Radio zone display device

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a radio zone display device that displays a range covered by a radio base station on a screen.

【0002】

[Conventional technology]

In a mobile communication system, a large number of wireless zones are arranged over the entire service area so that there are as few gaps as possible between the zones. At that time, the maximum size that each radio zone can take is systematically determined by the allowable propagation delay and the like.

【0003】

In areas with low traffic, the size of the radio zone can be set to the maximum size determined systematically, but in areas with high traffic such as office districts, one radio base station can be used. The transmission power from the wireless base station is reduced so that the traffic amount is commensurate with the number of mobile terminals that can be accommodated, and the arrangement of the wireless base station is determined so that the wireless zone is narrowed.

【0004】

[Problems to be Solved by the Invention]

However, even if the traffic is estimated at the time of designing the wireless base station (station design), the optimum size of the wireless zone is calculated, and the wireless base station is actually installed based on this, the number of subscribers and services will increase thereafter. Due to the increase in types, the amount of traffic may exceed the maximum number of mobile terminals that can be accommodated in a wireless base station. Recently, in the office district, in the evening when the leaving of each company is concentrated, the traffic of mobile phones has increased rapidly, and it has become difficult to connect to the phone.

【0005】

As a countermeasure against such a problem, when traffic is concentrated in one radio zone, the transmission power from the radio base station in that radio zone is reduced to narrow the radio zone, while the adjacent radio zone (relatively). It is effective to expand the radio zone with a margin) and distribute a part of the concentrated traffic to the adjacent radio zone. That is, since the traffic is distributed and processed by each radio base station, it is possible to efficiently process the peak of the traffic that occurs concentrated in a specific time and a specific area.

【0006】

In order to realize this method, it is important to control the transmission power increase / decrease of wireless signals. Not only the communication quality of the upper and lower lines, but also the traffic volume of each adjacent wireless base station including its own station and radio waves. It is necessary to appropriately control the transmission power in consideration of the state and the like. That is, it is necessary to determine the transmission power while examining the relationship between the ever-changing traffic amount, the transmission power value from the radio base station, and the size of the radio zone.

【0007】

However, in order to investigate the relationship between such parameters, it is necessary to collect various data of the radio base station or the base station control device by using the history function, and to perform analysis based on the data later.

【0008】

In this case, since the historical data is numerical data, it is difficult to understand the relationship between the overlapping radio zones between adjacent base stations and the mutual relationship between the number of accommodated mobile terminals and the size of the wireless zone, and traffic is concentrated. There is a problem that it is difficult to analyze manually because it is not possible to visually know where the area is.

【0009】

The present invention solves the above-mentioned problems, and an object of the present invention is to enable real-time and visual grasp of the expansion of the radio zone covered by the radio base station.

【0010】

[Means for solving problems]

The wireless zone display device of the present invention makes it possible to superimpose and display the mutual relationship of the wireless zones of each wireless base station on one screen, thereby improving the user interface performance and improving the user interface performance. The size and position of the wireless zone can be visually confirmed in real time.

【0011】

BEST MODE FOR CARRYING OUT THE INVENTION

The radio zone display according to the first aspect of the present invention comprises a radio zone detecting means for detecting the size of the radio zone covered by the radio base station, the detected size of the radio zone, and a preset radio base station. An area map display means for generating and displaying an area map in the radio zone based on the coordinates is provided.

【0012】

This makes it possible to visually and instantly understand the mutual positional relationship of the range covered by each base station (each radio zone).

【0013】

The radio zone display device according to the second aspect of the present invention includes a radio zone detecting means for detecting the size of the radio zone covered by the radio base station and a map information storage means for accumulating map information around the radio base station. And a display means for generating and displaying an area map in the radio zone based on the detected size of the radio zone and the map information.

【0014】

As a result, the mutual positional relationship of the range covered by each base station (each radio zone) can be visually and instantly understood including the map information of the area in charge of each radio zone.

【0015】

The radio zone display device according to the third aspect of the present invention acquires information on the radio zone detecting means for detecting the size of the radio zone covered by the radio base station and the number of mobile terminals accommodated in the radio base station. Moving using the number of mobile terminals information acquisition means, the map information storage means for accumulating map information around the wireless base station, the detected size of the wireless zone, the number of mobile terminals, and the map information. A display means for generating and displaying an area map for the radio zone including a diagram showing the distribution status of terminals is provided.

【0016】

As a result, how wide each wireless zone is, what kind of positional relationship there is with each other, what kind of area each zone covers, and how many mobile terminals are currently accommodated. , Can be grasped visually and instantly.

【0017】

In any one of the first to third aspects, the radio zone display device according to the fourth aspect of the present invention means that the radio zone detecting means of the radio zone is based on the transmission power of the pilot channel of the radio base station. Changed to detect the size.

【0018】

The pilot channel is a signal channel in which all 1 baseband signals (unmodulated signals) are simply spread-modulated in the downlink of the CDMA mobile communication system, and is constantly transmitted from each base station to be a mobile terminal (mobile station). ) Is used for synchronous acquisition and power control. Focusing on the fact that the spread of the wireless zone can be uniquely specified once the transmission power of this pilot channel is determined, it is used for the graphic display of the wireless zone.

【0019】

In the radio zone display method according to the fifth aspect of the present invention, the size of the radio zone of each radio base station is detected based on the transmission power of the pilot channel in each of the plurality of radio base stations, and the radio zone is set to the radio zone. The number of mobile terminals accommodated is detected, and on one screen, the boundary line of each wireless zone, information on the number of mobile terminals accommodated in each wireless zone, and a map of the area including the plurality of wireless base stations are displayed. Are superimposed and displayed.

【0020】

As a result, how wide each wireless zone is, what kind of positional relationship there is with each other, what kind of area each zone covers, and how many mobile terminals are currently accommodated. , Can be grasped visually and instantly.

【0021】

In the radio zone control method according to the sixth aspect of the present invention, the boundary line of each of the plurality of adjacent radio zones, the number of accommodated mobile terminals, and the radio zone are used by using the radio zone display device according to the third aspect. While superimposing and displaying a map including an area on the screen, the size of the plurality of radio zones is controlled so that a part of the traffic concentrated in one radio zone is processed in the adjacent radio zone.

【0022】

As a result, it becomes possible to efficiently realize a method in which a part of the concentrated traffic is distributed to the adjacent radio zones and the size of each radio zone is dynamically controlled.

【0023】

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. (Embodiment 1) FIG. 1 is a diagram showing an overall configuration of a mobile communication base station system using the wireless zone display device according to the first embodiment of the present invention.

【0024】

The base station control device 20 comprehensively controls a plurality of radio base stations 10a to 10d. The wireless zone display device 30 receives the information sent from the base station control device 20 and performs a predetermined process, and as shown in FIG. 2, each base station device 10a to 10d is displayed on one screen 36. The boundaries of the coverage range (wireless zone) 40 to 43 are displayed in an overlapping manner.

【0025】

The radio base station apparatus 10a includes an antenna 1, a transmission unit 11 for transmitting a radio signal, a reception unit 12, a call channel transmission / reception unit 13, a control channel transmission / reception unit 14, a pilot channel transmission unit 15, and a control unit 16. And a communication unit 17.

【0026】

In the above configuration, the transmission unit 11 modulates the transmission data of each channel and outputs the transmission data to the antenna 1. The receiving unit 12 demodulates the radio signal input and outputs the received data. The call channel transmission / reception unit 13, the control channel transmission / reception unit 14, and the pilot channel transmission unit 15 perform transmission and reception processing of the baseband signals of the call channel, the control channel, and the pilot channel, respectively. Further, the control unit 16 controls each functional unit constituting the radio base station. The communication unit 17 exchanges input / output signals of the transmission / reception units 13, 14 and 15 of various channel signals with the base station control device 20, or signals between the base station control unit 16 and the base station control device. Also convey. The radio base station devices 10b to 10d have the same configuration.

【0027】

The base station control device 20 includes a communication unit 21, a data conversion unit 22, and a communication unit 22. The communication unit 21 transmits the data of the communication channel and the signal to the base station control unit 16 between each radio base station 10 and the base station control device 20. Further, the data conversion unit 22 extracts the data to be sent to the wireless zone display device 30 from the data received from the communication unit 21, executes a predetermined conversion, and transmits the data to the communication unit 23. The wireless zone display device 30 includes a communication unit 31, a base station position information storage unit 32, a wireless zone calculation unit 33, an input unit 34, a display unit 35, and a display 36.

【0028】

The communication unit 31 is a communication unit that receives data from the base station control device 20. The base station position information storage unit 32 stores information on the geographical position of each radio base station (for example, information on the longitude and latitude of the place where each radio base station is installed). The radio zone calculation unit 33 calculates the actual size of the radio zone from the information received by the communication means 31 (that is, the transmission power value data of the pilot channel in each radio base station). Further, the display unit 35 creates a figure representing the radio zone based on the size of the radio zone calculated by the radio zone calculation unit, centering on the position of the base station based on the information of the base station position information storage unit. , The position of the base station and the radio zone are superimposed and displayed.

【0029】

The operation of the mobile communication system including the wireless zone display device having the above configuration will be described. The control unit 16 in the radio base station 10a (10b to 10d) controls the transmission power by designating the pilot channel transmission power value Pb for the pilot channel transmission unit 15. This transmission power value Pb is constantly changed in order to change the size of the radio zone by traffic. The communication unit 17 notifies the base station controller 20 of the transmission power value Pb of each pilot channel.

【0030】

On the other hand, the base station control device 20 receives the transmission power value of each pilot channel from each of the radio base stations 10a to 10d by the communication means 21. The data conversion means 22 converts or combines the data received from the communication means 21, and transmits the data to the wireless zone display device 30 by the communication means 23. Transmission may be periodic or only when the transmission power value of the radio base station changes.

【0031】

The radio zone display device 30 receives the transmission power value Pb of each pilot channel of the plurality of radio base stations from the base station control device 20 by the communication unit 31. The radio zone calculation unit 33 calculates the size of the radio zone from the transmission power value Pb received by the communication unit 31.

【0032】

The calculation method is calculated using, for example, the approximate equation (Equation (1)) of the radio wave propagation equation shown below. Pm (dB) = Pb-A log (B r)^-^α) ......... (1) In Eq. (1), A, B, and α are constants determined by the frequency, antenna height, and location, and the accuracy can be improved by using the values obtained by measurement in the field where the target radio zone exists in advance. However, since it is difficult to measure in all service areas, the value obtained by measuring at a specific location is used as the representative value. Further, Pb is a transmission power value of the pilot channel from the radio base station (data transmitted from the radio base stations 10a to 10d via the communication unit 17) as described above. In addition, Pm is the received power value at the mobile terminal.

【0033】

Here, assuming that the minimum received power level at which the pilot channel transmitted from the radio base station can be demodulated in the mobile terminal is Pmin, the radio zone is the area of radius r obtained by solving the following equation (2). Become. Pmin Pb-A log (B r)^-^α)............(2) 【0034】

The display unit 35 of the wireless zone display device 30 uses the position information (longitude, latitude, etc.) of each base station stored in the base station position information storage means 32, and the wireless zone calculation means centering on the base station. The radio zone is drawn according to the size (radius r) of the radio zone calculated in 33. FIG. 2 shows an example of drawing a radio zone.

【0035】

As described above, according to the system of the present embodiment, the size of each radio zone is graphically displayed based on the current transmission power value of each radio base station, so that the overlapping condition and the dead zone of each radio zone are displayed. Can be easily confirmed.

【0036】

Therefore, because traffic is concentrated on one of the radio base stations shown in FIG. 2, the radio zone of that base station is reduced, while the radio zone of another adjacent base station with relatively low traffic is expanded. When performing control to disperse traffic, the operator can efficiently perform appropriate control by recognizing the current size of the wireless zone in real time while observing the screen of the wireless zone display device 30.

【0037】

(Embodiment 2) FIG. 3 is a diagram showing an overall configuration of a system including a radio zone display device according to the second embodiment of the present invention. In the system of FIG. 3, the same parts as those of the system of FIG. 1 are designated by the same reference numerals. The basic configuration of the system of FIG. 3 is almost the same as that of FIG. 1, except that the map information storage unit 37 is added to the wireless zone display device 30.

【0038】

The map information storage unit 37 is map information stored in, for example, a CD-ROM or a DVD-ROM used in an automobile navigation device.

【0039】

The display unit 35 in the wireless zone display device 30 uses the position information (longitudinal, latitude, etc.) of each base station stored in the base station position information storage means 32, and the wireless zone calculation means centering on the base station. The radio zone is drawn according to the size (radius r) of the radio zone calculated in 33, and the information stored in the map information storage unit 37 is combined with the longitude / latitude of the base station installation position and the position of the map information content. And display.

【0040】

FIG. 4 shows an example of drawing a radio zone. Since the map is in the background, the specific areas covered by each wireless zone can be grasped at a glance, further improving convenience. As described above, according to the present embodiment, since the current spread of the radio zone of each radio base station is displayed together with the map, the overlapping condition and the dead zone of each radio zone can be easily displayed on the map in real time. It becomes possible to confirm.

【0041】

(Embodiment 3) FIG. 5 is a diagram showing an overall configuration of a system including a radio zone display device according to the third embodiment of the present invention.

【0042】

The basic configuration of the system of FIG. 5 is almost the same as that of the above-described embodiment, but the point that the control unit 24 is provided in the base station device 20 and the information on the number of mobile terminals possessed by the control unit 24. Is sent to the wireless zone display device 30 via the communication unit 23, and the wireless zone display device 30 is different in that it uses this information to perform more effective wireless zone display.

【0043】

In the base station control device 30, the control unit 24 functions to control various base stations via the communication unit 21. The base station control also includes instructions for allocating various channels, and therefore, the control unit 24 manages the number of mobile terminals currently accommodated in each radio base station 10.

【0044】

The characteristic operation of the mobile communication system including the wireless zone display device configured as described above will be described.

【0045】

First, in the base station control device 20, the data conversion unit 22 converts the data received from the communication unit 21 and combines the data of the current number of accommodated mobile terminals for each radio base station in the base station control device control unit 24. Is transmitted to the wireless zone display device 30 via the communication unit 23. This transmission may be performed periodically, or may be performed only when the transmission power value of the radio base station and the number of accommodated mobile terminals change.

【0046】

On the other hand, the display unit 35 in the wireless zone display device 30 uses the position information (longitudinal, latitude, etc.) of each base station stored in the base station position information storage unit 32, and wirelessly centers on the base station. The radio zone is drawn according to the size (radius r) of the radio zone calculated by the zone calculation unit 33, and the information stored in the map information storage unit 37 is the longitude / latitude of the base station installation position and the contents of the map information. Align and display. At this time, the wireless zones are colored and displayed so that the traffic amount can be known according to the number of accommodated mobile terminals for each wireless base station received from the communication unit 31.

【0047】

FIG. 6 is an example of drawing a radio zone. In this example, the radio zones 40 to 42 having a small amount of traffic are not colored in the circle of the radio zone drawing, and only the radio zone 43 having a large amount of traffic is painted with a dark color (for example, red).

【0048】

In this example, the display color is changed according to the traffic amount, but the shade in the radio zone may be changed depending on the traffic amount. Needless to say, even when the colors are changed, a plurality of colors may be displayed, such as light red when there is a lot of traffic, yellow when there is a lot of traffic, and blue when there is little traffic. Further, the value of the actual number of accommodated terminals and the accommodating rate (%) with respect to the maximum accommodating number of wireless base stations may be displayed as they are on the screen.

【0049】

As described above, according to the present embodiment, in order to graphically display the current size of the radio zone of each radio base station together with useful information, the overlapping condition and the dead zone of each radio zone can be displayed in real time. It can be easily confirmed on the map, and the actual traffic amount is also displayed. Therefore, there is an advantage that the traffic fluctuation can be visually known and the examination and verification of the control method of the width of the radio zone can be facilitated.

【0050】

In the above embodiment, the wireless zone display device is provided independently, but in an actual mobile communication system, it serves as a barrier to a base station control station that controls a plurality of base stations and a fixed telephone network. The exchange control station may be equipped with the same function. In that case, a wired line or the like becomes common, which has the advantage that the device can be downsized and the position information of the base station can be collectively managed.

【0051】

Further, although the radio zone calculation unit 33 uses the propagation approximation formula (1), a formula for improving the accuracy, for example, the Okumura-Hata formula may be used. Further, in order to improve the speed of the calculation process, it is also effective to take a method of actually measuring in advance and giving the transmission power value and the actual size of the radio zone in a table format in advance.

【0052】

Further, in the first embodiment, the transmission power value of the pilot channel is collected from the radio base station by the communication unit, but when the base station control device control unit 24 of the base station control device 20 manages the value, the value is collected. Needless to say, it is not necessary to transmit from the radio base station 10 by using it.

【0053】

[Effect of the invention]

As described above, according to the present invention, there is an excellent wireless zone display device and method capable of visually confirming the size and position of wireless zones, the degree of overlap of a plurality of wireless zones, and the amount of traffic in real time. realizable.

[Simple explanation of drawings]

[Figure 1]

Block diagram of a mobile communication system including the wireless zone display device according to the first embodiment of the present invention. [Figure 2]

The figure which shows the display example of the wireless zone display device which concerns on Embodiment 1. [Fig. 3]

Block diagram of a mobile communication system including a wireless zone display device according to a second embodiment of the present invention. [Fig. 4]

The figure which shows the display example of the wireless zone display device which concerns on Embodiment 2. [Fig. 5]

Block diagram of a mobile communication system including a wireless zone display device according to a third embodiment of the present invention. [Fig. 6]

The figure which shows the display example of the wireless zone display device which concerns on Embodiment 3. [Explanation of symbols]

10a ~ 10d wireless base station 11 Transmitter 12 Receiver 13 Communication channel transmitter / receiver 14 Control channel transmitter / receiver 15 Pilot channel transmitter 16 Base station control unit 17 Communication Department 20 Base station controller 21 Communication Department 22 Data conversion unit 23 Communication Department 24 Control unit 30 Wireless zone display 31 Communication Department 32 Base station location information storage unit 33 Wireless zone calculation unit 34 Input section 35 Display 36 display 37 Map Information Storage Department