WO2022153465A1 - Communication management device, communication management method, and communication management program - Google Patents

Abstract

From among a plurality of base station devices for which a wireless communication path with a wireless terminal device has been established, a determination unit (161) determines whether there is a deficient base station device that is a base station device for which the performance of the wireless communication path with the wireless terminal device does not satisfy a predetermined performance standard. When there is a deficient base station device among the plurality of base station devices, a selection unit (162) selects a base station device that is not among the plurality of base station devices as a substitute base station device. An instruction unit (163) instructs the wireless terminal device to establish a wireless communication path with the substitute base station device in place of the deficient base station device.

Description

Communication management device, communication management method and communication management program

This disclosure relates to wireless communication.

In a wireless communication system, the occurrence of communication errors is one of the unavoidable problems. Further, in a wireless communication system, an increase in communication delay time due to retransmission is one of the unavoidable problems. The stability of wireless communication depends on the environment in which wireless communication is performed.
As one of the methods for ensuring the stability of wireless communication, there is a method of establishing a plurality of wireless communication paths and making the wireless communication paths redundant. In this method, even if a communication error occurs in some wireless communication paths and the communication delay time increases due to retransmission in some wireless communication paths, communication is performed normally in other wireless communication paths. As a result, it is possible to suppress communication errors or communication delay times as a whole wireless communication system.
Further, the wireless terminal device, which is a mobile station, dynamically selects a wireless path having good communication quality from a plurality of wireless communication paths as it moves, so that the handover can be seamlessly performed without interrupting the communication. can.

In Patent Document 1, a plurality of communication means establish wireless communication paths with separate base station devices, and communicate with the communication destination device via the established wireless communication paths. Then, in Patent Document 1, even if one of the communication means does not communicate with the communication destination device for switching the base station device during the handover period, the other two or more communication means communicate with the communication destination device. Continue communication.

Japanese Unexamined Patent Publication No. 2016-171497

If the number of wireless terminal devices in the wireless communication system is large and / or the amount of data in the wireless communication system is large, the performance deteriorates in any of the wireless communication paths. In Patent Document 1, a wireless terminal device takes the initiative in constructing a wireless communication path between a plurality of base station devices. Therefore, in Patent Document 1, even if the performance deteriorates in any of the wireless communication paths, each wireless terminal device cannot grasp the overall status of the wireless communication system, and can appropriately use the wireless communication path. There is a problem that it cannot be switched.

One of the main purposes of this disclosure is to solve the above problems. More specifically, it is a main object of the present disclosure to obtain a configuration capable of appropriately switching another wireless communication path from a wireless communication path having deteriorated performance.

The communication management device according to the present disclosure is
Insufficient bases that are base station devices whose performance of the wireless communication path to and from the wireless terminal device does not meet the predetermined performance standard for a plurality of base station devices in which a wireless communication path is set between the wireless terminal device and the device. A determination unit that determines whether or not a station device exists, and
When the shortage base station device is present in the plurality of base station devices, a selection unit that selects a base station device other than the plurality of base station devices as an alternative base station device, and a selection unit.
The wireless terminal device has an instruction unit that instructs the wireless terminal device to set a wireless communication path between the wireless terminal device and the alternative base station device in place of the shortage base station device.

According to the present disclosure, it is possible to appropriately switch another wireless communication path to a wireless communication path whose performance has deteriorated.

The figure which shows the configuration example of the wireless communication system which concerns on Embodiment 1. FIG. The figure which shows the functional structure example of the communication management apparatus which concerns on Embodiment 1. FIG. The figure which shows the functional configuration example of the wireless terminal apparatus which concerns on Embodiment 1. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 1. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 1. FIG. The figure which shows the example of the positional relationship between the wireless terminal apparatus and the base station apparatus which concerns on Embodiment 1. FIG. The figure which shows the functional configuration example of the wireless terminal apparatus which concerns on Embodiment 2. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 2. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 2. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 2. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 2. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 2. FIG. The figure which shows the example of the communication sequence which concerns on Embodiment 2. FIG. The flowchart which shows the operation example of the communication management apparatus which concerns on Embodiment 1. The figure which shows the hardware configuration example of the communication management apparatus which concerns on Embodiment 1. FIG. The figure which shows the hardware configuration example of the wireless terminal apparatus which concerns on Embodiment 1. FIG.

Hereinafter, embodiments will be described with reference to figures. In the following description and drawings of the embodiments, those having the same reference numerals indicate the same parts or corresponding parts.

Embodiment 1.
*** Explanation of configuration ***
FIG. 1 shows a configuration example of the wireless communication system 100 according to the first embodiment.
The wireless communication system 100 includes a communication management device 10, a base station device (1) 21, a base station device (N) 22, a wireless terminal device 30, and a network 40. The communication management device 10, the base station device (1) 21, and the base station device (N) 22 are also referred to as higher-level systems. The wireless terminal device 30 is also referred to as a lower system.
Although only the base station apparatus (1) 21 and the base station apparatus (N) 22 are shown in FIG. 1, a base station having the same configuration other than the base station apparatus (1) 21 and the base station apparatus (N) 22 is shown. It is assumed that the device is arranged. In the following, when it is not necessary to distinguish between the base station apparatus (1) 21, the base station apparatus (N) 22, and the base station apparatus (not shown), each is referred to as the base station apparatus 20.
Further, although only one wireless terminal device 30 is shown in FIG. 1, a plurality of wireless terminal devices 30 may exist. When a plurality of wireless terminal devices 30 exist, the following description of the wireless base station device 30 applies to each wireless terminal device 30.

The communication management device 10 is connected to the network 40 and a plurality of base station devices 20. The communication management device 10 manages a plurality of base station devices 20.
The communication management device 10 receives a frame destined for the wireless terminal device 30 from the outside via the network 40. Then, the communication management device 10 transmits the received frame to the wireless terminal device 30 via the plurality of base station devices 20. Further, the communication management device 10 receives frames from the wireless terminal device 30 in duplicate via the plurality of base station devices 20. Then, the communication management device 10 transmits one of the received plurality of frames to the outside via the network 40.

Each of the base station devices 20 sets a wireless communication path with the wireless terminal device 30. That is, the base station device 20 sets a redundant wireless communication path with the wireless terminal device 30.
The installation position of each base station device 20 is different. However, each base station device 20 is set so that the communication range partially overlaps with the communication range of any other base station device 20. For example, in the base station apparatus (1) 21 and the base station apparatus (N) 22, the communication range 2010 of the base station apparatus (1) 21 and the communication range 2020 of the base station apparatus (N) 22 partially overlap. is set up. Although only the communication range 2010 and the communication range 2020 are shown in FIG. 1, the plurality of base station devices 20 have two or more base stations, regardless of the position of the wireless terminal device 30. It is arranged so as to be included in the communication range of the station device 20.
Further, the multiple communication ranges of the base station apparatus 20 are determined according to the high redundancy required by the wireless communication system 100. As described above, the number of duplicates is two or more in order to construct a redundant wireless communication path. For example, when the number of duplicates is 3, that is, when three redundant wireless communication paths are required, the arrangement of the base station devices 20 is adjusted so that the communication ranges of the three or more base station devices 20 overlap.
In the following, the expressions "a wireless communication path is set" and "a wireless connection" are used, but both are synonymous.

The wireless terminal device 30 is roughly classified into a wireless device 32 and a lower device 35.
The radio 32 includes a communication device (1) 311 and a communication device (M) 312, and a communication device control unit 33. In FIG. 1, only the communication device (1) 311 and the communication device (M) 312 are shown, but it is assumed that communication devices having the same configuration are arranged in addition to the communication device (1) 311 and the communication device (M) 312. do. In the following, when it is not necessary to distinguish between the communication device (1) 311 and the communication device (M) 312 and the communication device (not shown), each is referred to as a communication device 31.

Each communication device 31 is an interface for communicating with the base station device 20. Individual identification information is set in each communication device 31. The individual identification information of the communication device 31 is, for example, a MAC (Media Access Control) address, an IP (Internet Protocol) address, or the like.
Each communication device 31 sets a wireless communication path with different base station devices 20.
For example, the communication device (1) 311 sets a wireless communication path with the base station device (1) 21, and the communication device (M) 312 sets a wireless communication path with the base station device (N) 22. do. The communication device (1) 311 receives the frame transmitted from the base station device (1) 21 by using the wireless communication path set between the communication device (1) 311 and the base station device (1) 21. Further, the communication device (1) 311 transmits a frame to the base station device (1) 21 by using the wireless communication path set between the communication device (1) 311 and the base station device (1) 21. Further, the communication device (M) 312 receives the frame transmitted from the base station device (N) 22 by using the wireless communication path set between the communication device (M) 312 and the base station device (N) 22. Further, the communication device (M) 312 transmits a frame to the base station device (N) 22 by using the wireless communication path set between the communication device (M) 312 and the base station device (N) 22.

The communication device control unit 33 duplicately acquires frames from the communication management device 10 from the communication device 31. Then, the communication device control unit 33 outputs any one of the plurality of frames to the lower device 35.
Further, the communication device control unit 33 acquires a frame to be transmitted from the lower device 35 to the communication management device 10. Then, the communication device control unit 33 outputs the acquired frame to each communication device 31.

In the present embodiment, the communication management device 10 to the lower device 35 are treated as one block. Although not shown in FIG. 1, a plurality of blocks from the communication management device 10 to the lower device 35 may exist under the network 40.
Further, although not shown in FIG. 1, another device may be connected to the lower device 35 by using an interface. In this case, the lower device 35 transmits the frame acquired from the communication device control unit 33 to another device connected to the lower device 35.

FIG. 2 shows an example of a functional configuration of the communication management device 10. Further, FIG. 15 shows an example of the hardware configuration of the communication management device 10.
The communication management device 10 according to the present embodiment is a computer. The operation procedure of the communication management device 10 corresponds to the communication management method. Further, the program that realizes the operation of the communication management device 10 corresponds to the communication management program.

First, the hardware configuration of the communication management device 10 will be described with reference to FIG.

The communication management device 10 includes a processor 801, a main storage device 802, an auxiliary storage device 803, and a communication device 804 as hardware.
The auxiliary storage device 803 includes the terminal information management unit 11, the base station information management unit 12, the replication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, the data transmission unit 17, and the data transmission unit 17 shown in FIG. A program that realizes the function of the data receiving unit 18 is stored.
These programs are loaded from the auxiliary storage device 803 into the main storage device 802. Then, the processor 801 executes these programs, and the terminal information management unit 11, the base station information management unit 12, the replication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, and the data transmission, which will be described later. The operation of the unit 17 and the data receiving unit 18 is performed.
In FIG. 15, the processor 801 is a terminal information management unit 11, a base station information management unit 12, a replication information management unit 13, a data processing unit 14, a destination determination unit 15, a connection management unit 16, a data transmission unit 17, and a data reception unit 18. The state in which the program that realizes the above functions is being executed is schematically shown.
The communication device 804 is used for communication with the network 40 and the base station device 20.

Next, the functional configuration of the communication management device 10 will be described with reference to FIG.

The terminal information management unit 11 manages information (hereinafter, referred to as terminal information) of the wireless terminal device 30. The terminal information includes identification information of the wireless device 32 mounted on the wireless terminal device 30, identification information of the communication device 31 in the wireless device 32, identification information of the wireless terminal device 30, and the like.
Further, the terminal information management unit 11 may manage statistical information on communication quality such as the past received power, data amount, number of retransmissions, and error rate of the wireless terminal device 30 as terminal information. Further, the terminal information management unit 11 may manage statistical information on communication quality such as the past received power, the amount of data, the number of retransmissions, and the error rate of each communication device 31 of the wireless terminal device 30 as the terminal information. Further, the terminal information management unit 11 may manage information on the frequencies used by the communication device 31 and the radio device 32 and the functions of the communication device 31 and the radio device 32 as terminal information.
Further, the terminal information management unit 11 may manage the information of the base station device 20 to which each communication device 31 is wirelessly connected as the terminal information. When the base station information management unit 12 described later manages the same information, the terminal information management unit 11 uses the information of the base station device 20 to which each communication device 31 is wirelessly connected as the terminal information. You don't have to manage it.
The terminal information management unit 11 acquires the terminal information transmitted from the wireless terminal device 30 from the data receiving unit 18, and stores the acquired terminal information in the main storage device 802 or the auxiliary storage device 803.

The base station information management unit 12 manages information (hereinafter, referred to as base station information) of the base station device 20 connected to the communication management device 10. The base station information includes identification information of the communication device included in the base station apparatus 20 and identification information of the base station apparatus 20. Further, the base station information management unit 12 may manage the identification information of the communication device 31 of the wireless terminal device 30 to which the communication device of each base station device 20 is wirelessly connected as the base station information.
Further, the base station information management unit 12 manages statistical information on communication quality such as the past data amount, the number of retransmissions, and the error rate of the wireless terminal device 30 wirelessly connected to each base station device 20 as the base station information. You may. Further, the base station information management unit 12 manages statistical information on communication quality such as the past data amount, the number of retransmissions, and the error rate of the communication device 31 wirelessly connected to each base station device 20 as the base station information. You may. Further, the base station information management unit 12 uses the base station information as the amount of data per unit time of the base station device 20, the load of the CPU (Central Processing Unit) that controls the base station device 20, and the communication device of the base station device 20. The load information of the base station apparatus 20 such as the amount of buffer used may be managed.
The base station information management unit 12 acquires the base station information transmitted from the wireless terminal device 30 or the base station device 20 from the data receiving unit 18, and stores the acquired base station information in the main storage device 802 or the auxiliary storage device 803. do.

The replication information management unit 13 manages a unique value for identifying a frame.
The duplication information management unit 13 may manage a value that increases for each frame, such as a sequence number, as a unique value. Further, the replication information management unit 13 may manage the sequence number for each base station apparatus 20 as a unique value. For example, the replication information management unit 13 manages a unique value for receiving a frame for each base station device 20 for each base station device 20. Further, the replication information management unit 13 manages a unique value for frame transmission for each base station device 20 for each base station device 20. In the following, the replication information management unit 13 shall manage the sequence number as a unique value. That is, the replication information management unit 13 manages the sequence number for each base station device 20 for receiving frames (uplink communication) from the base station device 20. Further, the replication information management unit 13 manages a sequence number for each base station device 20 for transmitting a frame to the base station device 20 (communication in the downlink direction).
Hereinafter, the sequence number for receiving a frame from the base station apparatus 20 (communication in the uplink direction) is referred to as an uplink sequence number. Further, a sequence number for transmitting a frame to the base station apparatus 20 (communication in the downlink direction) is referred to as a downlink sequence number.

The data processing unit 14 sorts the received frames.
Specifically, when the data processing unit 14 receives a frame addressed to the wireless terminal device 30 from the network 40, the data processing unit 14 outputs the received frame to the destination determination unit 15.
On the other hand, when a frame addressed to another device other than the communication management device 10 is received from the base station device 20, the data processing unit 14 transmits the received frame to the network 40. When a frame addressed to the communication management device 10 is received from the base station device 20, the data processing unit 14 processes the frame.

The destination determination unit 15 duplicates the frame addressed to the wireless terminal device 30 output from the data processing unit 14. Further, the destination determination unit 15 acquires the downlink sequence number from the duplicate information management unit 13. Then, the destination determination unit 15 adds the acquired downlink sequence number to a plurality of the same frames obtained by duplication. Further, the destination determination unit 15 adds the identification information of the transmission destination base station device 20 to each of the plurality of same frames. After that, the destination determination unit 15 outputs a plurality of the same frames to the data transmission unit 17.
Further, when a plurality of the same frames transmitted from the plurality of base station devices 20 via the plurality of wireless communication paths are output from the data receiving unit 18, the destination determination unit 15 is moved up from the replication information management unit 13. Get the sequence number. Then, the destination determination unit 15 determines whether or not the same frame as the received frame has already been received by using the acquired uplink sequence number. The destination determination unit 15 outputs the first received frame among a plurality of the same frames to the data processing unit 14. The destination determination unit 15 discards the remaining frames among a plurality of the same frames.

Specifically, in the case of transmitting a frame to the wireless terminal device 30, the destination determination unit 15 notifies the duplicate information management unit 13 of the wireless terminal device 30 to which the frame is transmitted. The duplication information management unit 13 outputs the downlink sequence number of the wireless terminal device 30 notified from the destination determination unit 15 to the destination determination unit 15. The destination determination unit 15 adds a downlink sequence number acquired from the duplication information management unit 13 to a plurality of the same frames obtained by duplication. Further, when a plurality of the same frames are transmitted to the wireless terminal device 30, the destination determination unit 15 increases the downlink sequence number of the wireless terminal device 30 to which the frame is transmitted, which is managed by the replication information management unit 13. Let me. It is used when transmitting the next frame to the wireless terminal device 30 having the same downlink sequence number after the increase.

Further, in the case of receiving a frame from the wireless terminal device 30, the destination determination unit 15 notifies the duplicate information management unit 13 of the wireless terminal device 30 that is the source of the received frame. The duplication information management unit 13 outputs the uplink sequence number of the wireless terminal device 30 notified from the destination determination unit 15 to the destination determination unit 15. The destination determination unit 15 compares the sequence number of the received frame with the uplink sequence number acquired from the replication information management unit 13. If the sequence number of the received frame is smaller than the uplink sequence number, the destination determination unit 15 discards the received frame. If the sequence number of the received frame is the same as the uplink sequence number, the destination determination unit 15 determines whether or not the frame to which the sequence number of the received frame is added has been received in the past. If the frame to which the sequence number of the received frame is added has not been received in the past, the destination determination unit 15 outputs the received frame to the data processing unit 14. On the other hand, when the frame to which the sequence number of the received frame is added has been received in the past, the destination determination unit 15 discards the received frame. After that, the destination determination unit 15 increases the uplink sequence number of the wireless terminal device 30 that is the source of the received frame, which is managed by the replication information management unit 13. It is used when receiving the next frame from the wireless terminal device 30 having the same uplink sequence number after the increase.
If the sequence number of the received frame is larger than the uplink sequence number, the received frame is output to the data processing unit 14. Further, in this case, a state in which the sequence number existing between the sequence number of the received frame and the uplink sequence number is missing occurs. That is, in this state, the frame to which the missing sequence number is added has not arrived at the communication management device 10. Therefore, the destination determination unit 15 instructs the base station device 20 that is wirelessly connected to the wireless terminal device 30 that is the source of the received frame to retransmit the undelivered frame.

The connection management unit 16 monitors the performance of the wireless communication path between the wireless terminal device 30 and the base station device 20. Then, when the performance of the wireless communication path between the wireless terminal device 30 and the base station device 20 does not meet the predetermined performance standard, the switching of the base station device 20 is determined.
The connection management unit 16 has a determination unit 161, a selection unit 162, and an instruction unit 163 as internal configurations. Hereinafter, each of the determination unit 161, the selection unit 162, and the instruction unit 163 will be described.

The determination unit 161 determines whether or not the plurality of base station devices 20 have a shortage of base station devices 20 whose performance of the wireless communication path to and from the wireless terminal device 30 does not meet the predetermined performance standard. To judge. The performance of the wireless communication path is, for example, communication quality such as received power, error rate, and signal-to-noise ratio (S / N ratio). Further, the determination unit 161 may use the effect of redundancy as the performance of the wireless communication path. In order for the plurality of wireless communication paths to serve as redundant paths, it is not desirable for the wireless terminal device 30 to set two or more wireless communication paths with the same base station device 20. Further, when a plurality of base station devices 20 wirelessly connected to the wireless terminal device 30 are close to each other, the effect of redundancy is diminished. On the other hand, when the frequency band and channel used for wireless communication are different for each base station device 20, the effect of redundancy is enhanced. The determination unit 161 wirelessly communicates such a wireless connection form between the base station device 20 and the wireless terminal device 30, the distance between the base station devices 20 as a wireless communication path, and the difference in frequency and channel between the base station devices 20. It may be evaluated as the performance of the road.
The determination unit 161 extracts the base station device 20 when the communication quality of the wireless communication path does not meet the standard or the effect of redundancy does not meet the standard as the insufficient base station device.
The process performed by the determination unit 161 corresponds to the determination process.

The selection unit 162 selects an alternative base station device when there is a missing base station device. The alternative base station device is a base station device 20 that replaces the shortage base station device. The alternative base station device needs to meet the performance standard for the performance of the wireless communication path set with the wireless terminal device 30.
For example, it is assumed that the wireless terminal device 30 shown in FIG. 1 is wirelessly connected to the base station device (1) 21 and the base station device (N) 22. In this case, it is assumed that the base station apparatus (N) 22 is extracted as the insufficient base station apparatus by the determination unit 161. The selection unit 162 is a base station device 20 other than the base station device (1) 21 and the base station device (N) 22 that are wirelessly connected to the wireless terminal device 30, and is a wireless communication path with the wireless terminal device 30. The base station apparatus 20 whose performance satisfies the performance standard is selected as the alternative base station apparatus of the base station apparatus (N) 22.
The process performed by the selection unit 162 corresponds to the selection process.

The instruction unit 163 instructs the wireless terminal device 30 to set a wireless communication path between the wireless terminal device 30 and the alternative base station device instead of the insufficient base station device.
Specifically, the instruction unit 163 generates an alternative base station notification, and transmits the generated alternative base station notification to the insufficient base station apparatus via the data transmission unit 17. The alternative base station notification includes identification information of the alternative base station apparatus.
The insufficient base station apparatus that has received the alternative base station notification transmits the connection refusal notification to the wireless terminal apparatus 30. The connection refusal notice notifies that the insufficient base station device refuses the wireless connection with the wireless terminal device 30. The connection refusal notification includes the identification information of the alternative base station device included in the alternative base station notification.
The wireless terminal device 30 that has received the connection refusal notice sets a wireless communication path with the alternative base station device instead of the insufficient base station device based on the identification information of the alternative base station device included in the connection refusal notice.
In this way, the instruction unit 163 instructs the wireless terminal device 30 to set a wireless communication path between the wireless terminal device 30 and the alternative base station device instead of the insufficient base station device.
The process performed by the instruction unit 163 corresponds to the instruction process.

The data transmission unit 17 transmits a plurality of the same frames output from the destination determination unit 15 to the transmission destination base station device 20. The data transmission unit 17 determines the transmission destination base station device 20 by using the identification information of the base station device 20 added to the frame by the destination determination unit 15.

The data receiving unit 18 receives a plurality of the same frames transmitted from the plurality of base station devices 20. Then, the data receiving unit 18 outputs a plurality of the same received frames to the destination determination unit 15.
Further, the data receiving unit 18 receives the terminal information transmitted from the wireless terminal device 30 from any of the base station devices 20. The data receiving unit 18 outputs the received terminal information to the terminal information management unit 11.
Further, the data receiving unit 18 receives the base station information transmitted from the wireless terminal device 30 or the base station device 20. The data receiving unit 18 outputs the received base station information to the base station information management unit 12.

FIG. 3 shows an example of the functional configuration of the wireless terminal device 30. Further, FIG. 16 shows an example of the hardware configuration of the wireless terminal device 30.
The wireless terminal device 30 according to this embodiment is a computer.

First, the hardware configuration of the wireless terminal device 30 will be described with reference to FIG.

The wireless terminal device 30 includes a processor 901, a main storage device 902, an auxiliary storage device 903, and a communication device 31 as hardware.
The auxiliary storage device 903 stores a program that realizes the functions of the communication device control unit 33, the data transmission unit 36, and the data reception unit 37 shown in FIG.
These programs are loaded from the auxiliary storage device 903 into the main storage device 902. Then, the processor 901 executes these programs to operate the communication device control unit 33, the data transmission unit 36, and the data reception unit 37, which will be described later.
FIG. 16 schematically shows a state in which the processor 901 is executing a program that realizes the functions of the communication device control unit 33, the data transmission unit 36, and the data reception unit 37.
As described above, a plurality of communication devices 31 are provided in the wireless terminal device 30.

Next, the functional configuration of the wireless terminal device 30 will be described with reference to FIG.

The lower device 35 performs processing other than processing related to communication. The destination of the frame from the higher system is the lower device 35. The lower device 35 may be provided with an interface for communicating with the outside, or may communicate with other devices. The destination of the frame from the host system may also be an external device.

The radio 32 is composed of a plurality of communication devices 31, a communication device control unit 33, a data transmission unit 36, and a data reception unit 37. Further, the communication device control unit 33 includes a communication device information management unit 331, a base station information management unit 332, a replication information management unit 333, a destination determination unit 334, and a connection destination determination unit 335 as internal configurations.

The communication device information management unit 331 manages the identification information of each communication device 31. The communication device information management unit 331 also manages the identification information of the radio device 32 and the identification information of the radio terminal device 30.

The base station information management unit 332 manages information about each base station device 20 obtained by each communication device 31. For example, the base station information management unit 332 manages the identification information of the communication device of the base station device 20 and the identification information of the base station device 20. In addition, the base station information management unit 332 manages statistical information on communication quality such as past received power, data amount, number of retransmissions, error rate, etc. of each base station device 20 observed by each communication device 31. Further, the base station information management unit 332 may manage information on the frequency and function of the communication device of the base station apparatus 20.

The duplicate information management unit 333 performs the same operation as the duplicate information management unit 13 of the communication management device 10.
That is, the replication information management unit 333 manages the uplink sequence number and the downlink sequence number.

The destination determination unit 334 performs the same operation as the destination determination unit 15 of the communication management device 10.
The destination determination unit 334 duplicates the frame addressed to the communication management device 10 output from the lower device 35. Further, the destination determination unit 334 acquires an uplink sequence number from the duplicate information management unit 333. Then, the destination determination unit 334 adds the acquired uplink sequence number to a plurality of the same frames obtained by duplication. Further, the destination determination unit 334 adds the identification information of the transmission destination base station device 20 to each of the plurality of same frames. Then, the destination determination unit 334 outputs a plurality of the same frames to the data transmission unit 36.
Further, when a plurality of the same frames transmitted from the plurality of base station devices 20 via the plurality of wireless communication paths are output from the data receiving unit 37, the destination determination unit 334 descends from the replication information management unit 333. Get the sequence number. Then, the destination determination unit 334 determines whether or not the same frame as the received frame has already been received by using the acquired downlink sequence number. The destination determination unit 334 outputs the first received frame among a plurality of the same frames to the lower device 35. The destination determination unit 334 discards the remaining frames among the plurality of the same frames.

The connection destination determination unit 335 is a base station to which each communication device 31 wirelessly connects based on the communication device information managed by the communication device information management unit 331 and the base station information managed by the base station information management unit 332. Select device 20. The connection destination determination unit 335 selects the base station device 20 to which each communication device 31 wirelessly connects, using, for example, communication qualities such as received power, error rate, and S / N ratio as selection criteria. Further, the connection destination determination unit 335 may select the base station device 20 to which each communication device 31 wirelessly connects by using the effect of redundancy as a selection criterion. The meaning of the effect of redundancy is as shown in the description of the determination unit 161.

Further, after each communication device 31 sets a wireless communication path with the base station device 20 according to the selection of the connection destination determination unit 335, the data receiving unit 37 may receive a connection refusal notification from the insufficient base station device. .. In this case, the connection destination determination unit 335 substitutes the communication device 31 wirelessly connected to the insufficient base station device for the insufficient base station device based on the identification information of the alternative base station device included in the connection refusal notification. Instruct to set up a wireless communication path with the base station equipment.

Further, the connection destination determination unit 335 informs the base station information management unit 332 that the information of the insufficient base station device is not provided so that none of the communication devices 31 subsequently sets a wireless communication path with the insufficient base station device. May be registered. For example, the connection destination determination unit 335 sets a flag indicating that the base station device is a shortage base station device in the column of the base station device 20 recognized as the shortage base station device.

Further, the connection destination determination unit 335 may set a timer in the base station information management unit 332 for prohibiting the setting of the wireless communication path with the insufficient base station device for a certain period of time. After the timer expires, it is allowed to set up a wireless communication path again between the missing base station device and the certified base station device 20. Further, if the setting of the wireless communication path between the communication management device 10 and the insufficient base station device is permitted before the timer expires, the wireless communication path between the communication management device 10 and the insufficient base station device can be set. You may do so. Further, if the wireless terminal device 30 is reset before the timer expires, it may be possible to set a wireless communication path with the insufficient base station device.

The data transmission unit 36 requests the communication device 31 to transmit a frame.
In addition to the normal frame transmission, the data transmission unit 36 also requests the communication device 31 to transmit the terminal identification information notification described later.

The data receiving unit 37 outputs the frame received by each communication device 31 to the destination determination unit 334.
The data receiving unit 37 outputs a connection refusal notification to the destination determination unit 334 in addition to the normal frame.

*** Explanation of operation ***
Next, the communication sequence according to the present embodiment will be described.
FIG. 4 shows a communication sequence for the wireless terminal device 30 to transmit the information of the communication device 31 to the communication management device 10. The communication sequence shown in FIG. 4 is periodically repeated.
In FIG. 4, it is assumed that a plurality of wireless communication paths have already been set between the plurality of communication devices 31 and the plurality of base station devices 20. Since there is an existing technique for setting the wireless communication path, detailed description thereof will be omitted.

First, the communication device information management unit 331 requests each communication device 31 for the identification information of the communication device 31 (steps S401 and S403). In addition, the communication device information management unit 331 also includes identification information of the base station device 20 to which each communication device 31 is wirelessly connected to each communication device 31, and communication quality (received power, data amount, data amount) of the wireless communication path. Information such as the number of retransmissions, error rate, S / N ratio, etc., frequency band used, channel, etc. is also requested.
The communication device information management unit 331 acquires information such as identification information of the communication device 31, identification information of the base station device 20, communication quality information of the wireless communication path, frequency used, channel, etc. from each communication device 31 (step). S402, S404).
Next, the communication device information management unit 331 terminals the information acquired from each communication device 31, the identification information of the radio device 32, and the identification information of the wireless terminal device 30 via the data transmission unit 36 and the communication device 31. It is transmitted to the communication management device 10 as an identification information notification (step S405).
The communication device information management unit 331 may transmit the terminal identification information notification using a plurality of wireless communication paths in which the terminal identification information is set between the terminal identification information and the base station device 20, or one radio. The terminal identification information notification may be transmitted using only the communication path.

In the communication management device 10, the data receiving unit 18 receives the terminal identification information notification, and the terminal information management unit 11 stores the terminal identification information notification as terminal information in the main storage device 802 or the auxiliary storage device 803. The communication management device 10 can reliably recognize the radio device 32 and the communication device 31 mounted on the wireless terminal device 30 by the terminal identification information notification. Further, the communication management device 10 can also recognize the base station device 20 to which each communication device 31 is wirelessly connected, the communication quality of the wireless communication path, the frequency band used, the channel, and the like by the terminal identification information notification. In this way, the communication management device 10 can recognize the base station device 20 in which the wireless communication path is set for each communication device 31 by the terminal identification information notification. Therefore, the terminal identification information notification is the setting notification information. Functions as. Further, since the communication management device 10 can recognize the performance of the wireless communication path set between the communication device 31 and the base station device 20 by the terminal identification information notification, the terminal identification information notification is a performance. Functions as notification information.
Further, in the communication management device 10, among the terminal identification information, the identification information of the base station device 20, the communication quality of the wireless communication path (received power, data amount, number of retransmissions, error rate, S / N ratio, etc.), Information such as the frequency band used and channels is stored in the main storage device 802 or the auxiliary storage device 803 as base station information by the base station information management unit 12. Therefore, the terminal identification information also functions as base station information.

FIG. 5 shows a communication sequence performed when the communication management device 10 extracts the insufficient base station device.
Since steps S401 to S405 are the same as those shown in FIG. 4, detailed description thereof will be omitted.

Based on the terminal identification information notification received from the wireless terminal device 30, the communication management device 10 determines whether or not there is a shortage of base station devices in the plurality of base station devices 20 to which the wireless terminal device 30 is wirelessly connected. When it is determined that the insufficient base station apparatus exists, the communication management apparatus 10 selects the alternative base station apparatus and transmits the alternative base station notification to the base station apparatus 20 determined to be the insufficient base station apparatus (step S501). ..
The base station device 20 determined to be the insufficient base station device receives the alternative base station notification. The base station device 20 determined to be the insufficient base station device transmits a connection refusal notification to the wireless terminal device 30 (step S502).
Upon receiving the connection refusal notice, the wireless terminal device 30 switches the connection destination of the communication device 31 wirelessly connected to the insufficient base station device to the alternative base station device indicated in the identification information included in the connection refusal notice (step S503). ).

Next, the procedure for extracting the insufficient base station device and selecting the alternative base station device in the communication management device 10 will be described.
FIG. 14 is a flowchart showing a procedure for extracting a shortage base station device and selecting an alternative base station device in the communication management device 10.

First, in step S1401, the determination unit 161 of the connection management unit 16 analyzes the terminal identification information notification and evaluates the performance of the wireless communication path for each base station device 20 to which the wireless terminal device 30 is wirelessly connected. .. Parameters representing the performance of the wireless communication path are set by the system designer.
The determination unit 161 extracts the base station device 20 whose wireless communication path performance does not meet the predetermined performance standard as the insufficient base station device.

As described above, the performance of the wireless communication path is, for example, communication quality such as received power, error rate, and S / N ratio (signal-noise ratio).

In addition to the communication quality, for example, the determination unit 161 may use the load of the base station device 20 as a parameter representing the performance of the wireless communication path. As the load of the base station device 20, the amount of data per unit time, the load of the CPU that controls the base station device 20, the amount of buffer used by the communication device of the base station device 20, and the like can be considered.

Further, the determination unit 161 may use the effect of redundancy as a parameter representing the performance of the wireless communication path. The effect of redundancy (reliability of redundancy) may change if the frequency band used by the communication device 31 is different, and may change if the channel is different even in the same frequency band.

Further, the determination unit 161 may use the positional relationship between the wireless terminal device 30 and the base station device 20 as a parameter representing the performance of the wireless communication path. Specifically, the determination unit 161 has a positional relationship between the wireless terminal device 30 and the base station device 20 such as a point A (base station device) centered on the point O (where the wireless terminal device 30 is located) shown in FIG. (1) It is conceivable to use the angle information of the angle AOB formed by the point B (where the base station apparatus (N) 22 is located) and the point B (where 21 is located).
From the viewpoint of reliability of redundancy, it is desirable that a plurality of base station devices 20 to be connected to the wireless connection of the wireless terminal device 30 are scattered around the wireless terminal device 30. For example, when there are two redundant wireless communication paths, it is most reliable if the two base station devices 20 are arranged so that the angle formed by the two base station devices 20 centered on the wireless terminal device 30 is 180 degrees. Highly sex. When there are three redundant wireless communication paths, it is best to arrange the three base station devices 20 so that the angles formed by the three base station devices 20 centered on the wireless terminal device 30 are 120 degrees and 240 degrees. Highly reliable. In this way, the determination unit 161 extracts the insufficient base station device by paying attention to whether or not the plurality of base station devices 20 to be connected are scattered around the wireless terminal device 30, so that communication is performed due to the presence of a shield. Is less likely to become unstable.

The determination unit 161 can extract the insufficient base station device by combining a plurality of parameters representing the performance of these wireless communication paths. It is assumed that the information of the parameters representing the performance of these wireless communication paths is periodically collected as the base station information by the base station information management unit 12.

If there is a missing base station device among the plurality of base station devices 20 to which the wireless terminal device 30 is wirelessly connected (YES in step S1402), the process proceeds to step S1403. On the other hand, when the insufficient base station apparatus does not exist (NO in step S1402), the process ends.

In step S1403, the selection unit 162 determines whether or not the alternative base station apparatus can be selected (step S1403).
That is, the determination unit 161 refers to the base station information managed by the base station information management unit 12, and the wireless terminal device 30 is among the base station devices 20 to which the wireless terminal device 30 is not wirelessly connected at the present time. It is determined whether or not there is a base station device 20 that can be wirelessly connected and whose performance of the wireless communication path satisfies the performance standard.
If the alternative base station apparatus can be selected (YES in step S1403), the process proceeds to step S1404. On the other hand, if the alternative base station apparatus cannot be selected (NO in step S1403), the process proceeds to step S1407.

In step S1404, the selection unit 162 selects an alternative base station apparatus to replace the missing base station apparatus.
When there are a plurality of candidates for the alternative base station device, the selection unit 162 selects the candidate for the alternative base station device having the best performance of the wireless communication path as the alternative base station device.
The selection unit 162 combines a plurality of parameters (communication quality, load of the base station device 20, the effect of redundancy, and the positional relationship between the wireless terminal device 30 and the base station device 20) representing the performance of the wireless communication path described above. You can select an alternative base station device.

Next, in step S1405, the instruction unit 163 generates an alternative base station notification.
Then, in step S1406, the instruction unit 163 transmits the generated alternative base station notification to the insufficient base station apparatus via the data transmission unit 17.

If NO is determined in step S1403, the selection unit 162 performs default error processing (step S1407).

As shown in FIG. 5, the insufficient base station apparatus that has received the alternative base station notification transmits the connection refusal notification to the wireless terminal apparatus 30.
The wireless terminal device 30 that has received the connection refusal notice sets a wireless communication path with the alternative base station device instead of the insufficient base station device based on the identification information of the alternative base station device included in the connection refusal notice.

In the above, the example in which the communication management device 10 transmits the alternative base station notification to the shortage base station device and the shortage base station device sends the connection refusal notification to the wireless terminal device 30 has been described. Instead, the communication management device 10 transmits the alternative base station notification to the base station device 20 other than the insufficient base station device, and the base station device 20 that receives the alternative base station notification sends a connection refusal notice to the wireless terminal device 30. You may send it. Further, the communication management device 10 may transmit the alternative base station notification to the alternative base station, and the alternative base station may transmit the connection refusal notification to the wireless terminal device 30.

Further, in the above, the wireless terminal device 30 uses the identification information of the base station device 20, information on the communication quality of the wireless communication path (received power, data amount, number of retransmissions, error rate, S / N ratio, etc.), frequency band used. , An example of transmitting terminal identification information including information such as a channel to the communication management device 10 has been described. Instead of this, each base station device 20 may transmit these information as base station information to the communication management device 10.

*** Explanation of the effect of the embodiment ***
In the present embodiment, since the communication management device 10 monitors the performance of each wireless communication path, it is possible to switch the wireless communication path having deteriorated performance to the wireless communication path having good performance.
That is, the wireless terminal device 30 cannot grasp the overall status of the wireless communication system, and cannot determine the wireless communication path having good performance. In the present embodiment, the communication management device 10 can grasp the overall status of the wireless communication system and determine a wireless communication path having good performance. As a result, it becomes possible to maximize the reliability by distributing the load of the entire wireless communication system and making it redundant.

Embodiment 2.
In the first embodiment, the wireless terminal device 30 is equipped with one wireless device 32 including a plurality of communication devices 31. However, there are few radios 32 that support redundancy. Further, when it is desired to increase the number of redundancy, it may be difficult in terms of cost to develop the radio 32 with the increased number of redundancy. Therefore, it is conceivable to mount a plurality of radios 32 on the wireless terminal device 30.
In the present embodiment, a configuration in which a plurality of radios 32 exist in the wireless terminal device 30 will be described.
In this embodiment, the difference from the first embodiment will be mainly described.
The matters not explained below are the same as those in the first embodiment.

*** Explanation of configuration ***
FIG. 7 shows an example of the functional configuration of the wireless terminal device 30 according to the present embodiment.

The wireless terminal device 30 according to the present embodiment is roughly classified into a wireless communication device 34 and a lower device 35.
Since the lower device 35 is the same as that shown in FIG. 3, detailed description thereof will be omitted.

The wireless communication device 34 has a plurality of radios 32 shown in FIG.
In FIG. 7, the radio (1) 321 and the radio (X) 322 are shown as the radio 32, but the radio terminal device 30 includes a radio other than the radio (1) 321 and the radio (X) 322. It is assumed that 32 exists.
Each radio 32 has an internal configuration shown in FIG. That is, each radio 32 has a plurality of communication devices 31 shown in FIG. 3, a communication device control unit 33, a data transmission unit 36, and a data reception unit 37. As shown in FIG. 3, the communication device control unit 33 includes a communication device information management unit 331, a base station information management unit 332, a replication information management unit 333, a destination determination unit 334, and a connection destination determination unit 335 as internal configurations. exist.

Further, the wireless communication device 34 has a data transmission unit 361 and a data reception unit 371.
The data transmission unit 361 performs the same operation as the data transmission unit 36 shown in FIG. Further, the data receiving unit 371 operates in the same manner as the data receiving unit 37 shown in FIG.

Further, the wireless communication device 34 has a wireless device control unit 39.
The radio control unit 39 includes a radio information management unit 391, a base station information management unit 392, a replication information management unit 393, a destination determination unit 394, a connection destination determination unit 395, and a radio information acquisition unit 396.
The radio device information acquisition unit 396 includes information on the communication device 31 managed by the communication device information management unit 331 of each radio device 32 from each radio device 32, and a base station device managed by the base station information management unit 332. The information of 20 and the duplication information managed by the duplication information management unit 333 are acquired as radio equipment information.
Then, the information of the communication device 31 in the radio device information acquired by the radio device information acquisition unit 396 is managed by the radio device information management unit 391. Further, the information of the base station device 20 in the radio equipment information acquired by the radio equipment information acquisition unit 396 is managed by the base station information management unit 392. Further, the duplicated information in the radio equipment information acquired by the radio equipment information acquisition unit 396 is managed by the duplicate information management unit 393.
The destination determination unit 394 operates in the same manner as the destination determination unit 334 shown in FIG. The connection destination determination unit 395 performs the same operation as the connection destination determination unit 335 shown in FIG.

*** Explanation of operation ***
Next, the communication sequence according to the present embodiment will be described.
8 and 9 show a communication sequence for the wireless terminal device 30 to transmit the information of the communication device 31 of each radio device 32 to the communication management device 10. The communication sequence shown in FIG. 8 is periodically repeated.

First, the radio information acquisition unit 396 requests the communication device control unit 33 of each radio device 32 for the identification information of the communication device 31 mounted on each radio device 32 (steps S801 and S802). In addition, the radio information acquisition unit 396 also identifies the base station device 20 to which the communication device 31 mounted on each radio 32 is wirelessly connected to the communication device control unit 33 of each radio 32. Information such as information, communication quality of wireless communication path (received power, data amount, number of retransmissions, error rate, S / N ratio, etc.), frequency band used, channel, etc. is also requested.

In the communication device control unit 33 of each radio device 32, the communication device information management unit 331 requests each communication device 31 for identification information and the like of the communication device 31 (steps S803, S805, S807, S809). Since steps S803, S805, S807 and S809 are the same as steps S401 and S403 in FIG. 4, detailed description thereof will be omitted.
Further, the communication device information management unit 331 acquires the identification information of the communication device 31 and the like from each communication device 31 (steps S804, S806, S808, S810). Since steps S804, S806, S808 and S810 are the same as steps S402 and S404 of FIG. 4, detailed description thereof will be omitted.
The radio information acquisition unit 396 acquires identification information and the like of the communication device 31 mounted on each radio 32 from each radio 32 (steps S811, S812).

Next, as shown in FIG. 9, the radio information management unit 391 uses the identification information of the communication device 31 acquired from each radio 32, the identification information of the radio terminal device 30, and the like as terminal identification information notification, and the communication management device 10 (Step S901). Since step S901 is the same as step S405 of FIG. 4, detailed description thereof will be omitted.

Next, as in FIG. 5, when it is determined that the insufficient base station apparatus exists, the communication management apparatus 10 selects the alternative base station apparatus, and the alternative base station notification is the base station determined to be the insufficient base station apparatus. It is transmitted to the device 20 (step S902).
The base station device 20 determined to be the insufficient base station device receives the alternative base station notification. The base station device 20 determined to be the insufficient base station device transmits a connection refusal notification to the wireless terminal device 30 (step S903).
When the wireless terminal device 30 receives the connection refusal notice, the wireless terminal device 30 sets the connection destination of the communication device 31 of the wireless device 32 wirelessly connected to the insufficient base station device to the alternative base station device indicated in the identification information included in the connection refusal notice. Switching (step S904).
Since steps S902 to S904 are the same as steps S501 to S503 of FIG. 5, detailed description thereof will be omitted.

According to the procedure shown in FIGS. 8 and 9, even when a plurality of radios 32 are present in the wireless terminal device 30, the communication management device 10 has the same radios in which the plurality of communication devices 31 mounted on the plurality of radios 32 are the same. It can be recognized that it belongs to the terminal device 30.

Instead of the communication sequences shown in FIGS. 8 and 9, the communication sequences shown in FIGS. 10 and 11 can also be used.
In the communication sequence shown in FIGS. 8 and 9, the radio information management unit 391 uses the identification information of the communication device 31 acquired from each radio 32, the identification information of the wireless terminal device 30, and the like as terminal identification information notifications in the communication management device. It is transmitted to 10 (step S901). On the other hand, in the communication sequence shown in FIGS. 10 and 11, each radio device 32 transmits the identification information of the communication device 31 and the like to the communication management device 10 as a radio device identification information notification (steps S1101 and S1103). Then, the wireless device information management unit 391 notifies the terminal identification information of the information not transmitted in steps S1101 and S1103, specifically, the information about the entire wireless terminal device 30 (for example, the identification information of the wireless terminal device 30). (Step S1105).
In the communication sequences of FIGS. 10 and 11, the radio identification information notification and the terminal identification information notification are transmitted to the communication management device 10 at different timings. Therefore, it is necessary for the communication management device 10 to be able to recognize that the wireless device identification information notification and the terminal identification information notification are the same information about the wireless terminal device 30. For example, each radio 32 sets the same value (for example, a random number value) in each radio identification information notification, and the radio information management unit 391 sets the same value in the terminal identification information notification. By doing so, the communication management device 10 can recognize that the wireless device identification information notification and the terminal identification information notification for which the same value is set are information about the same wireless terminal device 30.

Since steps S1001 to S1010 in FIG. 10 are the same as steps S801 to S810 in FIG. 8, detailed description thereof will be omitted.
Further, since steps S1102 and S1104 of FIG. 11 are the same as steps S811 and S812 of FIG. 8, detailed description thereof will be omitted.
Further, since steps S1106 to S1108 in FIG. 11 are the same as steps S902 to S904 in FIG. 9, detailed description thereof will be omitted.

Further, instead of the communication sequences shown in FIGS. 8 and 9, the communication sequences shown in FIGS. 12 and 13 can be used.
In the communication sequence shown in FIGS. 8 and 9, the radio information acquisition unit 396 requests the communication device control unit 33 of each radio 32 to identify the communication device 31 mounted on each radio 32. (Steps S801 and S802), the replication information management unit 333 requests each communication device 31 for identification information of the communication device 31 and the like based on the request from the radio information acquisition unit 396 (step S803, S802). S805, S807, S809).
.. On the other hand, in the communication sequences shown in FIGS. 12 and 13, the communication device control unit 33 sends the identification information of the communication device 31 to each communication device 31 without a request from the radio information acquisition unit 396. (Steps S1201, S1203, S1205, S1207).
Further, in the communication sequences shown in FIGS. 12 and 13, similarly to the communication sequences shown in FIGS. 10 and 11, each radio device 32 uses the identification information of the communication device 31 and the like as the radio device identification information notification, and the communication management device 10 (Steps S1209, S1211). Then, the radio information management unit 391 uses the information not transmitted in steps S1209 and S1211, specifically, the information about the entire wireless terminal device 30 (for example, the identification information of the wireless terminal device 30) as the terminal identification information. Transmission (step S1301 in FIG. 13).
Since steps S1201 to S1208 in FIG. 12 are the same as steps S1003 to S1010 in FIG. 10, detailed description thereof will be omitted.
Further, since steps S1209 and S1211 in FIG. 12 are the same as steps S1101 and S1103 in FIG. 11, detailed description thereof will be omitted.
Further, since steps S1210 and S1212 in FIG. 12 are the same as steps S1001 and S1002 in FIG. 10, detailed description thereof will be omitted.
Further, since steps S1213 and S1214 in FIG. 12 are the same as steps S1102 and S1104 in FIG. 11, detailed description thereof will be omitted.
Further, since steps S1301 to S1304 in FIG. 13 are the same as steps S1105 to S1108 in FIG. 11, detailed description thereof will be omitted.

*** Explanation of the effect of the embodiment ***
As described above, according to the present embodiment, even when a plurality of wireless devices 32 are mounted on the wireless terminal device 30, the communication management device 10 is mounted on the same wireless terminal device 30 with the plurality of wireless devices 32. You can recognize that it is done. As a result, even when a plurality of wireless devices 32 are mounted on the wireless terminal device 30, the communication management device 10 can grasp the overall status of the wireless communication system and determine a wireless communication path having good performance. can.
Further, in the present embodiment, it is possible to realize the wireless terminal device 30 in which a plurality of wireless devices 32 are mounted while minimizing the change of the wireless terminal device 30.

Although the first and second embodiments have been described above, the two embodiments may be combined and implemented.
Alternatively, one of these two embodiments may be partially implemented.
Alternatively, these two embodiments may be partially combined and implemented.
In addition, the configurations and procedures described in these two embodiments may be changed as necessary.

*** Supplementary explanation of hardware configuration ***
Finally, a supplementary explanation of the hardware configurations of the communication management device 10 and the wireless terminal device 30 will be given.

The processor 801 shown in FIG. 15 is an IC (Integrated Circuit) that performs processing.
The processor 801 is a CPU, a DSP (Digital Signal Processor), or the like.
The main storage device 802 shown in FIG. 15 is a RAM (Random Access Memory).
The auxiliary storage device 803 shown in FIG. 15 is a ROM (Read Only Memory), a flash memory, an HDD (Hard Disk Drive), or the like.
The communication device 804 shown in FIG. 15 is an electronic circuit that executes communication processing.
The communication device 804 is, for example, a communication chip or a NIC (Network Interface Card).

In addition, the OS (Operating System) is also stored in the auxiliary storage device 803.
Then, at least a part of the OS is executed by the processor 801.
The processor 801 executes at least a part of the OS, and while executing at least a part of the OS, the terminal information management unit 11, the base station information management unit 12, the replication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, and the data transmission unit. A program that realizes the functions of the 17 and the data receiving unit 18 is executed.
When the processor 801 executes the OS, task management, memory management, file management, communication control, and the like are performed.
Further, the processing results of the terminal information management unit 11, the base station information management unit 12, the replication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, the data transmission unit 17, and the data reception unit 18 are displayed. At least one of the indicated information, data, signal value and variable value is stored in at least one of the main storage device 802, the auxiliary storage device 803, the register and the cache memory in the processor 801.
Further, the functions of the terminal information management unit 11, the base station information management unit 12, the duplication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, the data transmission unit 17, and the data reception unit 18 are realized. The program may be stored on a portable recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD. Then, the functions of the terminal information management unit 11, the base station information management unit 12, the replication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, the data transmission unit 17, and the data reception unit 18 are realized. A portable recording medium in which the program is stored may be distributed.

Further, the "units" of the terminal information management unit 11, the base station information management unit 12, the replication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, the data transmission unit 17, and the data reception unit 18 are , "Circuit" or "process" or "procedure" or "processing" or "circuit Lee".
Further, the communication management device 10 may be realized by a processing circuit. The processing circuit is, for example, a logic IC (Integrated Circuit), a GA (Gate Array), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate Array).
In this case, the terminal information management unit 11, the base station information management unit 12, the replication information management unit 13, the data processing unit 14, the destination determination unit 15, the connection management unit 16, the data transmission unit 17, and the data reception unit 18, respectively. Realized as part of the processing circuit.
In this specification, the superordinate concept of the processor and the processing circuit is referred to as "processing circuit Lee".
That is, the processor and the processing circuit are specific examples of the "processing circuit Lee", respectively.

Similarly, the processor 901 shown in FIG. 16 is an IC that performs processing.
The processor 901 is a CPU, a DSP, or the like.
The main storage device 902 shown in FIG. 16 is a RAM.
The auxiliary storage device 903 shown in FIG. 16 is a ROM, a flash memory, an HDD, or the like.
The communication device 31 shown in FIG. 16 is an electronic circuit that executes data communication processing.
The communication device 31 is, for example, a communication chip or a NIC.

The OS is also stored in the auxiliary storage device 903.
Then, at least a part of the OS is executed by the processor 901.
The processor 901 executes a program that realizes the functions of the communication device control unit 33, the data transmission unit 36, and the data reception unit 37 while executing at least a part of the OS.
When the processor 901 executes the OS, task management, memory management, file management, communication control, and the like are performed.
Further, at least one of the information, data, signal value, and variable value indicating the processing result of the communication device control unit 33, the data transmission unit 36, and the data reception unit 37 is the main storage device 902, the auxiliary storage device 903, and the processor 901. It is stored in at least one of the registers and cache memory in.
The programs that realize the functions of the communication device control unit 33, the data transmission unit 36, and the data reception unit 37 are portable recording media such as magnetic disks, flexible disks, optical disks, compact disks, Blu-ray (registered trademark) disks, and DVDs. It may be stored in. Then, a portable recording medium in which a program that realizes the functions of the communication device control unit 33, the data transmission unit 36, and the data reception unit 37 is stored may be distributed.

Further, the "unit" of the communication device control unit 33, the data transmission unit 36, and the data reception unit 37 may be read as "circuit" or "process" or "procedure" or "processing" or "circuit Lee".
Further, the wireless terminal device 30 may be realized by a processing circuit. The processing circuit is, for example, a logic IC, GA, ASIC, or FPGA.
In this case, the communication device control unit 33, the data transmission unit 36, and the data reception unit 37 are each realized as a part of the processing circuit.
As described above, the superordinate concept of the processor and the processing circuit is referred to as "processing circuit Lee".
That is, the processor and the processing circuit are specific examples of the "processing circuit Lee", respectively.

10 communication management device, 11 terminal information management unit, 12 base station information management department, 13 replication information management department, 14 data processing unit, 15 destination determination unit, 16 connection management unit, 17 data transmission unit, 18 data reception unit, 20 Base station device, 21 base station device (1), 22 base station device (N), 30 wireless terminal device, 31 communication device, 32 wireless device, 33 communication device control unit, 34 wireless communication device, 35 lower device, 36 data Transmitter, 37 data receiver, 39 radio control unit, 40 network, 100 wireless communication system, 161 judgment unit, 162 selection unit, 163 indicator unit, 311 communication device (1), 312 communication device (M), 321 wireless Machine (1), 322 Radio (X), 331 Communication device information management unit, 332 Base station information management unit, 333 Duplicate information management unit, 334 Destination determination unit, 335 Connection destination determination unit, 361 Data transmission unit, 371 data Receiver, 391 wireless device information management unit, 392 base station information management unit, 393 duplicate information management unit, 394 destination determination unit, 395 connection destination determination unit, 396 wireless device information acquisition unit, 801 processor, 802 main storage device, 803 Auxiliary storage device, 804 communication device, 901 processor, 902 main storage device, 903 auxiliary storage device, 2010 communication range, 2020 communication range.

Claims (6)

Insufficient bases that are base station devices whose performance of the wireless communication path to and from the wireless terminal device does not meet the predetermined performance standard for a plurality of base station devices in which a wireless communication path is set between the wireless terminal device and the device. A determination unit that determines whether or not a station device exists, and
When the shortage base station device is present in the plurality of base station devices, a selection unit that selects a base station device other than the plurality of base station devices as an alternative base station device, and a selection unit.
A communication management device having an instruction unit instructing the wireless terminal device to set a wireless communication path between the wireless terminal device and the alternative base station device in place of the insufficient base station device. The selection unit
The communication management device according to claim 1, wherein a base station device whose performance of a wireless communication path set between the wireless terminal device and the wireless terminal device satisfies the performance standard is selected as the alternative base station device. The determination unit
The performance notification information for notifying the performance of each of the plurality of wireless communication paths set between the wireless terminal device and the plurality of base station devices is acquired, and the performance notification information is analyzed to analyze the plurality of bases. The communication management device according to claim 1, wherein it is determined whether or not the insufficient base station device exists in the station device. The wireless terminal device includes a plurality of communication devices, and a wireless communication path is set between each communication device and a different base station device.
The determination unit
The setting notification information for notifying the base station device for which the wireless communication path is set is acquired for each communication device of the wireless terminal device, the setting notification information is analyzed to recognize the plurality of base station devices, and the plurality of base station devices are recognized. The communication management device according to claim 1, wherein it is determined whether or not the insufficient base station device is present in the base station device. A computer is a base station device in which a wireless communication path is set up with a wireless terminal device, and the performance of the wireless communication path with the wireless terminal device does not meet a predetermined performance standard. Determine if a missing base station device exists and
When the shortage base station device is present in the plurality of base station devices, the computer selects a base station device other than the plurality of base station devices as an alternative base station device.
A communication management method in which the computer instructs the wireless terminal device to set a wireless communication path between the wireless terminal device and the alternative base station device in place of the shortage base station device. Insufficient bases that are base station devices whose performance of the wireless communication path to and from the wireless terminal device does not meet the predetermined performance standard for a plurality of base station devices in which a wireless communication path is set between the wireless terminal device and the device. Judgment processing to determine whether or not a station device exists, and
When the shortage base station device is present in the plurality of base station devices, a selection process for selecting a base station device other than the plurality of base station devices as an alternative base station device, and
A communication management program that causes a computer to execute an instruction process instructing the wireless terminal device to set a wireless communication path between the wireless terminal device and the alternative base station device in place of the insufficient base station device.

Images