JP2007235831A - Method for arranging base station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine a suitable base station arrangement pattern by considering the total quantity of resources to be used or by determining an arrangement density of radio devices based on the number of radio devices and an evaluation quantity regarding the quantity of resources to be used. <P>SOLUTION: An arrangement pattern of several or many base stations in the same area is estimated for the same area (step S11) and regarding each of the estimated patterns, a power (radiation power) amount of a base station capable of covering the same area is then calculated (step S12). The total of radiation power amounts of the base stations is determined (step S13). If there are restriction conditions, within the restriction conditions, the arrangement pattern of the minimum radiation power amount is selected and the suitable base station arrangement pattern is determined (step S14). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a base station arrangement method suitable for use in a base station or a wireless transmission aggregation device of an access point or a wireless communication system that performs communication using a wireless device.

  In the communication system described above, as part of network evaluation, calculation of the total amount of resources used in radio transmission using base stations and access points in a predetermined area, or the number of base stations and access points and the amount of resources used An appropriate installation density of the wireless device is derived based on the evaluation amount.

  In such a calculation method for the total amount of resources used or the method for deriving the appropriate installation density of wireless devices, the amount of used resources is calculated based on the distance between the individual wireless devices, and the amount of used resources of each wireless device is calculated. There are many methods for reducing the size, and a method of reducing the amount mainly using the total amount is not considered. In many cases, the number of base stations or access points is determined mainly by limiting the number of wireless devices that can communicate within the cell of the base station or access point. If an appropriate installation density is calculated based on the total amount of resources used, complicated means are required, and it is not easy to determine an appropriate arrangement of base stations.

For example, in Japanese Patent Application Laid-Open No. 2004-241799, in order to estimate in advance the location of a radio base station that can communicate with many radio terminal stations, depending on the situation of the area where the radio base station is actually arranged, At each point of the radio cell formed by the radio base station, the presence / absence of all the radio base stations existing in the vicinity is calculated based on the terrain data and the height data, and is viewed with at least one radio base station. A wireless base station arrangement method for calculating the position of a wireless base station at a certain point is disclosed.
JP 2004-241799 A

  In the arrangement method of the conventional radio base station including the above-mentioned Patent Document 1, in order to calculate the use resource amount based on the distance between the individual radio devices and try to reduce the use resource amount of each radio device, Evaluation quantities based on the total amount of resources used are not considered. That is, there is a problem that it is not considered to reduce the total amount of resources used by the total wireless devices in the area.

  In many cases, the number is determined mainly by limiting the number of wireless devices that can communicate within a base station or access point, and even if there is an evaluation amount due to the number of wireless devices or the amount of resources used, at most wireless The density of the wireless device is obtained mainly based on the evaluation amount resulting from the number of devices. Therefore, there is a problem that an appropriate base station arrangement pattern cannot be obtained because the evaluation amount often becomes inappropriate at the obtained density.

  The present invention has been made based on the above circumstances, considering the total amount of used resources, or obtaining the arrangement density of wireless devices based on the evaluation amount related to the number of wireless devices and the amount of used resources, and determining an appropriate base station arrangement pattern. It is an object to provide a base station arrangement method that can be determined.

  In order to solve the above-described problem, the present invention relates to a method for determining the arrangement of base stations in a certain area, determining the arrangement of the base stations based on the resources of all the base stations arranged in the area. Features.

  In addition, the present invention is a base station arrangement method used in a base station, a wireless transmission aggregation device of an access point, or a wireless communication system that performs communication using a wireless device, and includes other wireless devices included in a predetermined distance range. A device is included in a cell group in which a radio signal can be reached from the transmission aggregation device or the radio device, and the other radio device included in a plurality of the predetermined distance ranges around the transmission aggregation device or the radio device. On the other hand, the distance between the other wireless device included between two concentric circles having different radii and the transmission aggregation device or the wireless device is replaced with a concentric radius outside or inside the other wireless device. The arrangement of stations is determined.

  Further, the present invention is the above-described invention, wherein the wireless devices are arranged in lattice points in the predetermined area, the cell radii of the wireless devices are all equal, and the predetermined area is covered by the cells without a gap. It is characterized by determining that the state corresponds to the arrangement of the densest wireless devices required and determining the arrangement of the base stations.

  According to the present invention, in the above-described invention, a value indicating a linear distance between the radio apparatus and another radio apparatus by a rational multiple of a cell radius of the radio apparatus is defined as the radio apparatus and the other radio apparatus. An arrangement of the base station is determined as a wireless signal reachable distance to the apparatus.

  According to the present invention, in the above-described invention, a total amount of radio resources possessed by the other radio device in a predetermined area used for communication between the radio device and the other radio device is determined from the radio device. Calculating the product of the number of the other wireless devices at the same distance and the wireless resource by adding or integrating the same distance to a multiple of the cell radius of the wireless device to determine the arrangement of the base stations It is characterized by.

  Further, the present invention provides the wireless device according to the invention described above, wherein the wireless device is applied to a state where the distribution of other wireless devices communicating with the wireless device is replaced with a constant density distribution or distributed at a constant density. The number of other wireless devices that are equidistant from each other is indicated by an amount that depends on the distance, and the distance from the wireless device is used as one factor to multiply the amount of wireless resources used by the other wireless device and the dependency amount. Then, the total amount of wireless resources used in the other wireless device equidistant from the wireless device is indicated by an amount depending on the distance of the other wireless device included in the same area, and the addition or integration is performed with respect to the distance. As a result, the total amount of radio resources used in an arbitrary range from the radio device in the area is indicated by an amount depending on the distance of other radio apparatuses included in the same area, and the arrangement of the base stations is determined. Characterized in that it.

  Further, the present invention provides the above-described invention, wherein (1) the wireless device and another wireless device communicate directly or via a relay device, and (2) relay as a part of the other wireless device. When relaying is possible by a device, when relaying is repeated to aggregate transmission by wireless even when the number of wireless devices is small, (3) if one or more wireless devices are excluded within a predetermined area, the relaying Even if another wireless device that cannot be transmitted to any wireless device occurs without using the device, transmission is possible using the relay device, or the cell radius of the wireless device and the other wireless device When the cell radii are equal or within a predetermined range, when one or more of the three conditions (1), (2), and (3) is satisfied, when transmitting from the other wireless device to the wireless device And the interruption device The minimum value of the number of relay devices intervening for each of the other wireless devices, which can be transmitted by relaying, is calculated, the maximum value among the minimum values for all the other wireless devices, and within the predetermined area The total amount of wireless resources used in the other wireless device is shown by using the relationship with the density of the wireless device in FIG.

  Further, the present invention provides a wireless transmission aggregation device of a base station or an access point, or a wireless communication system that performs communication using a wireless device, wherein the wireless device and another wireless device are directly or via a relay device. Communication, or when relaying is possible by a relay device as a part of another wireless device, repeating relay is used to aggregate transmission by wireless even when the number of wireless devices is small A wireless resource used by the relay device in the predetermined area with respect to an evaluation amount having a wireless resource amount used by the other wireless device as one factor or an evaluation amount having the wireless device as a factor The arrangement of the base stations is determined by comparing the evaluation amount with respect to the total amount and the evaluation amount with respect to the total number of the wireless devices in the predetermined area.

  Further, the present invention is the above-described invention, wherein the wireless device communicates directly or via a relay device, or when relaying is possible by a relay device as a part of another wireless device. It is a case where the wireless transmission can be aggregated even when the number of wireless devices is small by repeatedly using relay, and the amount of wireless resources used in the other wireless devices is one factor, or the wireless With respect to the evaluation amount with the device as one factor, the upper limit of the amount of radio resources used is set in the other radio device, and when the resource amount reaches the upper limit value, the evaluation amount of the other radio device is predetermined. It is characterized by increasing to the value of.

  According to the present invention, a method for determining the arrangement of base stations in a certain area considers the total amount of resources used by determining the arrangement of base stations based on the resources of all base stations arranged in a certain area. Alternatively, it is possible to obtain the arrangement density of wireless devices based on the evaluation amount related to the number of wireless devices and the amount of resources used, thereby determining an appropriate base station arrangement pattern.

FIG. 1 is a flowchart cited for explaining each step of the base station arrangement method according to the present invention, and FIG. 2 is a diagram cited for explaining a specific example of each step.
Here, with reference to FIG. 1 and FIG. 2, each process in the base station arrangement method of the present invention will be outlined. First, an arrangement pattern of several or many base stations is assumed for the same area (step S11). Here, three patterns are assumed in order from the top: an arrangement pattern consisting of four base stations, an arrangement pattern consisting of five base stations, and an arrangement pattern consisting of two base stations. The base station arrangement pattern may be generated either automatically by a computer or manually.

Next, for the prepared arrangement pattern, the amount of power of the base station such as radiated power that can cover the same region is calculated (step S12), and the total amount of radiated power of each base station is obtained (step S13). Here, the total radiated power of the four base stations is P1, the total radiated power amount of the five base stations is P2, and the total radiated power amount of the two base stations is P3. In this range, an arrangement pattern having the smallest radiated power amount, for example, an arrangement pattern composed of five base stations having the total radiated power amount P2 is selected and finished (step S14).
As described above, resources are effectively utilized by determining an appropriate base station arrangement pattern based on resources of all base stations arranged in a certain area, here, radiated power.

3 to 11 are diagrams cited for explaining a specific procedure of the base station arrangement method according to the embodiment of the present invention. The present invention is applied to a base station or a wireless transmission aggregation device of an access point, or a wireless communication system that performs communication using a wireless device.
Hereinafter, specific procedures of the base station arrangement method according to the embodiment of the present invention will be described in detail with reference to FIGS.

(Embodiment 1)
FIG. 3 is an operation concept diagram showing Embodiment 1 of the present invention. Here, wireless devices P1, P2, and P3 are assigned to a certain area (shown in a diagram in which the target area is prompted as a plane, and hereinafter referred to as a plane that is prompted as a plane). It is assumed that a radio signal v1 is radiated from P1 with a predetermined attenuation.
By radiating v1, the radio resource m1 such as the electromagnetic radiation power that can be used by the radio device P1 is reduced. As a result, the radio device P2 whose v1 intensity is greater than or equal to a predetermined value vc depending on the location is indicated by the signal. Can be received. Also, the wireless device P3 whose v1 intensity is equal to or less than the predetermined value vc cannot receive the signal. Here, the range in which the intensity is equal to or greater than the predetermined value vc indicates the range of the distance lo from the wireless device P1 (shaded portion in the figure).

Further, the distance between the wireless device P2 and the wireless device P4 that are different from each other from the wireless device P1 is defined as two concentric circles centered on the wireless device P1 (or the circle has a shape that can be handled as a circle). However, the distances P1-P2 and P1-P4 between the wireless devices are both replaced with li or lo by replacing with the inner or outer radius. The
It should be noted that whether the inner side or the outer side is replaced is constant regardless of the target wireless device.

(Embodiment 2)
FIG. 4 is an operation conceptual diagram according to Embodiment 2 of the present invention. Here, as shown in FIG. 4A, the wireless devices P1 to P9 are located on grid points in a certain area, and the wireless devices P1 to P9 are base stations (or access points or other wireless devices). In such a case, the signal strength sensed at the position of a certain area is predetermined in each base station P1 to P9. The range (v3 ≧ vc) that can exist above the value vc is in the range of circles C1 to C9 that are equidistant from the base stations P1 to P9.

  When the radii of the circles C1 to C9 are equal, as shown in FIG. 4B, the base stations P1 to P9 are shaded so that the signal intensity at the position on the area may exist at a predetermined value vc or more. It represents that the area Aa is equal to the base stations P1 to P9.

  Here, if the predetermined area is the area Ab in the diamond frame in FIG. 4B, the positions of the base stations in the range where the signal intensity can exist at a predetermined value or more in the entire Ab are shown in FIG. The base stations P1 to P9 are shown, and the radius of a circle indicating the range in which the signal strength of the position on the region can exist at a predetermined value vc or more by each base station P1 to P9 is equal for all base stations in the Ab. In addition, the minimum distance at which the signal intensity can exist at a predetermined value or higher in the entire Ab is considered to be equal to ld.

5A and 5B, if the predetermined area shown in FIG. 4A is defined as an area obtained by enlarging (reducing) the area Ab within the thick frame in FIG. Is located in a position where the signal intensity can be greater than or equal to a predetermined value in the entire Ab, and the distance ld from the base station P5 is the minimum distance used in the description of FIG. 4B. .
Here, since the circles Ci and C0 are the minimum distance ld, the two closest distances among the distances obtained by multiplying the distance lx between the base station P5 and some other wireless device Px by the ratio α in ld are li, Alternatively, it is ld. Here, the minimum distance ld is replaced with either li or lo. Whether to replace the inside or the outside is constant regardless of the base stations P1 to P9.
In the above description, the other radio apparatus Px is distinguished from the base station P5, but this assumes a radio apparatus or a mobile radio terminal whose position is not fixed.

(Embodiment 3)
FIG. 6 is an operation conceptual diagram according to Embodiment 3 of the present invention. Here, when there is no region where the signal strength v1 at each position on the region is greater than or equal to the predetermined value vc by the base station P1 (FIG. 6A), v1 has a certain value and the distance indicating the range is ls. A case (FIG. 6B) and a case where v1 is larger than the value of FIG. 6B and the distance indicating the range is 11 (FIG. 6C) are shown. Further, the usage amount of the radio resource m1 of the base station P1 is not the example shown in FIG. 6A, but in the example shown in FIG. 6C, it is larger than the example shown in FIG. 6B. To do.

FIG. 7 shows other wireless devices equidistant from the base station P1 as Px1 to Pz1, and the other wireless devices Py1 indicated by the distance ly1 are within the range in which the signal strength at each position in the region is equal to or higher than a predetermined value. The case where the station P1 is included is shown.
By causing Py1 to have a signal strength equal to or greater than a predetermined value at each position in the range of the area, only the wireless resource m1 is used, and the wireless devices Px1 and Pz1 are also in the same state, and the total md1 Only x3 (= mD1) is used. When taking a plurality of different values li2 and li3 including the distance l1, n1 = 3 other wireless devices for the distance l1, n2 other wireless devices for the distance l2, and n3 for the distance l3. The other wireless devices exist, and the wireless resource usage totals mD2 and mD3 exist for l2 and l3.

  At this time, the total amount of radio resources used in the other radio apparatus shown in FIG. 7 is expressed by the following arithmetic expression.

  In the above arithmetic expression, i is an arbitrary value, i is a rational number, and the distance from the base station P1 is continuously equal to the distance from the base station P1, as shown by the following arithmetic expression. You may obtain | require the total usage-amount of radio | wireless resources.

  In FIG. 7, N2 and N3 indicate the number of wireless devices on the circumference, and n (letters, numbers, or symbols) indicates the number of wireless devices in the area.

(Embodiment 4)
FIG. 8 is an operation conceptual diagram according to Embodiment 4 of the present invention. Here, a state in which the distribution density of other wireless devices is non-uniform (FIG. 8A) is replaced with a uniform (FIG. 8B) state.
Here, the number of other wireless devices having the same distance from the base station P1 (li and 2 × li) is an amount (n (li)) and n (2 × li) depending on the distance from the base station P1. Yes, it is calculated by the following arithmetic expression. That is, the amount of wireless resources used by other wireless devices due to the distance from the base station P1 (m1 (li) and m1 (2 × li)) is multiplied by the dependency amount, and the distance from the base station P1 7 is added or integrated as described with reference to FIG. 7, so that the total amount (mDA) of wireless resources used in a predetermined area with respect to an arbitrary range from the base station P1 depends on the distance from the base station P1. Can be expressed as the following equation.

(Embodiment 5)
FIG. 9 is an operation conceptual diagram according to the fifth embodiment of the present invention. Here, the other radio apparatuses Px and Py use only areas where the signal strengths are not less than a predetermined value (or other radio apparatuses are used as radio relay apparatuses), and signal transmission / reception with the base station is not possible (FIG. 9). (A)), and the other radio apparatus Px can transmit and receive signals to and from the base station P1 using the area of the other radio apparatus Px1 included in the same area of Px. As a result, signals can be transmitted to and received from the base station using the region where the signal strength is included in the region where the signal strength is greater than or equal to the predetermined value, and the same applies to Py (FIG. 9B). )).
Accordingly, there are cases where the other radio apparatus used between the other radio apparatus Px and the base station P1 is only Px1, and there are cases where Px2, Px3 and Px4 are used, and the minimum number of other radio apparatuses used is 1. (The base station also has P2, but the minimum value is also 1). Similarly, the other wireless device Py is 2, and the maximum value of the number of other wireless devices used for all other wireless devices is 2.

Further, if the area of the predetermined area Ac is set as a unit area, the density of the base stations (P1, P2) in Ac is 2 in FIGS. 9A and 9B, but FIG. ) Is 1, and the maximum number of intervening other wireless devices is 3.
9A and 9B show the amount of wireless resources used by other wireless devices in Ac when other wireless devices can reach the base station from other wireless devices using the minimum value. , (Mdx + mdy + mdy1 + mdy2 + mdx1 + md), and the minimum value is 2. Further, the usage amount of the wireless resource in FIG. 9C is (mdx + mdy + mdy1 + mdy2 + mdx1 + md + mdz), and the minimum value is 3. Here, the base station density is 2 and 1, respectively, and the relationship between the minimum value and the usage amount of the radio resource is shown as the relationship between the base station density and the usage amount of the radio resource.

(Embodiment 6)
FIG. 10 is an operation conceptual diagram according to Embodiment 6 of the present invention. Here, an evaluation amount E (mdi) caused by the amount of wireless resources used in other wireless devices, and an evaluation amount (may be cost) caused by the base station or the number thereof (Pj) Shows the relationship.
The evaluation amount is an amount that changes in a certain manner according to the amount of radio resources used or the number of base stations and the number of each type. This evaluation amount may be an evaluation amount of wireless resource usage (may be the cost corresponding to the power usage amount) and an evaluation amount of base station factor (base station cost or installation cost). ).
Specifically, in the process of reducing the density of the base station described in FIG. 9, the density is calculated by subtracting the difference between the evaluation amount of the base station factor based on the initial density and the evaluation amount of the base station factor when the density is reduced. The value obtained by adding the evaluation amount of the wireless resource usage factor when the value is reduced is the evaluation amount of the base station factor based on the initial density. The base station density is set to an appropriate base station density, or the density at which the sum of the evaluation amount of the wireless resource usage factor and the evaluation amount of the base station factor in the density is set to be an appropriate base station density.

(Embodiment 7)
FIG. 11 is an operation conceptual diagram according to Embodiment 7 of the present invention. Here, once a signal is radiated by radio waves, the radio resource usage is repeatedly emitted with mdu, and the evaluation amount E is 0 until the radio resource usage reaches the upper limit mdU, reaching mdU. Then, the evaluation amount E is increased by ED1, and when the value reaches mdU, the evaluation amount is increased by ED2 and is shown in a stepwise manner.
In addition, when other evaluation quantities exist and other evaluation quantities change when using other radio apparatuses or base stations, the total of other evaluation quantities for one use of other radio apparatuses or base stations is constant. When a limiting condition that must be greater than or less than the value is given, a determination as to whether or not the other evaluation amount is within the limit may be added to the process of deriving an appropriate base station density.

  For example, the initial state is when the range where the signal strength of the wireless device is greater than or equal to a certain value within a predetermined area is radius C, and the base station is located at a position on a lattice point with a constant density D and an interval √2 × C. This state is regarded as equivalent to the state in which the number of base stations is the smallest, in which all other wireless devices reach the base station without intervention, and the present invention for the case where the number of base stations is reduced and the density is reduced. One application method is shown.

  That is, the number of other wireless devices between a radius (α−1) × C where α is a positive integer and a circle of radius α × C is calculated. A region where the other wireless device is the transmission source and radiates the signal once, and the other wireless device outside the circle of radius α × C is the transmission source and the signal is emitted and the signal intensity is a certain value or more. If the signal is made to reach the base station using the other source wireless device within the network, the other source wireless device is interposed, so that radius (α−1) × C and radius α The value of the number of times of adding the number of times the other radio apparatus emits a signal between the circles of × C is calculated. Next, a result obtained by multiplying the value of the calculated number by the number of the other wireless devices and further multiplying the amount of wireless resource usage associated with one signal emission is obtained. Using the distance between the other radio apparatus and the base station as the radius of the outer circle, for the other radio apparatus of this radius, use the other radio apparatus included in the range in which the signal strength value from the base station to the other radio apparatus is a certain value or more. Then, the minimum number of the other wireless devices used when making the signal reachable to the base station is calculated. Next, the other wireless device serving as the transmission base point has the minimum value for each base station, but each transmission starting point other wireless device sets the minimum value among the minimum values to the transmission starting point and the like. Only the base station corresponding to the minimum number of wireless devices is transmitted by means including the other wireless device. The maximum value among the minimum number of transmission starting point other wireless devices to be transmitted to the base station is set as the maximum number of the minimum number of transmitting starting point other wireless devices for the base station. Finally, the multiplication result is added while changing α from 1 to the maximum number for each base station.

  The farthest other wireless device that radiates a signal to each base station is the other wireless device having the maximum value, and when the signal reaches the base station from any source other wireless device by the signal reachable means There is only one type of column of other wireless devices used in the system. Furthermore, it is assumed that only other wireless devices that are used intervening other than the other wireless device that is the starting point radiate the signal, and Z is (number of base stations in the initial state) / (number of base stations after the number of base stations is reduced) Then, the total amount of radio resource usage can be easily calculated by the following arithmetic expression.

  Here, f (C) is the radio resource usage of one other radio apparatus in the circle with the radius C, and indicates that the distance from the base station is a factor. An evaluation amount based on the wireless resource usage amount is obtained according to how many times the wireless resource usage amount is higher than the upper limit. By reducing the number of base stations, the radio resource usage factor evaluation amount increases.

Next, since the evaluation amount due to the base station decreases by reducing the number of base stations, the value of Z that makes the wireless resource usage factor evaluation amount closest to the decrease in the base station factor evaluation amount is set to And get the density of the base station.
When the density is reduced from the minimum base station density at which a signal can reach the base station without using any other wireless device other than the other wireless device from which the other wireless device is a signal source. In the range where the evaluation amount does not exceed the difference from the initial base station factor evaluation amount that increases due to a decrease in the number of base stations, other wireless devices in the region where the signal strength is a certain value or more are successively used. This is the minimum base station density that other wireless devices can send and receive signals to and from the base station. In addition, when using a wireless device, it is possible to obtain a more appropriate base station density by applying the determination of whether or not the other evaluation amount is within the limit range.

  As described above, in the present invention, in a situation where a base station or an access point exists in a certain area and resources are used for communication, a state where the predetermined area is entirely covered only by the effective cell range of the base station or the access point. Even if there is a wireless device in a position that is not covered by the cell of the base station or access point due to the presence of a wireless device or terminal capable of relaying, it can be connected to any base station or access point. If there is a state where all wireless devices can communicate with each other, the base station or the access point installation density that makes the evaluation amount appropriate based on the number of base stations and the amount of resources used by the wireless device can be easily derived as described above. Is what you want. Note that in the above-described FIGS. 1 and 2 and the description corresponding to the drawings, the base station may be a wireless device other than the base station.

  Further, according to the present invention, the total evaluation amount is kept below the initial value from the base station density at which all wireless devices can transmit and receive signals with the base station without using other wireless devices other than themselves, and (1) All by enabling all wireless devices to transmit and receive signals to and from the base station by using signal radiation with a signal intensity greater than a certain value by other wireless devices included in the signal radiation area where the signal strength is greater than a certain value. In the case where the number of base stations is reduced as much as possible while maintaining the state in which signal transmission / reception with the base station is possible, a significant effect can be obtained when (2) the total evaluation amount is reduced due to the reduction. Further, the maximum effect can be obtained when the smallest number of base stations is obtained under the above two conditions (1) and (2).

  Note that the base station described in the above-described embodiment of the present invention is a wireless device that exists at a fixed position at a certain time, and may exist at another position at another time. In addition, the objects and events indicated by the notation such as plane, region, point, straight line, circle, distance, time, period, time, quantity, value, etc. used in the description of the embodiment of the present invention described above are actually applied. In some cases, the above notation can be imitated, or it may be applied to all objects and events included in the prescribed range of objects and events indicated in the above notation. The signal emission by radio waves has been described as an example, or the example of the amount of resources has been described as the amount of power, but other examples may be used as long as resources are used by functions such as radiation, Transmission may be read as reception and applied to signal transmission in the reverse direction.

  Further, in the present invention and this embodiment, “arrangement” may include determining a position for arrangement or determining a positional relationship, and it is not essential that installation is actually involved. Since it is only necessary to determine a position, an arrangement pattern, a relative position, and a positional relationship that bring about an effect obtained by the invention and the present embodiment, it is not essential to determine an accurate position or a unique position.

It is the flowchart quoted in order to demonstrate each process of the base station arrangement | positioning method concerning this invention. In the flowchart shown in FIG. 1, it is the figure quoted in order to demonstrate the specific example of each process. It is an operation | movement conceptual diagram concerning Embodiment 1 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 2 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 2 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 3 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 3 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 4 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 5 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 6 of this invention. It is an operation | movement conceptual diagram concerning Embodiment 7 of this invention.

Explanation of symbols

P1 to P9, Px, Py, Pz, Px1, Px2, Px3, Px4, Py1, Py2, Pz1 ... base station, m1, my ... radio resources, md1, md2, md3, mdx, mdx1, mdy, mdy1, mdz ... wireless resource usage, mD1, mD2, mD3 ... total of wireless resource usage, mdu ... radio resource usage for one signal emission, mdU ... upper limit of radio resource usage, li, lo, ld, lx, ls, l1, l2, l3, ly1 ... circle radius, vc, v1, v3 ... signal strength, C1, C2, C3, C9, Co, Ci ... circle, Aa, Ab, Ac ... base station allocation area, E, ED1, ED2 ... Evaluation amount

Claims (9)

How to determine the location of base stations in a certain area
A base station arrangement method, wherein the base station arrangement is determined based on resources of all base stations arranged in the area. A base station or a wireless transmission aggregation device of an access point, or a base station arrangement method used in a wireless communication system that performs communication using a wireless device,
Other wireless devices included in a predetermined distance range are included in a cell group in which a wireless signal can be reached from the transmission aggregation device or the wireless device,
The other radio apparatus included between two concentric circles having different radii with respect to the other radio apparatus included in a plurality of the predetermined distance ranges around the transmission aggregation apparatus or the radio apparatus, and the transmission aggregation apparatus Alternatively, the base station arrangement method is characterized in that the arrangement of the base stations is determined by replacing the distance to the radio apparatus with a concentric radius outside or inside the other radio apparatus.   In the predetermined area, the wireless devices are arranged in lattice points, the cell radii of the wireless devices are all equal, and the predetermined area is covered by the cells without any gaps. The base station arrangement method according to claim 2, wherein the base station arrangement is determined as being equivalent to:   Arrangement of the base station as a radio signal reachable distance between the radio apparatus and the other radio apparatus using a value indicating a linear distance between the radio apparatus and another radio apparatus as a rational multiple of a cell radius of the radio apparatus The base station arrangement method according to claim 2, wherein the base station is determined. About the total amount of resources for radio possessed by the other radio device in a predetermined area used in communication between the radio device and the other radio device,
The product of the number of other wireless devices equidistant from the wireless device and the wireless resource is calculated by adding or integrating the equidistance to a multiple of the cell radius of the wireless device, and the arrangement of the base stations The base station arrangement method according to claim 2 or 4, wherein the base station is determined. Replacing the distribution of other wireless devices that communicate with the wireless device with a constant density distribution, or by applying the distribution to a state with a constant density, the number of the other wireless devices that are equidistant from the wireless device The amount depending on the distance is indicated, and the distance from the wireless device is multiplied by the dependency amount and the wireless resource amount used in the other wireless device as one factor,
The total amount of wireless resources used in the other wireless device equidistant from the wireless device is indicated by an amount depending on the distance of the other wireless device included in the same area,
By adding or integrating with respect to the distance, the total amount of wireless resources used in an arbitrary range from the wireless device in the region is indicated by an amount depending on the distance of another wireless device included in the same region, 6. The base station arrangement method according to claim 2, wherein the arrangement of the base stations is determined. (1) When the wireless device and another wireless device communicate directly or via a relay device, (2) When relaying is possible by a relay device as a part of the other wireless device, relay is used. If the wireless transmission is aggregated even when the number of wireless devices is small,
(3) If one or more wireless devices are excluded in a predetermined area, even if another wireless device that cannot be transmitted to any wireless device occurs without using the relay device, transmission is performed using the relay device. Or, if the cell radius of the wireless device and the cell radius of the other wireless device are equal or within a predetermined range,
When one or more of the three conditions (1), (2), and (3) are satisfied,
When transmitting from the other wireless device to the wireless device, the minimum value of the number of relay devices interposed for each of the other wireless devices, which can be transmitted by relaying the interruption device, is calculated, The radio used by the other radio apparatus using the relationship between the maximum value of the minimum values for the other radio apparatus and the density of the radio apparatus in the predetermined area, with the density of the radio apparatus as one factor. The base station arrangement method according to any one of claims 2 to 6, wherein a total amount of resources for use is indicated. A base station or a wireless transmission aggregation device of an access point, or a base station arrangement method used in a wireless communication system that performs communication using a wireless device,
When the wireless device and another wireless device communicate directly or through a relay device, or when relaying is possible by a relay device as a part of the other wireless device, the wireless device is repeatedly used by repeating the wireless communication. When the wireless transmission is aggregated even when the number of devices is small, the amount of wireless resources used by the other wireless device is one factor, or the evaluation amount is that the wireless device is one factor ,
Determining the arrangement of the base stations by comparing an evaluation amount with respect to a total amount of radio resources used by the relay device in the predetermined area and an evaluation amount with respect to the total number of the radio devices in the predetermined area; A base station arrangement method characterized by the above. When the wireless device communicates directly or via a relay device, or when relaying is possible by a relay device as a part of another wireless device, the number of the wireless devices is small by repeatedly using relay. The wireless transmission can be aggregated even in a state,
Regarding the amount of wireless resources used in the other wireless device as one factor, or the evaluation amount having the wireless device as one factor,
The radio resource amount used for the other radio device is provided with an upper limit, and when the resource amount reaches the upper limit value, the evaluation amount of the other radio device is increased to a predetermined value. Item 9. The base station arrangement method according to Item 8.

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