · · Rotating reception antenna 22, 32, 34 ..Receiving section 24, 31 .. Fixed antenna 25..Controlled terminal station 26, 38..Modulation / demodulation section 35..Decoding section 36..Information generation section 37..Information editing section 39. ..Control terminal station, 40..Operating terminal, 61, 62, 71..Network,
101, 102 .. Received electric field display unit, 103 .. Antenna angle display unit, 104... BER and margin display unit, 105 .. Map and antenna angle display unit, 106 .. Rotating antenna device and reception device setting display unit, 107..Transmission point information display section, 108..Total three-stage status display section,
111a to 111c ··· setting number line, 112a to 112c · · good stage setting reference value, 113a to 113c · · attention level setting reference value,
121 .. State change information,
201, 202 ··· ideal reference point, 203 ·· midpoint of two ideal reference points, 204 · · average distance, 205 · · maximum distance,
301 .. Correlation of main wave, 302 .. Correlation of reflected wave, 303 .. Reference line of delay (no delay) line, 304 .. Minimum correlation level line, 305 .. Limit line of guard interval,
401 .. Received electric field level, 402 .. Margin level, 403 .. Reference line without margin,
501a, 501b, 501c ... Level meter 502a, 502b, 502c ... Variable range 503a, 503b, 503c ... Stability, 504a, 504b, 504c ... Link button,
601 .. Constellation (constellation display section) 602 .. Delay profile (delay profile information display section) 603 .. Margin (margin display section) 604 .. Received electric field (BL value display section) 605. Received electric field and margin level meter display (BL meter display part), 606 ·· TMCC information (TMCC information display part), 607 ·· BER (BER display part),
1201, 1202 ..Ideal reference point, 1203..Intermediate point, 1204..Data symbol,
1301 ··· BL meter display portion, 1302 ··· BL value display portion, 1303 ··· Rotation receiving antenna device angle display portion, 1304 ··· Rotation receiving antenna device monitoring display portion, 1305 ··· Reception portion monitoring display portion, 1306 ··· Rotation receiving antenna device control display unit, 1307... Map display unit, 1308... Map display button, 1309.
1501 .. Modulation method Error limit display section 1502 Constellation evaluation value display section 1503 1504 Ideal reference point 1505 Intermediate point 1506 Average error 1507 Maximum error 1508・ Margin, 1509 ・ ・ Graph display button, 1510 ・ ・ Numerical history of evaluation value,
2000 ... Transmission status display device 2001 ... Storage unit 2002 ... Analysis unit 2003 ... Display unit

Claims (1)

In a transmission status display device that displays information about the transmission status of digital wireless transmission,
Evaluation value acquisition means for acquiring information of evaluation values of a plurality of different evaluation indexes for a signal transmitted by the digital wireless transmission;
Based on evaluation value information of a plurality of different evaluation indexes acquired by the evaluation value acquisition means, three-stage evaluation value determination means for determining three-stage evaluation value information integrated with each other;
Display means for displaying information on the three-stage evaluation value determined by the three-stage evaluation value determining means;
A transmission state display device comprising: