JP2003018648A - Wireless data communication system, wireless data communication method, and program therefor - Google Patents

Abstract

(57) [Summary] [Problem] To respond to changes in the distribution of mobile stations and traffic,
Provided are a wireless data communication system, a wireless data communication method, and a program for performing a wireless data communication service maintaining a priority relationship. A communication control processing unit controls communication quality with a mobile station using priority coefficients corresponding to a plurality of priorities. The priority coefficient reception processing unit 24 receives a priority coefficient used by a surrounding base station in a sharing range that shares a communication range with a surrounding base station. The mobile station distribution detection processing unit 25 detects a distribution of mobile stations for each priority existing in each shared range. The priority coefficient determination processing unit 26 determines a priority coefficient to be used by the own station based on the priority coefficients received from the surrounding base stations and the distribution status of the mobile stations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless data communication system including a mobile station and a plurality of base stations for wireless data communication, a wireless data communication method, and a program therefor.

[0002]

2. Description of the Related Art Conventionally, since wireless data communication uses radio waves having a limited range of frequencies as a finite resource, effective utilization of frequencies is desired. However, by using wireless, the advantage is that data communication can be performed anytime and anywhere where radio waves can reach from the base station, but on the other hand, communication traffic tends to be biased depending on the place and time. Therefore, it is necessary to have a function that can absorb fluctuations in communication traffic in order to use the line without waste. For example, if there is a large amount of communication traffic using a buffer or the like that temporarily stores data to be transmitted wirelessly, A method of temporarily storing data in the buffer and transmitting the transmission data temporarily stored in the buffer when the amount of communication traffic decreases has been used.

Further, when handling data requiring immediacy, data that is not required to be immediacy is temporarily stored in a buffer and processed by adding a priority for giving priority to data requiring immediacy. Further, as one of various services, it has been performed that a contract including a priority order is exchanged with a user and a frequency use band at the time of communication and a communication delay are guaranteed according to the priority order. In this case, each base station determines the frequency usage band to be assigned to each priority, and frequency usage that is advantageous to users who have made a high priority contract (high communication speed, easy connection, etc.) Bandwidth was being allocated.

However, when the frequency allocation is fixed, a mobile station with a lower priority can perform more advantageous communication depending on the degree of deviation in the distribution of mobile stations according to priority. Therefore, a method of timely updating the allocation of the frequency use band for each priority order according to the distribution of mobile stations by priority order has been considered.

[0005]

As described above, in each conventional base station, the allocation of the frequency use band used for each priority order is updated according to the distribution of the mobile stations for each priority order and the change in the communication amount. It was However, if there is a biased distribution of mobile stations by priority in each base station, mobile stations with lower priorities may be able to perform more advantageous communication depending on the location. There was a problem that a communication service that kept the same could not be done.

[0006] Further, if the allocation of the frequency use band is determined for each base station as described above and an attempt is made to provide a wireless data communication service that maintains a relationship of a certain degree of priority, overall network efficiency will drop. There was a problem that sometimes. In addition, in order to provide a wireless data communication service with priority by deciding the frequency band to be allocated to each base station as described above, a special device is often required, which increases the equipment cost. There was a problem of doing.

The present invention has been made in consideration of the above-mentioned circumstances, and responds to changes in the distribution of mobile stations and changes in communication volume, and provides a wireless data communication service that maintains a priority relationship, An object of the present invention is to provide a wireless data communication method and its program. Also,
An object of the present invention is to provide a wireless data communication system, a wireless data communication method, and a program therefor that provide a wireless data communication service that does not reduce network efficiency when providing a wireless data communication service that maintains the above priority relationship. . Further, a wireless data communication system, a wireless data communication method, and a program therefor, which do not require a special device when providing a wireless data communication service maintaining the above-mentioned priority relationship and further reduce the burden of equipment cost The purpose is to provide.

[0008]

The present invention has been made to solve the above-mentioned problems, and a wireless data communication system according to the present invention comprises a mobile station and a plurality of base stations for wireless data communication. In this wireless data communication system, each base station communicates with the mobile station at a communication quality based on a plurality of priorities, and therefore communication control is performed by using a priority coefficient corresponding to each priority. Means and a priority coefficient receiving means for receiving a priority coefficient used by the surrounding base stations in the shared range when there is one or a plurality of shared ranges that share a communicable range with the surrounding base stations. , Mobile station distribution detection means for detecting the distribution of priority-based mobile stations existing in each shared range, and communication from the local station based on the priority coefficient and mobile station distribution received from surrounding base stations Priority in range For maintaining the relationship, characterized by comprising a priority coefficient determining means for determining a priority coefficient used in the own station.

As a result, each base station of the wireless data communication system communicates with the mobile station at a communication quality based on a plurality of priorities, so that the communication quality is controlled using a priority coefficient corresponding to each priority. When there is one or a plurality of shared ranges that share a communicable range with the communication control means and surrounding base stations, priority coefficient reception for receiving a priority coefficient used by the surrounding base stations in the shared range. Means, mobile station distribution detection means for detecting the distribution of mobile stations by priority in each shared range, and communication from the local station based on the priority coefficient and mobile station distribution received from surrounding base stations. Since it has a priority coefficient determining means for determining the priority coefficient used in the own station in order to maintain the priority relationship in the possible range,
Even if the distribution of mobile stations of each priority is biased, the relationship of each priority can be maintained without being affected by the bias. That is, it is possible to perform wireless data communication with communication quality based on the priority while maintaining the relationship between the priorities.

The wireless data communication system according to the present invention is a wireless data communication system including a mobile station and a plurality of base stations for performing wireless data communication, each base station being based on a plurality of priorities. In order to communicate with the mobile station with the communication capacity, the communication control means for controlling the communication capacity using the priority coefficient corresponding to each priority, and one or a plurality of units sharing the communicable range with the surrounding base stations. When there is a shared range, priority coefficient receiving means for receiving a priority coefficient used by the surrounding base stations in the shared range, and a mobile station for detecting a distribution of mobile stations by priority existing in each shared range. Based on the distribution detecting means and the distribution of priority coefficients and mobile stations received from surrounding base stations, the priority coefficient used by the own station for maintaining the relationship of the priority in the range communicable from the own station is set. Priority to decide Characterized by comprising a coefficient determining means.

As a result, each base station receives the communication control means for controlling the communication capacity using the priority coefficient corresponding to each priority and the priority coefficient used by the surrounding base stations in the shared range. Priority coefficient receiving means, mobile station distribution detection means for detecting the distribution of mobile stations by priority existing in each shared range, based on the priority coefficient and mobile station distribution received from surrounding base stations, Since each base station is provided with a priority coefficient determining means for determining the priority coefficient used by the local station, each base station determines the communication capacity provided from the surrounding base stations in the range where the communicable range with the mobile station overlaps. It is possible to control the communication capacity of the own station in consideration and perform wireless data communication with the mobile station. In addition, the communication capacities assigned from the respective base stations to the mobile stations within the communicable range according to the priority maintain the relationship of the communication quality according to the priority. That is, by constructing a wireless data communication area by arranging base stations having such a shared area in a chain, priority relationships are maintained and priority levels that are less affected by the distribution of mobile stations. Relationships can be maintained throughout the area.

Further, in the wireless data communication system according to the present invention, each base station assigns to each priority a base station capacity control means for determining the base station capacity to be assigned for each priority based on the priority coefficient. When the base station capacity is insufficient, based on the base station capacity information of each base station obtained from the priority coefficient received from the surrounding base stations, the communication data is transferred to the surrounding base stations with a free base station capacity. It is characterized by further comprising a transfer rate calculating means for calculating a transfer rate which is a ratio, and a communication data transfer means for transferring to a surrounding base station having a free base station capacity based on the transfer rate.

As a result, for example, when the capacity assigned to a certain base station A is short of the capacity of the second base station, each base station can be obtained from the priority coefficient received from the base stations around the base station A. Based on the base station capacity information of, the base station B, which is a surrounding base station and has a free base station capacity, is detected. Next, a transfer rate, which is a rate of transferring the communication data to the base station B, is calculated in consideration of the second priority of the mobile station receiving the communication data, and the base station B is calculated based on the transfer rate. Communication data can be transferred to.

Further, in the wireless data communication system according to the present invention, the wireless data communication system performs communication using a packet multiple access method in which a communication signal is made into a plurality of packet data and the packet data includes connection control information. In this case, the communication control means controls the number of communication packets per unit time in communication with the mobile station using the priority coefficient, and the communication data transfer means transfers the packet data. Thereby, the communication control means controls the number of communication packets per unit time in the communication with the mobile station using the priority coefficient based on the priority information, and the communication data transfer means uses the packet data as the communication data. Since the transfer is performed, it is possible to perform the wireless data communication with the priority maintained by using the communication method based on the packet multiple access method.

The wireless data communication system according to the present invention further comprises a wireless server for collectively managing a plurality of base stations, each base station further comprising a server communication means for communicating with the wireless server. The priority coefficient receiving means is characterized by receiving information regarding the priority coefficient being used by the surrounding base stations via the wireless server. Accordingly, each base station further includes a server communication unit that communicates with a wireless server that collectively manages a plurality of base stations, and the priority coefficient receiving unit is in use by surrounding base stations via the wireless server. Since we receive information about the priority factor of
The wireless server can manage the priority coefficient.

Further, the wireless data communication system according to the present invention further comprises a wireless server for collectively managing a plurality of base stations, and each base station further comprises a server communication means for communicating with the wireless server. When the base stations in the communicable range with the station are connected by the wired communication network, the wireless server determines the distribution route of the packet to the mobile station.
It is characterized by comprising a distribution path control means for controlling by transferring to the communication data transfer means. Accordingly, the wireless server further includes a wireless server that collectively manages a plurality of base stations, each base station further includes a server communication unit that communicates with the wireless server, and the wireless server provides a distribution route of packets to the mobile station. , Because it is transferred to the communication data transfer means,
The wireless server can control the communication data transfer between the base stations and can provide a more efficient wireless data communication system.

Further, the wireless data communication system according to the present invention further comprises a management server for collectively managing a plurality of base stations, and each of the base stations has a server communication means for communicating with the management server via a network. Further, the management server transfers the packet distribution route to the mobile station to the communication data transfer means when the base stations connected to each other by the wired communication network have a communicable range overlapping with the mobile station. It is characterized by comprising a distribution route control means for controlling by this. As a result, a management server that collectively manages a plurality of base stations is further provided, and each of the base stations further includes a server communication unit that communicates with the management server via a network, and is within a communicable range of the mobile station. When the overlapping base stations are connected by the wired communication network, the management server controls the distribution route of the packet to the mobile station by transferring it to the communication data transfer means. It is possible to control communication data transfer between the wireless communication systems and provide a more efficient wireless data communication system.

In the wireless data communication system according to the present invention, the communication data transfer means is a router. Accordingly, since the communication data transfer means is a router, when the communication traffic of the router of a certain base station is large, the function of the router can transfer the communication data to the router having the base station with the free communication traffic.

Further, in the wireless data communication system according to the present invention, the magnitude relation of the priorities is according to the priority order, and the priority order is determined by the contract fee with the user of the mobile station. As a result, the priority order is determined by the contract fee with the user of the mobile station, so that the high-priority user who has a high contract fee will be provided with the wireless data communication service having a higher communication quality than the low-priority user. Can be provided.

Further, in the wireless data communication system according to the present invention, the magnitude relation of the priorities is according to the priority order, and the priority order is determined by the application being used by the mobile station. This gives priority to
Since it is determined by the application being used by the mobile station, the wireless data communication service can be preferentially provided to the application requiring higher communication quality.

The wireless data communication method according to the present invention is a wireless data communication method using a wireless data communication system including a mobile station and a plurality of base stations for performing wireless data communication. In order to communicate with a mobile station with a communication quality based on a plurality of priorities, a step of controlling the communication quality using a priority coefficient corresponding to each priority, and a step of sharing a communicable range with surrounding base stations When there is one or a plurality of shared ranges, a step of receiving a priority coefficient used by the surrounding base stations in the shared range, and a step of detecting a distribution of mobile stations for each priority existing in each shared range , Based on the priority coefficient received from surrounding base stations and the distribution of mobile stations, determine the priority coefficient used by the local station to maintain the relationship of the priority within the communicable range from the local station. And having a step.

Further, the program according to the present invention is a program for a base station in a wireless data communication system having a plurality of base stations for performing wireless data communication with a mobile station, and has a communication quality based on a plurality of priorities. In order to communicate with the mobile station, the step of controlling the communication quality using the priority coefficient corresponding to each priority, and when there is one or more shared ranges that share the communicable range with the surrounding base stations. To
Receiving a priority coefficient used by the surrounding base stations in the shared range, detecting a distribution of mobile stations by priority existing in each shared range, and a priority coefficient received from the surrounding base stations And a step of deciding a priority coefficient used by the local station for maintaining the relationship of priorities in a range communicable from the local station based on the distribution of the mobile stations.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention described in the claims, and all of the combinations of features described in the embodiments are required for the solution means of the invention. Not necessarily. First, a wireless data communication system which is an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a wireless data communication system according to an embodiment of the present invention. In this figure, reference numerals 1, 2, and 3 are a base station A, a base station B, and a base station C for wireless data communication having communicable areas 1a, 2a, and 3a, respectively. As illustrated, areas 1a, 2a, 3a share overlapping areas 1a-1, 1a-2, 1a-3.
Also, the black dots in the areas 1a, 2a, 3a indicate mobile stations, and these mobile stations and the base station A.1, base station B.
2. The base station C.3 performs wireless data communication according to the priorities P1, P2, and P3, which are the priority order of P1>P2> P3. Here, in the area 1a-2 in FIG. 1, the mobile station 4 has the priority P1, the mobile station 5 has the priority P2, and the mobile station 6 has the priority P2.
Is a priority P3, and it is assumed that the user of each mobile station has a contract with a predetermined contract amount for wireless data communication with base station A.1, base station B.2, and base station C.3. .

The above-mentioned wireless data communication system provides a wireless data communication service with the communication quality that efficiently maintains the priority relation in the overlapping portions of the areas 1a, 2a and 3a. Further, in the wireless data communication system of the present invention, even in the wireless data communication system including a larger number of base stations, the priority P1 that maintains the priority relationship of P1>P2> P3 in the entire service area, Provide wireless data communication with communication quality according to P2 and P3. Although not shown in FIG. 1, the base station A
1, base station B.2, base station C.3 are each connected to the network, and the management node is via the network,
It receives communication information of each base station and controls transfer between each base station. Also, base station A.1, base station B.2, base station C.
3 exchanges respective communication information via the network.
In addition, the base station A.1, base station B.2, base station C.3, and the mobile station use a packet multiple access method in which connection control information is included in the packet data as a plurality of packet data communication signals (Japanese Patent Application No. (Shown in Japanese Patent Laid-Open No. 11-014979). The management node may be configured as a distributed processing node in each base station, or may be managed as a server.

Next, the configuration of the base station of the above-mentioned wireless data communication system will be described with reference to the drawings. FIG. 2 is a block diagram showing a configuration of a base station used in the wireless data communication system according to the embodiment of the present invention. In the figure, reference numeral 10 indicates a base station A
1, a delivery route control processing unit 1A for controlling the route of a packet delivered to a mobile station via the base station by controlling the transfer of packets between the base station B.2 and the base station C.3. It is a management server. A control unit 20 controls data in the base station A.1. 21 is a management server 10 via a network 11 such as the Internet.
A server communication processing unit that communicates with the server. A wireless communication processing unit 22 performs wireless data communication with the mobile station using packetized data.

Reference numeral 23 is priority information (P1, P1 included in the header of packet data when communicating with the mobile station in packets).
P2 or P3) corresponding priority coefficient (W1,
W2, W3) is a communication control processing unit that controls the number of communication packets per unit time. Reference numeral 24 indicates information on the priority coefficient used by each base station in the shared range (1a-1, 1a-2, 1a-3) that shares the communicable range with the base stations B-2 and C-3. It is a priority coefficient reception processing unit for receiving. 25 is each shared range (1a-1, 1a
-2, 1a-3), a mobile station distribution detection processing unit that detects the distribution of mobile stations by priority order. Regarding the priority order, based on the information about the user included in the header of the packet data from the mobile station, the priority order information of the user is retrieved from the database that stores the user information via the network 11. The target controlled by the communication control processing unit 25 using the priority coefficient is not limited to the number of communication packets per unit time, but is related to communication delay time, communication jitter, packet loss rate, and other communication quality. Is preferable. Further, the mobile stations detected by the mobile station distribution detection processing unit 25 may be limited to the mobile stations in communication.

Reference numeral 26 designates surrounding base stations B.2 and base station C.
3 based on the priority coefficient information in the shared range with the mobile station 3 and the distribution of the mobile stations detected by the mobile station distribution detection processing unit 25, the priority of the base station A. 1 in the communicable range from the base station A. Priority factors W1, W corresponding to degrees P1, P2, P3
2, a priority coefficient determination processing unit that determines W3. 27
Is a base station capacity control processing unit that allocates base station capacity to mobile stations in proportion to the priority coefficients W1, W2, and W3. Numeral 28 is a base station for each priority in the surrounding base stations based on the priority coefficients of the surrounding base stations received by the priority coefficient receiving processing unit when the base station capacity allocated to each of the priorities is insufficient. A transfer rate calculation processing unit that obtains a capacity and calculates a transfer rate, which is a rate of transferring communication packets to surrounding base stations that have a free base station capacity. 29 is the management server 1
This is a communication data transfer processing unit that transfers a communication packet at a transfer rate calculated by the transfer rate calculation processing unit 28 to a base station having a free base station capacity under the control of the distribution path control processing unit 1A of 0.

Although not shown, the base station B.2 and the base station C.3 have the same configuration as the base station A.1 described above. Further, the server communication processing unit 21 performs not only communication with the management server 10 but also communication with other base stations (base station B · 2, base station C · 3) performed via the network 11.

Note that each processing unit shown in FIG. 2 described above may be realized by dedicated hardware, and each processing unit is configured by a memory and a CPU (central processing unit), The function may be realized by loading a program for realizing the function of the processing unit into a memory and executing the program. Also, the memory is
A hard disk device, a magneto-optical disk device, a nonvolatile memory such as a flash memory, a read-only recording medium such as a CD-ROM, a RAM (Random A)
volatile memory such as access memory),
Alternatively, it may be composed of a computer-readable and writable recording medium by a combination of these.

Next, the operation of the above-mentioned wireless data communication system will be described with reference to the drawings. FIG. 3 is a flowchart showing the operation of the wireless data communication system according to the embodiment of the present invention. Each base station of the wireless data communication system is of a waiting type and always waits for a communication request from a mobile station. During this waiting period, regularly from step S30 of FIG.
Step S32 is performed. The order of step S30 to step S31 is not limited to this. Also, when a new communication request is received from the mobile station, the processing from step S33 is performed. The details of the processing of those steps are shown below.

First, in the base station A.1, the mobile station distribution detection processing unit 25 periodically moves based on the priority information included in the header of the packet data from the mobile stations existing in the area 1a. The distribution of stations is detected by priority (step S30). Next, the priority coefficient reception processing unit 24
Is a base station B / 2, base station C / 3 that has a shared range with its own station.
Further, the information of the priority coefficient used in each base station is received via the network 11 and the server communication processing unit 21 (step S31).

Next, the priority coefficient determination processing unit 26, the priority coefficient of each shared range received by the priority coefficient reception processing unit 24, and the mobile station for each priority detected by the mobile station distribution detection processing unit 25. Based on the distribution of, the priority coefficients W1, W2, W3 for maintaining the relationship of the priorities P1, P2, P3 in the area 1a are determined (step S32). As described above, the communication control processing unit 23 can communicate with the mobile station 4, the mobile station 5, and the mobile station 6, respectively, with the number of communication packets per unit time that is proportional to the determined priority coefficients W1, W2, and W3. it can. The details of the method of determining the priority coefficient will be described later.

Further, the base station capacity control processing unit 27 allocates the base station capacity of the base station A · 1 to the mobile stations in proportion to the priority coefficients W1, W2 and W3. This allocation of the base station capacity determines the maximum number of mobile stations that the base station A.1 can simultaneously communicate in each priority order.

Next, for example, when a communication request is transmitted from the mobile station 4 to the base station A.1, the wireless communication processing unit 22
The communication request is received (step S33). Here, the base station A.1 stores the user priority information (P1) as the user information via the network 11 based on the information for specifying the user included in the header of the packet of the communication request. Search from the database. Based on the retrieved priority information, the control unit 20 detects whether or not the base station capacity assigned by the base station capacity control processing unit 27 to the priority P1 of the base station A has a vacancy, so that the priority P1 is set. It is determined whether communication is possible (step S34). If communication is possible (YES in step S34), the communication control processing unit 23 controls the number of communication packets per unit time proportional to the priority coefficient W1, and the wireless communication processing unit 22 causes the mobile station to operate. 4 is communicated with (step S35).

If communication is not possible (step S3)
4), that is, when the number of mobile stations requesting communication for the priority P1 exceeds the maximum number of mobile stations determined by the allocated base station capacity. At this time, some packets are transferred to other base stations under the control of the distribution path control processing unit 1A of the management server 10. For example, when the base station capacity assigned to the priority P1 of the base station B · 2 has a vacancy,
The transfer rate calculation processing unit 28 calculates the transfer rate, which is the rate of transferring the packets having the priority P1 to the base station B · 2 (step S36). Next, the communication data transfer processing unit 2 is controlled by the distribution route control processing unit 1A of the management server 10.
9 transfers the packet (communication data) to the base station B-2 via the network 11 at the transfer rate calculated by the transfer rate calculation processing unit 28 (step S37). The base station B · 2 transmits the transferred packet to the mobile station 4.

As described above, the above-mentioned wireless data communication system is provided with a plurality of base stations, and the communication quality according to the priority maintains the relationship of the priority in order to cope with the spatial deviation of the number of mobile stations. A wireless data communication service can be provided according to the contract fee of the user. The method of acquiring the priority information of each mobile station is not limited to the method of searching the database storing the user information via the network 11 described above,
Various methods may be used.

Further, in the above-mentioned embodiment, the priority is set for each mobile station by the contract fee, but the priority may be set for each application used in each mobile station. For example,
The priority of moving image playback applications that need to continuously supply a large amount of data is high, and it is only necessary to transfer data reliably (communication speed may be slow) The priority of applications that download software is It is possible to provide a higher quality wireless data communication system by setting the priority order according to the nature of the application such as low. Further, the priority may be a priority rank when the wireless data communication service is divided into predetermined A, B, and C ranks, for example.

Instead of the management server 10 described above,
Each base station may be provided with a device having a function of controlling a packet route, such as a wireless server or a router, in consideration of communication channel traffic. Further, the communication control processing unit 23 described above controls the number of communication packets (communication speed) per unit time according to the priority, but until the mobile station responds after connecting with the base station according to the priority. Control of the delay time, control of the communication speed and delay fluctuation, and control of the packet loss rate, which is the amount of packets lost during transmission.

Next, an embodiment of a detailed method of calculating the priority coefficient will be described below. FIG. 4 is a diagram showing in simplified form the overlapping area of the three base stations in FIG. 1 and the communicable range of each base station (the part surrounded by the triangle in the figure, hereinafter referred to as range Y). is there. Here, base station A
The priority coefficient in 1 is W _1-1 , W _2-1 and W _3-1 and the priority coefficient in base station B · 2 is W _1-2 W _2-2 W _3-2. The priority coefficient in C-3 is W _1-3 W _2-3 W _3-3 . At this time, the priority of wireless data communication totally distributed to all mobile stations existing in the range Y is set to P1 ′, P2 ′, P3 ′.
Then, it is expressed by the following equation using the priority coefficient and the priorities P1, P2, and P3.

[Equation 1] In Equation 1, the relationship between P1 ′, P2 ′ and P3 ′ is P1>
The priority coefficient determination processing unit 26 of each base station determines the priority coefficient so as to have the same relationship as P2> P3, and thus the priority relationship P1 that provides communication quality according to the priority order in the range Y '>P2'> P3 'is maintained.

Further, a method of obtaining a priority coefficient that maintains the priority as a whole when the number of base stations of the wireless data communication system is further increased will be described below. For example, 7 shown in FIG.
Two base stations will be described. A triangle formed by the central base station 50 and two surrounding base stations (for example, the base stations 51, 52) is defined as an area where the communicable ranges of the base stations 50, 51, 52 overlap. If the base stations 50, 51 and 52 in this triangular area provide the mobile stations with priority levels P _1-1 ′, P _2-1 ′ and P _3-1 ′, P _1-1 ′, P
_The priority coefficient determination processing unit 26 determines the priority coefficient of each base station using the formula of Equation 1 so that the magnitude relationship between _2-1 'and _P3-1 ' is the same as P1>P2> P3. To do.

Further, the same calculation is performed for all the triangular areas in FIG. 5, and the priority coefficient that maintains the above-mentioned priority relationship is obtained and used as the priority coefficient of the base station 50. This makes it possible to obtain the priority coefficient in consideration of all surrounding base stations. That is, even in a large-scale network including a larger number of base stations, by obtaining the priority coefficient by the above method, it is possible to maintain the priority for providing communication quality according to the priority in the entire network. .

Next, an embodiment for maintaining the priority relationship of the base station capacities by the seven base stations shown in FIG. 5 will be described below by using specific numerical values. 6 is shown in FIG.
7 is a diagram showing a simplified area in which seven base stations in FIG. 3 and a range in which each base station can communicate (a portion surrounded by a triangle in the drawing, which is hereinafter referred to as a range Y) overlap. Here, the area composed of three base stations among the seven base stations is defined as S ₁ to S ₆ as shown in FIG.

The parameters are defined below.・ Priority: 1 to N (N types) (the smaller the number, the higher the priority) ・ Capacity of each base station i: C _i・ Allocation capacity of each base station i to area j: C _ij・ Each base Allocation capacity for priority k in area j of station i: C _ij ^k・ Required amount in each area j: D _i・ Required amount of priority k in each area j: D _i ^k・ In each area j Guaranteed amount of base station capacity for request amount of priority k: A _i ^k

(1) In area S ₁ , the values for priority 1 are as follows. · Demand: D ₁ ¹ - 3 Total between base stations ^{_{capacitance: C 11 1 + C 21 1}} + C 71 1 At this time, the communication demand from all the mobile stations a priority 1 in the area S ₁ entitlement a ₁ ¹ is a base station capacity guaranteed is expressed by the following equation. ^{_{A 1 1 = Min (D 1}} 1, C 11 1 + C 21 1 + C 71 1) ^{_{That, D 1 1 ≦ C 11 1}} + C 21 1 + C 71 1 if ^{_{A 1 1 = D 1 1 D}} 1 1> C 11 ^{If 1} + C ₂₁ ¹ + C ₇₁ ^1, then A ₁ ¹ = C ₁₁ ¹ + C ₂₁ ¹ + C ₇₁ ¹ is obtained. Hereinafter, areas S _{2 to} S ₆ are similarly calculated.

(2) In area S ₂ , the respective values for priority 1 are as follows.・ Required amount: D ₂ ¹・ Total capacity between 3 base stations: C ₂₂ ¹ + C ₃₂ ¹ + C ₇₂ ¹・ Guaranteed amount A ₂ ¹ : A ₂ ¹ = Min (D ₂ ¹ , C ₂₂ ¹ + C ₃₂ ¹ + C
₇₂ ¹ )

(3) In area S ₃ , the values for priority 1 are as follows.・ Required amount: D ₃ ¹・ Total capacity between 3 base stations: C ₃₃ ¹ + C ₄₃ ¹ + C ₇₃ ¹・ Guaranteed amount A ₃ ¹ : A ₃ ¹ = Min (D ₃ ¹ , C ₃₃ ¹ + C ₄₃ ¹ + C
₇₃ ¹ )

(4) In area S ₄ , the values for priority 1 are as follows.・ Required amount: D ₄ ¹・ Total capacity between 3 base stations: C ₄₄ ¹ + C ₅₄ ¹ + C ₇₄ ¹・ Guaranteed amount A ₄ ¹ : A ₄ ¹ = Min (D ₄ ¹ , C ₄₄ ¹ + C ₅₄ ¹ + C
₇₄ ¹ )

(5) In area S ₅ , the values for priority 1 are as follows.・ Required amount: D ₅ ¹・ Total capacity between 3 base stations: C ₅₅ ¹ + C ₆₅ ¹ + C ₇₅ ¹・ Guaranteed amount A ₅ ¹ : A ₅ ¹ = Min (D ₅ ¹ , C ₅₅ ¹ + C ₆₅ ¹ + C
₇₅ ¹ )

(6) In area S ₆ , the respective values for priority 1 are as follows. · Demand: D ₆ ¹ - 3 Total between base stations ^{_{capacitance: C 66 1 + C 16 1}} + C 76 1 · entitlement ^{_{A 6 1: A 6 1 =}} Min (D 6 1, C 66 1 + C 16 1 + C
₇₆ ¹ )

From the above, the priority order among the seven base stations is 1
A guaranteed capacity for the requirements of ¹Then,
Get on the street.   A¹= A₁ ¹+ A₂ ¹+ A₃ ¹+ A_Four ¹+ A_Five ¹+ A₆ ¹=               Min (D₁ ¹, C₁₁ ¹+ C_{twenty one} ¹+ C₇₁ ¹) +               Min (D₂ ¹, C_{twenty two} ¹+ C₃₂ ¹+ C₇₂ ¹) +               Min (D₃ ¹, C₃₃ ¹+ C₄₃ ¹+ C₇₃ ¹) +               Min (D_Four ¹, C₄₄ ¹+ C₅₄ ¹+ C₇₄ ¹) +               Min (D_Five ¹, C₅₅ ¹+ C₆₅ ¹+ C₇₅ ¹) +               Min (D₆ ¹, C₆₆ ¹+ C₁₆ ¹+ C₇₆ ¹)           ≤ Min (Σ_{i = 1} ⁶D_i ¹, TC¹)… (Equation 2) Here, the following relational expressions are used. Min (A, B) + Min (C, D) ≦ Min (A +
C, B + D) Also, TC¹For priority 1 among 7 base stations
It means the total capacity of the base station capacity given by.

The expression (2) shows that the base station capacities of the areas shared by a plurality of base stations are correlated with each other, rather than closing each area and managing the base station capacities by priority. It means that the efficiency among the seven base stations is improved by managing each priority while updating. That is, by using the wireless data communication system of the present invention,
It is possible to efficiently manage the capacity of base stations among a plurality of base stations. At this time, the guaranteed amount A ^k for each priority k among the seven base stations has the following relationship. Priority 1: A ¹ = Min (Σ _{i = 1} ⁶ D _i ¹ , TC ¹ ) Priority 2: A ² = Min (Σ _{i = 1} ⁶ D _i ² , TC ² ) Priority 3: A ³ = Min (Σ _{i = 1} ⁶ D _i ³ , TC ³ ) :: Priority N: A ^N = Min (Σ _{i = 1} ⁶ D _i ^N , TC ^N ) However, TC ^k is the priority k among the seven base stations. Is the total capacity given to.

Based on the above guarantee amount A ^k , the ratio of the communication request amount from the mobile station for each priority order is low with respect to the total capacity of the base station capacity allocated from a plurality of base stations for each priority order. As the base station capacity increases, the communication quality can be kept higher. That is, by setting the ratio in the relationship of the following expression, it is possible to provide the communication quality of the relationship according to the priority order. (Σ _{i = 1} ⁶ D _i ¹ ) / TC ¹ <(Σ _{i = 1} ⁶ D _i ² ) / TC ² <
... <(Σ _{i =} ¹⁶ D _i ^N ,) / TC ^{N The} following effects can be obtained by controlling the relationship of the base station capacities corresponding to the priorities with a plurality of base stations by the above relational expressions.・ It is possible to improve efficiency for each priority by managing the capacity of the base stations among the 7 base stations for each priority. -Capacity management for each priority can be performed so that the priority relationship is maintained among the seven base stations.

Further, compared with the wireless data communication system which manages the communication quality by using the fixed ratio priority corresponding to the conventional priority order, the communication quality is managed while maintaining the magnitude relation of the priority. The superiority of the wireless data communication system of the present invention will be described. As a conventional example, it is assumed that priority P1 of priority 1 is priority P2 of priority 2 = 2: 1. That is, the base station capacity corresponding to priority 1 is 2C, and the base station capacity corresponding to priority 2 is C. At this time, since the ratio of the priority to the priority is fixed, the base station capacity assigned to the priority 2 is also fixed to C.

In the above example, if the communication request amount from the mobile station for the priority order 2 exceeds the capacity C, the communication request is not saved. Further, when the communication request amount from the mobile station for the priority order 1 is less than the allocated base station capacity 2C, there is a wasteful unused base station capacity.

From the above, the priority according to the priority order is not a fixed ratio, but is updated in a timely manner according to the communication request from the mobile station, and the priority relationship according to the priority order is maintained. By controlling, it is possible to efficiently provide the wireless data communication system having the communication quality according to the priority order.
In addition, from the relationship between the communication request amount from the mobile station and the base station capacity between the priorities, the base station capacity has a width that allows it to approach the most efficient state.

A specific example of the above description will be shown below. A wireless data communication system including three base stations as shown in FIG. 1 will be described. First, the parameters are defined as follows. -Total base station capacity in the case of base station x: Cx-Capacity ratio of base station capacity allocated to priority k in base station x: λxk-Total communication request amount from mobile stations with priority n: Dn

As a result, when the priority is set to two,
It can be expressed as follows for each of the three base stations. Base station A: 1: (C1, λ11, λ12) where λ11
+ Λ12 = 1 base station B-2: (C2, λ21, λ22) where λ21
+ Λ22 = 1 Base station C3: (C3, λ31, λ32) where λ31
+ Λ32 = 1 Next, the communication request amount from the mobile stations according to the priority order among the three base stations is expressed as follows. Priority 1: D1 Priority 2: D2

The control of the capacity of the base station will be described by making calculations using specific numerical values based on the above equations. When the following values are given to three base stations, base station A · 1: (C1 = 1000, λ11 = 0.6, λ
12 = 0.4) Base station B-2: (C2 = 800, λ21 = 0.5, λ
22 = 0.5) Base station C3: (C3 = 1200, λ31 = 0.7, λ
32 = 0.3) The total base station capacity among the three base stations assigned to each priority can be calculated as follows. Priority 1 Assigned base station capacity: 600 + 400 + 84
0 = 1840 Priority 2 assigned base station capacity: 400 + 400 + 36
0 = 1160

Here, the case where the communication request amount from the mobile station takes various values will be considered. (1) In the case of (D1, D2) = (900, 1000) A margin indicating the margin of the base station capacity assigned to each priority at this time with respect to the communication request amount from the mobile station (the larger the value, the more margin there is) ) Is obtained as follows. Margin of priority 1: 1-900 / 1840 = 0.56
1 Priority 2 priority: 1-1000 / 1160 = 0.1
68 As described above, in the above case, the margin of priority 1 is larger, so that the priority of communication quality is maintained in the area composed of three base stations. Further, since there is no request that exceeds the capacity, all communication requests are accepted and there is no need to update the capacity of the base station.

(2) (D1, D2) = (400, 200)
In the case of 0), the margin for each priority at this time is as follows. Margin of priority 1: 1-400 / 1840 = 0.
732 Priority 2 margin: 1-2000 / 1160 =-
0.734 Although the relationship of priority of communication quality is maintained, there is a margin in the capacity of the base station of priority 1 and 42.0% of the requests for priority 2 cannot be accepted, so it is efficient. I can not say.

Therefore, for example, consider a case where a part of the capacity of the base station assigned to the priority 1 is assigned to the priority 2. However, if the base station capacity for which the allocation is changed from priority 1 is C ′, the following relational expression must hold. 400 / (1840-C ') <2000 / (1160
+ C ') 1160 + C'<5 (1840-C ') 6C'<8040 C '<1340 That is, from the base station capacity assigned to priority 1 to 1340
With base station capacities up to the following, even if the allocation is changed to priority 2, the priority of communication quality is maintained.

Here, considering the case where 1000 of the base station capacities assigned to priority 1 are changed to be assigned to base station capacities of priority 2, the margin is as follows. Margin of priority 1: 1-400 / 840 = 0.
533 Margin of priority 2: 1-2000 / 2160 =
As a result of the above 0.074, it is possible to accept a communication request of priority 2, and in an area composed of 3 base stations,
The priority of communication quality is maintained.

(3) (DI, D2) = (2400, 80
In the case of 0), the margin for each priority at this time is as follows. Margin of priority 1: 1-2400 / 1840 =-
0.304 Priority 2 margin: 1-800 / 1160 = 0.
450 Therefore, 2 out of the communication request amount from the mobile station with the priority 1
3.3% of the requests are not accepted, all the requests for priority 2 are accepted, and there is a margin in the capacity of the base station. In this case, since the relationship of the priority order of the communication quality is broken, a part of the base station capacity assigned to the priority order 2 is assigned to the priority order 1.

At this time, if the base station capacity for changing the allocation from the priority level 2 to the priority level 1 is C ″, the following relationship must be satisfied: 2400 / (1840 + C ″) <800 / (116
0-C ") 3 (1160-C") <1840 + C "1640 <4C" 410 <C "That is, the base station capacity for changing the allocation from priority 2 to priority 1 needs to be larger than 410. Means that.

Considering the case where the capacity of the base station for changing the allocation from the priority level 2 to the priority level 1 is 500, the margin of the priority level 1 is 1-2400 / 2340 =-
0.025 Margin of priority 2: 1-800 / 660 =-
It becomes 0.213, and the communication request from the mobile station of 2.5% for the priority 1 and 17.5% for the priority 2 cannot be accepted. As described above, the priority 1 has a lower probability that the communication request from the mobile station cannot be accepted, and holds the relationship of the priority of the communication quality. Further, when a wireless data communication system is configured with a larger number of surrounding base stations, it is possible to improve the reception of communication requests from mobile stations by transferring packets to the surrounding base stations. it can.

As shown by using the above specific numerical values,
A wireless data communication system according to an embodiment of the present invention is
It is possible to communicate with the mobile station with the communication quality corresponding to the priority. The above communication quality is suitable by using the capacity of the base station, the transmission rate of the packet, and the like, and each base station controls using the priority coefficient corresponding to the priority.

If the priority coefficient obtained by the above-mentioned method is used, the efficiency of the network may decrease due to the instantaneous traffic concentration of the mobile station.
By managing the packet transfer between base stations in units of a plurality of base stations and controlling the communication data transfer processing unit 29 by the management server 10 or the wireless server described above, the free base station capacity of the surrounding base stations can be made effective. It can be prevented by using it. Further, the wireless server may manage the data distribution amount to each base station and the priority coefficient of each base station, and a more efficient network can be constructed.

Further, in FIG. 2, a program for realizing the function of a processing unit for performing various processes is recorded in a computer-readable recording medium, and the program recorded in this recording medium is read into a computer system and executed. You may perform each process by doing. The “computer system” mentioned here includes an OS and hardware such as peripheral devices.

The "computer-readable recording medium" means a flexible disk, a magneto-optical disk,
A portable medium such as a ROM or a CD-ROM, or a storage device such as a hard disk built in a computer system. Furthermore, "computer-readable recording medium"
Is a volatile memory (RAM) inside a computer system that serves as a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line, and holds the program for a certain period of time. It also includes things.

The above program may be transmitted from a computer system that stores the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the program may be for realizing a part of the functions described above. Further, it may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system. Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes a design and the like within a range not departing from the gist of the present invention.

[0071]

As described above, in the wireless data communication system according to the present invention, since each base station communicates with the mobile station with the communication quality based on a plurality of priorities, the priority coefficient corresponding to each priority is given. When there is one or a plurality of shared ranges that share a communicable range with a surrounding base station and a communication control unit that controls communication quality by using, the priority used by the surrounding base stations in the shared range. Priority coefficient receiving means for receiving the priority coefficient, mobile station distribution detecting means for detecting the distribution of mobile stations for each priority existing in each shared range, priority coefficient received from surrounding base stations and the mobile station Based on the distribution, the mobile station of each priority is provided with the priority coefficient determining means for determining the priority coefficient used in the own station in order to maintain the priority relationship in the range communicable from the own station. If the distribution of But, it is possible without being affected by the 該偏Ri, maintaining the relationship between the priority performs mobile station and a radio data communication with the communication quality based on priority.

As a result, the wireless data communication system
It is possible to provide a wireless data communication service capable of changing the allocation of communication resources while maintaining the communication quality according to the priority in response to the uneven distribution of mobile stations and the change in communication volume.

Further, in the wireless data communication system according to the present invention, the communication control means for controlling the communication capacity by using the priority coefficient corresponding to each priority and the priority used by the surrounding base stations in the shared range. Priority coefficient receiving means for receiving coefficients, mobile station distribution detecting means for detecting the distribution of mobile stations by priority existing in each shared range, priority coefficient and mobile station distribution received from surrounding base stations The base station is provided with the priority coefficient determining means for determining the priority coefficient used by the local station, so that each base station is provided from the surrounding base stations in the range where the communicable range with the mobile station overlaps. It is possible to control the communication capacity of the own station in consideration of the communication capacity of the mobile station and perform wireless data communication with the mobile station.

As a result, it is possible to maintain the relation of the communication quality according to the priority by the communication capacity assigned according to the priority to the mobile stations within the communicable range from each base station. That is, by constructing a wireless data communication area by arranging base stations having such a shared area in a chain, priority relationships are maintained and priority levels that are less affected by the distribution of mobile stations. Relationships can be maintained throughout the area.

Further, in the wireless data communication system according to the present invention, each base station assigns to each priority and base station capacity control means for determining the base station capacity to be assigned for each priority based on the priority coefficient. When the base station capacity is insufficient, based on the base station capacity information of each base station obtained from the priority coefficient received from the surrounding base stations, the communication data is transferred to the surrounding base stations with a free base station capacity. Since the transfer rate calculating means for calculating the transfer rate which is a ratio and the communication data transfer means for transferring to the surrounding base stations having a free base station capacity based on the transfer rate are further provided, all the priority levels are set. When the base station capacity allocated in step 1 is insufficient, by adjusting the capacity ratio of the base station capacity allocated by priority,
It is possible to make a difference in ease of connection with the base station for each priority mobile station. As a result, it is possible to transfer the communication data to the surrounding base stations with the free base station capacity,
The efficiency of the entire network can be improved.

Further, in the wireless data communication system according to the present invention, the wireless data communication system carries out communication using a packet multiple access method in which the communication signal is a plurality of packet data and the packet data includes connection control information. In this case, the communication control means uses the priority coefficient based on the priority information to control the number of communication packets per unit time in communication with the mobile station, and the communication data transfer means,
Since the packet data is transferred as the communication data, it is possible to perform the wireless data communication while maintaining the priority by using the communication method based on the packet multiple access method. As a result, the communication path can be managed by packetization, and the packets can be transferred between the base stations.

The wireless data communication system according to the present invention further comprises a wireless server for collectively managing a plurality of base stations, each base station further comprising a server communication means for communicating with the wireless server, The degree coefficient receiving means is
Since information about the priority coefficient being used by the surrounding base stations is received through the wireless server, the wireless server can manage the priority coefficients used by the plurality of base stations.

The wireless data communication system according to the present invention further comprises a wireless server for collectively managing a plurality of base stations, and each base station further comprises a server communication means for communicating with the wireless server. Since the server causes the communication data transfer means to transfer the distribution route of the packet to the mobile station, the communication data transfer between the base stations can be controlled from the wireless server, and a more efficient wireless data communication system can be provided.

Further, the wireless data communication system according to the present invention further comprises a management server for collectively managing a plurality of base stations, and each of the base stations has a server communication means for communicating with the management server via a network. Further, the management server transfers the packet distribution route to the mobile station to the communication data transfer means when the base stations connected to each other by the wired communication network have a communicable range overlapping with the mobile station. Since it is controlled by this, the communication data transfer between the base stations can be controlled from the management server, and a more efficient wireless data communication system can be provided.

Further, in the wireless data communication system according to the present invention, since the communication data transfer means is a router, when the communication traffic at the router of a certain base station is large, the function of the router makes it possible to use the base with the free communication traffic. Communication data can be transferred to a router equipped with a station.

Further, in the wireless data communication system according to the present invention, the priority relation is based on the priority order, and the priority order is determined by the contract fee with the user of the mobile station. It is possible to provide a wireless data communication service having a higher communication quality to a user having a higher priority than a user having a lower priority. Further, in the wireless data communication system according to the present invention, the magnitude relation of the priorities is according to the priority order, and the priority order is determined by the application being used by the mobile station, so that priority is given to the application requiring higher communication quality. Wireless data communication service can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a wireless data communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a base station used in the wireless data communication system according to the embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of the wireless data communication system according to the embodiment of the present invention.

4 is a diagram of FIG. 1 according to one embodiment of the present invention;
It is a figure which simplifies and shows the area where two base stations and the range where each base station can communicate overlap.

FIG. 5 shows seven base stations according to an embodiment of the present invention;
It is a figure which simplifies and shows the area where the communicable range of each base station overlaps.

FIG. 6 shows seven base stations according to an embodiment of the present invention;
It is a figure which simplifies and shows the area where the communicable range of each base station overlaps.

[Explanation of symbols]

1 Base station A 2 Base station B 3 Base station C 1a Communication range of base station A 2a Communication range of base station B 3a Communication range of base station C 1a-1, 1a-2, 1a-3 Shared range 4, 5, 6 mobile stations 10 management server 1A delivery route control processing unit 11 network 20 Control unit 21 Server communication processing unit 22 Wireless communication processing unit 23 Communication control processing unit 24 Priority coefficient reception processing unit 25 Mobile Station Distribution Detection Processing Unit 26 Priority Coefficient Determination Processing Unit 27 Base station capacity control processing unit 28 Transfer Rate Calculation Processing Unit 29 Communication data transfer processing unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasushige Ueoka             3-5-1, Otemachi, Chiyoda-ku, Tokyo             Ryo Materials Corporation Mobile Business Promotion Division             Within (72) Inventor Kazuyoshi Tasato             1-8-10 Honcho, Kichijoji, Musashino City, Tokyo               Mitsubishi Materials Corporation Mobile Business Development             In the center (72) Inventor Kenzo Nakamura             1-8-10 Honcho, Kichijoji, Musashino City, Tokyo               Mitsubishi Materials Corporation Mobile Business Development             In the center (72) Inventor Yoshihiro Matsuno             1-8-10 Honcho, Kichijoji, Musashino City, Tokyo               Mitsubishi Materials Corporation Mobile Business Development             In the center (72) Inventor Takeshi Hattori             3-12-21-205 Seta, Setagaya-ku, Tokyo F-term (reference) 5K033 AA01 AA04 CB17 DA02 DA19                 5K067 AA11 AA41 BB21 DD23 DD57                       EE02 EE10 EE63 HH22 HH23                       JJ02 JJ17

Claims (12)

[Claims] 1. A wireless data communication system comprising a mobile station and a plurality of base stations for performing wireless data communication, wherein each base station communicates with the mobile station with communication quality based on a plurality of priorities. Therefore, when there is one or a plurality of shared ranges that share a communicable range with the surrounding base stations, the communication control means that controls the communication quality using the priority coefficient corresponding to each priority Priority coefficient receiving means for receiving the priority coefficient used by the surrounding base stations in the shared range, and mobile station distribution detection means for detecting the distribution of the mobile stations for each priority existing in each shared range, Based on the priority coefficient received from the surrounding base stations and the distribution of the mobile stations, determine the priority coefficient used by the own station for maintaining the relationship of the priority in the range communicable from the own station. With priority coefficient determination means Wireless data communication system, characterized by comprising. 2. A wireless data communication system comprising a mobile station and a plurality of base stations for performing wireless data communication, wherein each base station communicates with the mobile station with a communication capacity based on a plurality of priorities. Therefore, when there is one or a plurality of shared ranges that share a communicable range with surrounding base stations and communication control means that controls the communication capacity using the priority coefficient corresponding to each priority, Priority coefficient receiving means for receiving the priority coefficient used by the surrounding base stations in the shared range, and mobile station distribution detection means for detecting the distribution of the mobile stations for each priority existing in each shared range, Based on the priority coefficient received from the surrounding base stations and the distribution of the mobile stations, determine the priority coefficient used by the own station for maintaining the relationship of the priority in the range communicable from the own station. With priority coefficient determination means Wireless data communication system, characterized by comprising. 3. The base station capacity control means for determining the base station capacity to be allocated for each priority based on the priority coefficient, and the base station capacity allocated to each priority is insufficient. In case,
Based on the base station capacity information of each base station obtained from the priority coefficient received from the surrounding base stations, a transfer rate, which is a ratio of transferring communication data to a surrounding base station having a free base station capacity, is calculated. 3. The wireless data communication according to claim 2, further comprising: a transfer rate calculating means; and a communication data transfer means for transferring to a surrounding base station having a free base station capacity based on the transfer rate. system. 4. When the wireless data communication system performs communication using a packet multiple access method in which a communication signal is a plurality of packet data and the packet data includes connection control information, the communication control means includes: The wireless data communication according to claim 3, wherein the number of communication packets per unit time in communication with the mobile station is controlled using a priority coefficient, and the communication data transfer means transfers the packet data. system. 5. A wireless server that collectively manages a plurality of base stations, wherein each of the base stations further includes a server communication unit that communicates with the wireless server, and the priority coefficient receiving unit includes: The wireless data communication system according to claim 4, wherein information about a priority coefficient being used by a surrounding base station is received via a wireless server. 6. A wireless server that collectively manages a plurality of base stations, wherein each of the base stations is between a server communication unit that communicates with the wireless server and a base station that has a communicable range with a mobile station. Is connected by a wired communication network, the wireless server further comprises a distribution path control means for controlling the distribution path of the packet to the mobile station by transferring the packet to the communication data transfer means. The wireless data communication system according to claim 4, wherein: 7. A management server for collectively managing a plurality of base stations, wherein each of the base stations communicates with the management server via a network, and server communication means for communicating with the mobile station. When the overlapping base stations are connected by a wired communication network, the management server controls a distribution route of the packet to the mobile station by causing the communication data transfer unit to control the distribution route. The wireless data communication system according to claim 4, further comprising: 8. The wireless data communication system according to claim 4, wherein the communication data transfer means is a router. 9. The size relation between the priorities is according to a priority order, and the priority order is determined by a contract fee with a user who uses a mobile station. The wireless data communication system according to. 10. The size relation between the priorities is according to a priority order, and the priority order is determined by an application being used by the mobile station. Wireless data communication system. 11. A wireless data communication method using a wireless data communication system comprising a mobile station and a plurality of base stations performing wireless data communication, wherein each base station has a communication quality based on a plurality of priorities. In order to communicate with the mobile station, the step of controlling the communication quality using the priority coefficient corresponding to each priority, and when there is one or more shared ranges that share the communicable range with the surrounding base stations. A step of receiving the priority coefficient used by the surrounding base stations in the shared range, a step of detecting a distribution of mobile stations for each priority existing in the shared range, and the surrounding base stations Based on the priority coefficient received from the mobile station and the distribution of the mobile station, the priority coefficient used in the own station for maintaining the relationship of the priority in the range communicable from the own station is determined. Wireless data communication method comprising Rukoto. 12. A program for a base station in a wireless data communication system comprising a plurality of base stations performing wireless data communication with a mobile station, the program communicating with the mobile station with communication quality based on a plurality of priorities. Therefore, there is a step of controlling communication quality using a priority coefficient corresponding to each priority, and if there is one or more shared ranges that share a communicable range with surrounding base stations, the shared range Receiving the priority coefficient used by the surrounding base stations, detecting the distribution of the mobile stations for each priority existing in each shared range, and the priority received from the surrounding base stations. Determining a priority coefficient used by the own station for maintaining the relationship of the priority in a range communicable from the own station, based on the coefficient and the distribution of the mobile stations. Program that.