JP2020120317A - Communication emulation method, communication emulation system, control node device, and transmission node device - Google Patents

Abstract

To realize a wireless traffic emulation system for evaluating an appropriate wireless environment even in a wireless environment where many wireless devices are installed.SOLUTION: In a wireless traffic emulation system 1000, a traffic scenario that manages all the contents of traffic transmitted by a plurality of transmission node devices is created, and each transmission node device transmits traffic to a radio communicable range of a wireless communication system according to the individual traffic for each transmission node device generated on the basis of the traffic scenario. That is, in the wireless traffic emulation system, it is easy to introduce the plurality of transmission node devices, and the traffic scenario and the individual traffic scenario enable individual management of the traffic wirelessly transmitted from each transmission node device and traffic management of the entire system easily.SELECTED DRAWING: Figure 1

Description

The present invention relates to wireless communication technology, and more particularly to technology for traffic emulation.

The introduction of IoT (Internet of Things) devices into indoor environments such as factories, hospitals, and commercial facilities is progressing for the purpose of grasping and controlling the operating conditions of various devices.

For example, there is a case where it is desired to introduce a new wireless device into an existing wireless environment, such as a case where the production line already existing in a factory is left as it is and a production line is newly provided to increase the production capacity. In such a case, the addition of a device may cause a new interference or the like, which may deteriorate the communication quality of the existing wireless device, and at the same time, the added device may not have a sufficient communication quality. May not be achieved. In order to deal with such a problem, a technology that can test whether existing devices or additional devices can communicate with sufficient quality in advance by the simplest possible method before actually introducing new wireless devices. Is eagerly awaited.

For example, Patent Literature 1 discloses a technique of introducing an evaluation device simulating a part of a mobile communication system to perform traffic evaluation in the mobile communication system. According to the technique of Patent Document 1, when an actual mobile terminal is connected to the evaluation device and predetermined communication (for example, Internet access or communication by FTP) is performed from the mobile terminal, the actual communication is performed. Traffic evaluation can be performed in the mobile communication system.

JP, 2008-22388, A

However, in the technique of Patent Document 1 described above, when the number of mobile terminals is increased and traffic evaluation is performed, it is necessary to provide as many radio access protocol simulation units as the number of mobile terminals in the evaluation device. Therefore, it is difficult for the technique of Patent Document 1 to appropriately perform traffic evaluation in a wireless environment in which a large number of IoT devices are introduced.

Further, in a wireless environment in which a large number of IoT devices are installed, there are cases where it is desired to generate traffic that simulates a situation in which communication is performed between a plurality of nodes, or where it is desired to transmit traffic by linking a plurality of nodes. In order to appropriately evaluate the wireless environment in such a case, it is necessary to appropriately control the transmission timing of each transmission node so that the transmission timing does not shift between the transmission nodes.

Furthermore, in addition to performing transmission according to a predetermined traffic pattern, it may be desirable to dynamically generate traffic in accordance with changes in the status of the wireless environment (for example, changes in the amount of traffic generated by existing terminals). A mechanism for realizing such dynamic traffic generation is required.

Therefore, in view of the above-mentioned problems, the present invention prevents the occurrence of a shift in the transmission timing between a plurality of transmission nodes in order to perform an appropriate evaluation of the wireless environment even in a wireless environment in which a large number of wireless devices are introduced. A communication emulation method, a communication emulation system, a control node device, and a control node device capable of appropriately controlling the transmission timing of a transmission node and dynamically generating traffic according to changes in the wireless environment , And to realize a transmitting node device.

In order to solve the above problems, the first invention adds a control node device and N (N: natural number) transmission node devices to a wireless communication system including a communication device capable of performing wireless communication. A communication emulation method executed by a configuration, comprising a traffic scenario generation step, an individual traffic scenario generation step, an individual traffic scenario transmission step, an instruction signal transmission step, and a wireless transmission step.

In the traffic scenario generation step, the control node device generates a traffic scenario in which information on the traffic to be transmitted by the N transmission node devices can be derived.

In the individual traffic scenario generation step, the control node device, based on the traffic scenario, is a kth transmission node device (k: natural number, 1≦k≦, which is the kth transmission node device included in the N transmission node devices). N) generates an individual traffic scenario for the k-th transmission node device, which is an individual traffic scenario including information on traffic to be transmitted.

In the individual traffic scenario transmission step, the control node device transmits data including the individual traffic scenario for the kth transmission node device to the kth transmission node device via the high level communication path.

In the instruction signal transmitting step, the control node device transmits an instruction signal for instructing the transmission of the traffic for the kth transmission node device to the kth transmission node device via the low level communication path.

In the wireless transmission step, when the k transmission node device receives the instruction signal, the k transmission node device generates a wireless signal including transmission data generated based on the individual traffic scenario for the kth transmission node device, and generates the wireless signal. The wireless signal is transmitted to the wireless communication range of the wireless communication system.

In this communication emulation method, a traffic scenario that manages all the contents of traffic transmitted by a plurality of transmission node devices is created, and each transmission node device is created according to the individual traffic for each transmission node device generated based on the traffic scenario. Transmits the traffic to the wireless communication range of the wireless communication system. That is, in this communication emulation method, it is easy to introduce a plurality of transmission node devices, and the traffic scenario and the individual traffic scenario enable individual management of traffic wirelessly transmitted from each transmission node device and traffic management of the entire system. You can easily. Therefore, according to this communication emulation method, it is possible to easily emulate a wireless environment in which a large number of wireless devices are installed and a wireless environment in which a plurality of wireless devices are installed. As a result, this communication emulation method can appropriately evaluate the wireless communication environment when a predetermined traffic load is applied to the wireless communication system.

A second aspect of the invention is the first aspect of the invention, in which the control node device and the N transmission node devices are connected via independent low-level communication paths.

In the instruction signal transmitting step, the control node device transmits the instruction signal to each of the N transmission node devices at an independent timing.

As a result, in this communication emulation method, the timing of traffic transmission of the N transmission node devices can be adjusted in a wide range. In addition, since the traffic transmission timing of each transmitting node device can be adjusted by transmitting/receiving the instruction signal via the low-level communication path, for example, the situation of the wireless communication environment when a large number of transmitting node devices cooperate to communicate And can be properly emulated.

3rd invention is 1st or 2nd invention, A traffic scenario is data containing the information of the traffic which N transmission node apparatuses should transmit.

Thereby, the traffic scenario can include the information of the traffic to be transmitted by the N transmission node devices as it is.

A fourth invention is any one of the first to third inventions, and the individual traffic scenario is data derived by performing a predetermined calculation on the traffic scenario.

This allows traffic scenarios to be simple data.

A fifth invention is any one of the first to fourth inventions, and the individual traffic scenario is composed of one or a plurality of row data.

The row data is data corresponding to one wireless signal transmission process executed in the wireless transmission step, and includes, for each row data, a traffic ID that is an identifier that uniquely identifies the row data.

Accordingly, the traffic ID makes it possible to easily specify the one-time wireless signal transmission processing executed or executed in the wireless transmission step.

A sixth invention is the fifth invention, and when the wireless transmission step is completed, the transmission node device transmits to the control node device data including a traffic ID corresponding to the executed wireless transmission process, The method further comprises a traffic ID transmitting step of transmitting via the high level communication path.

As a result, the control node device can easily understand which wireless transmission process has been executed by which transmitting node device.

7th invention is 5th or 6th invention, Comprising: The transmission node apparatus is provided with the queue memory which manages the row data of an individual traffic scenario, and is further provided with the data queuing step.

In the data queuing step, when the transmitting node device receives the individual traffic scenario from the control node device, the row data included in the received individual traffic scenario is added to the queue memory.

Thereby, the transmitting node device can manage the individual traffic scenario transmitted from the control node device by the queue memory.

An eighth invention is the seventh invention, further comprising a row data deleting step.

In the row data deleting step, when the wireless transmitting step is completed, the transmitting node device deletes the row data including the traffic ID corresponding to the executed wireless transmitting process from the queue memory, to the control node device.

With this, the transmission node device may perform the wireless transmission processing corresponding to the row data of the first row of the queue memory each time the instruction signal is received, so that the processing in the transmission node device is simplified and the processing is performed. The delay can also be minimal.

A ninth invention is the invention according to any one of the first to eighth inventions, further comprising a wireless environment condition acquisition step and a traffic scenario updating step.

In the wireless environment status acquisition step, the wireless environment status of the wireless communication system is acquired.

In the traffic scenario updating step, if it is determined that the wireless communication load in the wireless environment status acquired in the wireless environment status acquiring step is increased, the traffic scenario is set so that the traffic wirelessly transmitted from the transmitting node device increases. Update the contents of.

As a result, the traffic load can be changed according to the wireless environment condition. As a result, it is possible to appropriately evaluate the wireless environment according to the wireless environment status.

A tenth aspect of the present invention is a communication emulation system for applying a predetermined traffic load to a wireless communication system including a communication device capable of wireless communication, the control node device and N (N: natural number) ) Transmission node device.

The control node device further includes a traffic scenario generation processing unit, a high level communication interface, and a low level communication interface.

The traffic scenario generation processing unit generates a traffic scenario in which the information of the traffic to be transmitted by the N transmission node devices is generated, and based on the traffic scenario, the k-th transmission node device includes the k-th transmission node device. An individual traffic scenario for the kth transmission node device, which is an individual traffic scenario including information on traffic to be transmitted by the kth transmission node device (k: natural number, 1≦k≦N), which is the th transmission node device, is generated.

The high level communication interface transmits data including the individual traffic scenario for the kth transmission node device to the kth transmission node device via the high level communication path.

The low level communication interface transmits, to the kth transmission node device, an instruction signal for instructing transmission of traffic for the kth transmission node device via the low level communication path.

The transmission node device includes a high level communication interface, a low level communication interface, and a wireless transmission processing unit.

The high level communication interface receives data including the individual traffic scenario from the control node device via the high level communication path.

The low level communication interface receives an instruction signal for instructing transmission of traffic from the control node device via the low level communication path.

When receiving the instruction signal, the wireless transmission processing unit generates a wireless signal including the transmission data generated based on the individual traffic scenario, and transmits the generated wireless signal to the wireless communicable range of the wireless communication system.

This makes it possible to realize a communication emulation system that achieves the same effects as the first aspect of the invention.

An eleventh invention is a control node device used in the communication emulation system according to the tenth invention.

As a result, the control node device used in the communication emulation system according to the tenth invention can be realized.

A twelfth invention is a transmission node device used in the communication emulation system according to the tenth invention.

As a result, the transmission node device used in the communication emulation system according to the tenth invention can be realized.

According to the present invention, even in a wireless environment in which a large number of wireless devices are installed, in order to perform an appropriate evaluation of the wireless environment, the transmission of each transmitting node is prevented so that there is no shift in the transmission timing among a plurality of transmitting nodes. Communication emulation method, communication emulation system, control node device, and transmission node device capable of appropriately controlling timing and dynamically generating traffic according to changes in the wireless environment Can be realized.

1 is a schematic configuration diagram of a wireless traffic emulation system 1000 according to a first embodiment. 1 is a schematic configuration diagram of a control node device 100 according to a first embodiment. 3 is a schematic configuration diagram of a transmission node device Tx_node1 according to the first embodiment. FIG. The processing sequence figure of wireless traffic emulation system 1000. The processing sequence figure of wireless traffic emulation system 1000. The figure which shows an example (traffic scenario A) of a traffic scenario. The figure which shows an example of an individual traffic scenario and a scenario queue. The figure which shows an example of a traffic scenario (traffic scenario A'). The figure which shows an example of an individual traffic scenario and a scenario queue. The figure which shows an example of the traffic scenario (meta-traffic scenario B) used in the 1st modification of 1st Embodiment. The figure which shows an example of the traffic scenario (meta-traffic scenario C) used in the 2nd modification of 1st Embodiment. The schematic block diagram of the wireless traffic emulation system 1000 which concerns on the 3rd modification of 1st Embodiment, the wireless communication system Sys1, and the wireless quality analysis system Sys2. The figure which shows a CPU bus structure.

[First Embodiment]
The first embodiment will be described below with reference to the drawings.

<1.1: Configuration of wireless traffic emulation system>
FIG. 1 is a schematic configuration diagram of a wireless traffic emulation system 1000 according to the first embodiment.

FIG. 2 is a schematic configuration diagram of the control node device 100 according to the first embodiment.

FIG. 3 is a schematic configuration diagram of the transmission node device Tx_node1 according to the first embodiment.

As shown in FIG. 1, the wireless traffic emulation system 1000 includes a control node device 100 and a plurality of transmission node devices (in FIG. 1, the transmission node device Tx_node1, the transmission node device Tx_node2, and the transmission node device Tx_node3). .. The control node device 100 and the plurality of transmission node devices are connected by a high level communication network (high level communication path). Further, the control node device 100 and the plurality of transmitting node devices are connected by a low level communication network (low level communication path). As shown in FIG. 1, the wireless traffic emulation system 1000 is configured to be added to the existing wireless communication system Sys1 (and the wireless quality analysis system Sys2) to execute the wireless traffic emulation processing. That is, the plurality of transmission node devices of the wireless traffic emulation system 1000 are arranged so as to be able to wirelessly communicate with one or more of the plurality of communication devices (the communication devices St1 to St3 in FIG. 1) included in the wireless communication system Sys1. , Performs wireless traffic emulation processing.

For convenience of description, (1) the wireless traffic emulation system 1000 includes the control node device 100 and three transmission node devices (transmission node device Tx_node1, transmission node device Tx_node2, and transmission node device Tx_node3), (2) The wireless communication system Sys1 includes three communication devices (communication device St1, communication device St2, and communication device St3), and (3) the wireless quality analysis system Sys2 includes three sensor devices (sensor device S_node1, The case where the sensor device S_node2 and the sensor device S_node3) and the analyzer Dev_only are provided will be described below as an example.

(1.1.1: Configuration of control node device)
As shown in FIG. 2, the control node device 100 includes a control node device processing unit 11, a low-level communication interface IF11, and a high-level communication interface IF12.

As shown in FIG. 2, the control node device processing unit 11 includes a traffic scenario generation processing unit 111, a data processing unit 112, and a communication control unit 113. The control node device processing unit 11 can transmit a transmission instruction signal to each transmission node device via the low-level communication interface IF11. Further, the control node device processing unit 11 can perform data communication with each transmitting node device via the high-level communication interface IF12.

The traffic scenario generation processing unit 111 generates a traffic scenario, which is data including information regarding data to be transmitted by wireless communication, from each transmission node device to the communication device of the wireless communication system Sys1. Further, the traffic scenario generation processing unit 111 generates a traffic scenario (individual traffic scenario) for each transmission node device based on the generated traffic scenario, and the generated individual traffic scenario is addressed to the corresponding transmission node device. It is transmitted via the high level communication interface IF12.

Further, the traffic scenario generation processing unit 111 transmits a transmission instruction signal to each transmission node device via the low level communication interface IF11.

The data processing unit 112 executes a process of generating data to be transmitted to the outside via the high level communication interface IF12 and a predetermined process for data received from the outside via the high level communication interface IF12.

The communication control unit 113 determines the timing of transmitting the transmission instruction signal to the predetermined transmission node device via the low-level communication interface IF11, and the transmission instruction signal is transmitted to the predetermined transmission node device at the determined timing. Thus, the low level communication interface IF11 is controlled. Further, the communication control unit 113 controls the high-level communication interface IF12 so that the individual traffic scenario is transmitted to a predetermined transmitting node device at a predetermined timing.

The low-level communication interface IF11 is connected in parallel to each of the transmission node devices Tx_node1 to Tx_node3 via a low-level communication path (low-level communication network Nw2). The low-level communication interface IF11 transmits a transmission instruction signal to a predetermined transmission node device according to an instruction from the communication control unit 113. The low-level communication interface IF11 is realized, for example, as a communication interface for GPIO (General-purpose input/output). Note that "low-level communication" refers to communication in which only the physical layer protocol is specified.

The high-level communication interface IF12 is a communication interface that is connected to a high-level communication path (high-level communication network Nw1) and that performs communication via the high-level communication network Nw1. The high-level communication interface IF12 is realized, for example, as a communication interface for Gigabit Ethernet. The “high-level communication” refers to communication in which a protocol is defined by a plurality of protocol stacks (protocol layers) including a physical layer. That is, “high-level communication” refers to communication in which a protocol is defined not only in the physical layer but also in one or more layers above the data link layer (MAC layer).

(1.1.2: Configuration of transmitting node device)
As shown in FIG. 3, the transmission node device Tx_node1 includes a low-level communication interface IF21, a high-level communication interface IF22, a transmission node device processing unit 21, a storage unit 22, a wireless communication processing unit 23, and an antenna Ant2. With.

The low level communication interface IF21 is connected to the control node device 100 via a low level communication path (low level communication network Nw2). Further, the low-level communication interface IF21 is connected to the transmitting node device processing unit 21. The low-level communication interface IF21 receives the transmission instruction signal transmitted from the control node device 100. The low-level communication interface IF11 is realized, for example, as a GPIO communication interface.

The high-level communication interface IF22 is a communication interface that is connected to a high-level communication path (high-level communication network Nw1) and that performs communication via the high-level communication network Nw1. The high-level communication interface IF22 is realized, for example, as a communication interface for Gigabit Ethernet.

As shown in FIG. 3, the transmission node device processing unit 21 includes a traffic scenario management unit 211, a data processing unit 212, and a communication control unit 213.

The traffic scenario management unit 211 receives the individual traffic scenario for the own device (transmission node device Tx_node1) from the control node device 100 via the high-level communication interface IF22. The traffic scenario management unit 211 manages an individual traffic scenario for its own device (transmission node device Tx_node1) using a scenario queue. The scenario queue is, for example, a queue memory realized by a FIFO and is realized by using the storage unit 22. The traffic scenario management unit 211 can perform data reading and/or writing processing on the storage unit 22.

The data processing unit 212 executes a process of generating data to be transmitted to the outside via the high level communication interface IF22 and a predetermined process for data received from the outside via the high level communication interface IF22. Further, the data processing unit 212 executes a process of generating data to be output to the wireless communication processing unit 23 and a process of data acquired from the wireless communication processing unit 23.

When receiving the transmission instruction signal via the low-level communication interface IF21, the communication control unit 213 outputs a notification signal indicating that the transmission instruction signal has been received, to the data processing unit 212 and the wireless communication processing unit 23, and individually. The predetermined data based on the traffic scenario is controlled by the data processing unit 212, the wireless communication processing unit 23, and the antenna Ant2 so as to be wirelessly transmitted to the outside. The communication control unit 213 controls the high-level communication interface IF22 so that predetermined data is transmitted to the control node device 100 according to an instruction from the traffic scenario management unit 211 and/or the data processing unit 212.

The storage unit 22 executes a predetermined data read/write process according to an instruction from the transmitting node device processing unit 21 and/or each functional unit included in the transmitting node device processing unit 21.

The wireless communication processing unit 23 executes processing for generating a wireless signal (baseband modulation processing, RF modulation processing, etc. for wireless communication processing) on the data output from the transmission node device processing unit 21. , Generate wireless signals. Then, the wireless communication processing unit 23 transmits the generated wireless signal to the outside via the antenna Ant2. Further, the wireless communication processing unit 23 executes wireless signal demodulation processing (RF demodulation processing for wireless communication processing, baseband demodulation processing, etc.) on the wireless signal received by the antenna Ant2, and the wireless signal is transmitted by the wireless signal. Get the data.

The antenna Ant2 is a wireless communication antenna, and is an antenna for transmitting and receiving a wireless communication signal (RF signal).

The transmission node device Tx_node2 and the transmission node device Tx_node3 have the same configuration as the transmission node device Tx_node1.

<<Structure of Wireless Communication System Sys1>>
As shown in FIG. 1, the wireless communication system Sys1 includes a plurality of communication devices each having a wireless communication function (in the case of FIG. 1, the communication device St1, the communication device St2, and the communication device St3). Each of the communication devices St1 to St3 can communicate with another communication device by wireless communication. Further, the wireless communication system Sys1 may include one or a plurality of access points (not shown), and wireless communication can be performed between the access point and the communication devices St1 to St3.

<<Configuration of wireless quality analysis system Sys2>>
As shown in FIG. 1, the wireless quality analysis system Sys2 includes a plurality of sensor devices (in the case of FIG. 1, the sensor device S_node1, the sensor device S_node2, and the sensor device S_node3) and an analysis device Dev_only. The plurality of sensor devices are sensor devices for evaluating the wireless environment of the wireless communication system Sys1 and are installed within a range in which wireless signals used for wireless communication in the wireless communication system Sys1 can be received. The wireless quality analysis system Sys2 is realized, for example, by using the technology disclosed in Japanese Patent Application No. 2018-041562.

The sensor device S_node1 has a function of receiving a wireless signal, acquires data that can be used to evaluate the wireless environment (for example, envelope data or header data of the wireless signal) from the received wireless signal, and acquires the data. The data thus obtained is transmitted to the analyzer Dev_only. The same applies to the sensor device S_node2 and the sensor device S_node3.

The analysis device Dev_only receives data (for example, envelope data or header data of a wireless signal) that can be used for evaluation of the wireless environment transmitted from the sensor devices S_node1 to S_node3. Then, the analysis device Dev_only evaluates the state of the wireless environment of the wireless communication system Sys1 based on the received data.

<1.2: Operation of wireless traffic emulation system>
The operation of the wireless traffic emulation system 1000 configured as above will be described with reference to the drawings.

4 and 5 are processing sequence diagrams of the wireless traffic emulation system 1000.

FIG. 6 is a diagram showing an example of a traffic scenario (traffic scenario A).

FIG. 7 is a diagram showing an example of an individual traffic scenario and a scenario queue.

For convenience of description, in the present embodiment, a case will be described where the wireless traffic emulation system 1000 executes processing according to the traffic scenario A of FIG. Further, it is assumed that the IP addresses of the transmission node devices Tx_node1 to Tx_node3 and the communication devices St1 to St3 are set as follows.
IP address of transmitting node device Tx_node1: 192.168.10.1
IP address of transmitting node device Tx_node2: 192.168.10.2.
IP address of transmitting node device Tx_node3: 192.168.10.3.
Communication device St1 IP address: 192.168.0.1
IP address of communication device St2: 192.168.0.2
IP address of communication device St3: 192.168.0.3
When the IP address of the transmission destination from the transmission node device is set to "192.168.0.255", the transmission node device wirelessly transmits the broadcast packet.

The operation of the wireless traffic emulation system 1000 will be described below with reference to the processing sequence diagrams of FIGS. 4 and 5.

(Step S1):
In step S1, the traffic scenario generation processing unit 111 of the control node device 100 generates a traffic scenario (traffic scenario A shown in FIG. 6).

As shown in FIG. 6, the traffic scenario A is list data, and the data in each row of the traffic scenario A specifies one wireless transmission process. The data in each row of the traffic scenario A is composed of (1) the IP address of the transmission node device, (2) the traffic ID, (3) the destination IP address, and (4) the size of the transmission packet data.

The “IP address of the transmitting node device” is data for specifying the transmitting node device that is the main body of wireless transmission.

The “traffic ID” is data for identifying the wireless transmission process and is a unique ID. Therefore, the corresponding radio transmission process can be uniquely specified by the traffic ID. That is, the traffic ID can specify the IP address, the destination IP address, and the size of the transmission packet data of the transmitting node device that executes (or has executed) the wireless transmission process.

The “destination IP address” is data that specifies the transmission destination of the data included in the wireless signal wirelessly transmitted from the transmission node device.

The “size of transmission packet data” is the size (for example, the unit is bytes) of the packet data included in the radio signal wirelessly transmitted from the transmission node device.

(Steps S21 to S23):
In steps S21 to S23, individual traffic scenario transmission processing (individual traffic scenario generation processing and transmission processing) is executed.

For each transmission node device, the traffic scenario generation processing unit 111 of the control node device 100 extracts, from the traffic scenario A generated in step S1, data in which the IP address of the transmission node device is the same in the data of each row. Generate individual traffic scenarios for.

FIG. 7 shows an individual traffic scenario (individual traffic scenario A1 for the transmitting node device Tx_node1, an individual traffic scenario A2 for the transmitting node device Tx_node2, and an individual traffic scenario A3 for the transmitting node device Tx_node3) generated from the traffic scenario A by this processing. ) Is shown. The individual traffic scenario is acquired for each transmission node device. In the individual traffic scenario, as shown in FIG. 7, the data in each row is composed of (2) traffic ID, (3) destination IP address, and (4) size of transmission packet data.

The individual traffic scenario generated by the traffic scenario generation processing unit 111 of the control node device 100 is transmitted from the control node device 100 to the corresponding transmission node device by the high level communication interface IF12 and the high level communication network Nw2 (eg Giga Ethernet). Be sent via. Specifically, processing is executed as in (1) to (3) below. It is assumed that a connection for high level communication is established in advance between the control node device 100 and the corresponding transmission node device before starting high level communication (for example, a TCP connection is established). Be assumed).
(1) The individual traffic scenario A1 for the transmission node device Tx_node1 (indicated as Tr_scenario (Ex_node1) in FIG. 4) is transmitted from the control node device 100 via the high level communication interface IF12 and the high level communication network Nw2. It is transmitted to Tx_node1. Then, the transmission node device Tx_node1 receives the individual traffic scenario A1 for the transmission node device Tx_node1 transmitted from the control node device 100 via the high level communication interface IF22 of the transmission node device Tx_node1, and the received individual traffic scenario A1 is The traffic scenario management unit 211 of the transmission node device Tx_node1 inputs and manages the scenario queue (for example, a queue memory realized by a predetermined memory area of the storage unit 22 of the transmission node device Tx_node1). For example, the traffic scenario management unit 211 of the transmission node device Tx_node1 adds the received individual traffic scenario A1 to the scenario queue SCque(Tx_node1). The state of the scenario queue SCque (Tx_node1) after the individual traffic scenario A1 is added is shown in the upper right diagram of FIG. In this case, since the scenario queue SCque(Tx_node1) before the addition has no data, the scenario queue SCque(Tx_node1) in FIG. 7 is in a state including only the added individual traffic scenario A1. ..
(2) The individual traffic scenario A2 for the transmission node device Tx_node2 (indicated as Tr_scenario(Ex_node2) in FIG. 4) is transmitted from the control node device 100 via the high level communication interface IF12 and the high level communication network Nw2. It is transmitted to Tx_node2. Then, the transmission node device Tx_node2 receives the individual traffic scenario A2 for the transmission node device Tx_node2 transmitted from the control node device 100 via the high-level communication interface IF22 of the transmission node device Tx_node2, and the received individual traffic scenario A2 is The traffic scenario management unit 211 of the transmission node device Tx_node2 inputs and manages the scenario queue (for example, a queue memory realized by a predetermined memory area of the storage unit 22 of the transmission node device Tx_node2). For example, the traffic scenario management unit 211 of the transmission node device Tx_node2 adds the received individual traffic scenario A2 to the scenario queue SCque(Tx_node2). The state of the scenario queue SCque (Tx_node2) after the individual traffic scenario A2 is added is shown in the middle right diagram of FIG. 7. In this case, since the scenario queue SCque(Tx_node2) before the addition has no data, the scenario queue SCque(Tx_node2) in FIG. 7 is in a state including only the added individual traffic scenario A2. ..
(3) The individual traffic scenario A3 for the transmission node device Tx_node3 (indicated as Tr_scenario (Ex_node3) in FIG. 4) is transmitted from the control node device 100 via the high level communication interface IF12 and the high level communication network Nw2. It is transmitted to Tx_node3. Then, the transmission node device Tx_node3 receives the individual traffic scenario A3 for the transmission node device Tx_node3 transmitted from the control node device 100 via the high-level communication interface IF22 of the transmission node device Tx_node3, and the received individual traffic scenario A3 is The traffic scenario management unit 211 of the transmission node device Tx_node3 inputs and manages the scenario queue (for example, a queue memory realized by a predetermined memory area of the storage unit 22 of the transmission node device Tx_node2). For example, the traffic scenario management unit 211 of the transmission node device Tx_node3 adds the received individual traffic scenario A3 to the scenario queue SCque(Tx_node3). The state of the scenario queue SCque (Tx_node3) after the individual traffic scenario A3 is added is shown in the lower right diagram of FIG. 7. In this case, since the scenario queue SCque (Tx_node3) before the addition has no data, the scenario queue SCque (Tx_node3) in FIG. 7 is in a state including only the added individual traffic scenario A3. ..

The transmission processing of the individual traffic scenarios A1 to A3 described above is sequentially executed from time t0, for example, as shown in FIG. For example, the time t0 is set to a time before the predetermined time (for example, 10 seconds) before the execution of the wireless transmission process based on the traffic scenario is started. In the present embodiment, for convenience of description, the case where the transmission processing of the individual traffic scenarios A1 to A3 is set to be executed 10 seconds before the execution of the wireless transmission processing based on the traffic scenario is started explain. Then, the time when the execution of the wireless transmission process based on the traffic scenario is first started is time t1, and t1=0 seconds. Also, t0=-10 seconds.

By performing the processing as described above, the transmission processing of the individual traffic scenarios A1 to A3 and the reception processing at each transmission node device are completed at a time before time t1 when the execution of the wireless transmission processing is started. be able to. Note that the processing time of the processing of steps S21 to S23 is less than 10 seconds.

(Steps S31 to S33):
In step S31, the control node device 100 executes a transmission timing notification process for the transmission node device Tx_node1. Specifically, the communication control unit 113 of the control node device 100 determines the timing of transmitting a transmission instruction signal (indicated as Inst_tx (Tx_node1) in FIG. 4) to the transmission node device Tx_node1 via the low-level communication interface IF11. The low level communication interface IF11 is controlled so that the transmission instruction signal is transmitted to the transmission node device Tx_node1 at the determined timing.

Note that the communication control unit 113 of the control node device 100 uses, for example, channel control on the communication paths to the three transmission node devices that are connected in parallel (individually) to the low-level communication interface IF11. It has a function of individually transmitting a transmission instruction signal (for example, a single pulse signal) via the low-level communication interface IF11. For example, the communication path connected to the transmission node device Tx_node1 is channel 1, the communication path connected to the transmission node device Tx_node2 is channel 2, and the communication path connected to the transmission node device Tx_node3 is channel 3. .. For example, when transmitting a transmission instruction signal to the transmission node device Tx_node1 via the low-level communication interface IF11, the communication control unit 113 instructs the low-level communication interface IF11 to use channel 1 and then performs a predetermined operation. At the timing of, the low level communication interface IF11 is controlled to transmit the transmission instruction signal by the channel 1 (by the communication path connected to the transmission node device Tx_node1). As a result, the transmission instruction signal can be transmitted to the transmission node device Tx_node1.

The transmission node device Tx_node1 receives the transmission instruction signal (Inst_tx(Tx_node1) in FIG. 4) transmitted from the control node device 100 as described above via the low-level communication interface IF21.

Then, when the transmission node device Tx_node1 receives the transmission instruction signal transmitted from the control node device 100, the transmission node device Tx_node1 executes a wireless data transmission process. Specifically, the traffic scenario management unit 211 of the transmission node device Tx_node1 transmits the wireless data specified by the data at the top of the list of the scenario queue SCque (Tx_node1) (the data that is input first to the queue memory). Execute the process. That is, in the case of the data shown in FIG. 7, the process of the traffic ID=0, that is, the wireless data transmission destination is the communication device St1 whose IP address is “192.168.0.1”, and the packet of the data to be transmitted. A wireless data transmission process with a size (data size) of 300 bytes is executed. The transmission node device Tx_node1 generates a radio signal including the transmission data by the data processing unit 212 and the radio communication processing unit 23 of the transmission node device Tx_node1 and generates the radio signal (in FIG. 4, referred to as D_WiFi (Dest1)). Is transmitted from the antenna Ant1 of the transmitting node device Tx_node1 to the outside (step S32).

Since the transmission node device Tx_node1 manages the previously received individual traffic scenario with the scenario queue SCque (Tx_node1), as soon as the transmission node device Tx_node1 receives the transmission instruction signal from the control node device 100, A wireless data transmission process can be executed. Furthermore, since the transmission instruction signal transmitted from the control node device 100 to the transmission node device Tx_node1 is transmitted and received by low-level communication, it is necessary to execute complicated transmission/reception processing (communication processing according to a plurality of protocol stacks). Absent. Therefore, it is possible to minimize the delay amount of the time required for transmitting and receiving the transmission instruction signal.

After executing (completion) the wireless data transmission process specified by the data at the top of the list of the scenario queue SCque (Tx_node1) (the data most recently input to the queue memory), the transmission node device Tx_node1 transmits the transmission response. The process is executed (step S33). Specifically, the data processing unit 212 of the transmission node device Tx_node1 generates data Res (TrafficID) including the traffic ID (traffic ID=0 in this case) of the completed wireless data transmission process, and sets the data to high level. The data is transmitted to the control node device 100 via the level communication interface IF22 (step S33).

Further, the transmission node device Tx_node1 updates the scenario queue SCque(Tx_node1). Specifically, the transmission node device Tx_node1 deletes the data of the traffic ID (=0) of the completed wireless data transmission process from the scenario queue SCque(Tx_node1). As a result, the data corresponding to the wireless data transmission process scheduled to be executed next by the transmission node device Tx_node1 (data of traffic ID=4 in the case of FIG. 7) becomes the head of the scenario queue SCque(Tx_node2).

The control node device 100 receives Res (TrafficID) transmitted from the transmission node device Tx_node1 via the high-level communication interface IF12, and acquires a traffic ID (=0) included in the received data (for example, data It is acquired by the processing by the processing unit 112). As a result, the control node device 100 can recognize that the wireless data transmission process corresponding to the traffic ID=0 has been executed. Since the traffic ID is a unique ID, by confirming the traffic ID, it is possible to specify which transmission node device has executed the wireless data transmission process.

(Steps S41 to S43):
In step S41, the control node device 100 executes the transmission timing notification process for the transmission node device Tx_node2. Specifically, the communication control unit 113 of the control node device 100 determines the timing of transmitting a transmission instruction signal (indicated as Inst_tx (Tx_node2) in FIG. 4) to the transmission node device Tx_node2 via the low-level communication interface IF11. The low level communication interface IF11 is controlled so that the transmission instruction signal is transmitted to the transmission node device Tx_node2 at the determined timing (the low level communication interface IF11 is controlled to transmit the transmission instruction signal by the channel 2). ).

As described above, the transmission node device Tx_node2 receives the transmission instruction signal (Inst_tx(Tx_node2) in FIG. 4) transmitted from the control node device 100 via the low-level communication interface IF21.

Then, when the transmission node device Tx_node2 receives the transmission instruction signal transmitted from the control node device 100, the transmission node device Tx_node2 executes a wireless data transmission process. Specifically, the traffic scenario management unit 211 of the transmission node device Tx_node2 transmits the wireless data specified by the data at the top of the list of the scenario queue SCque (Tx_node2) (the data input to the queue memory first). Execute the process. That is, in the case of the data shown in FIG. 7, the process of the traffic ID=3, that is, the wireless data transmission destination is the communication device St2 whose IP address is “192.168.0.2”, and the packet of the data to be transmitted. A wireless data transmission process with a size (data size) of 350 bytes is executed. The transmitting node device Tx_node2 generates a wireless signal including the transmission data by the data processing unit 212 and the wireless communication processing unit 23 of the transmitting node device Tx_node2, and the generated wireless signal (in FIG. 4, written as D_WiFi (Dest2)). Is transmitted from the antenna Ant1 of the transmitting node device Tx_node2 to the outside (step S42).

Since the transmission node device Tx_node2 manages the previously received individual traffic scenario with the scenario queue SCque (Tx_node2), as soon as the transmission node device Tx_node2 receives the transmission instruction signal from the control node device 100, A wireless data transmission process can be executed. Furthermore, since the transmission instruction signal transmitted from the control node device 100 to the transmission node device Tx_node2 is transmitted and received by low-level communication, it is necessary to execute complicated transmission/reception processing (communication processing according to a plurality of protocol stacks). Absent. Therefore, it is possible to minimize the delay amount of the time required for transmitting and receiving the transmission instruction signal.

After executing (completion) the wireless data transmission process specified by the data at the top of the list of the scenario queue SCque (Tx_node2) (the data most recently input to the queue memory), the transmission node device Tx_node2 transmits the transmission response. The process is executed (step S43). Specifically, the data processing unit 212 of the transmission node device Tx_node2 generates data Res (TrafficID) including the traffic ID (traffic ID=3 in this case) of the completed wireless data transmission process, and sets the data to high level. The data is transmitted to the control node device 100 via the level communication interface IF22 (step S43).

In addition, the transmission node device Tx_node2 performs update processing of the scenario queue SCque (Tx_node2). Specifically, the transmission node device Tx_node2 deletes the data of the traffic ID (=3) of the completed wireless data transmission process from the scenario queue SCque(Tx_node2). As a result, the data corresponding to the wireless data transmission process scheduled to be executed next by the transmission node device Tx_node2 (data of traffic ID=4 in the case of FIG. 7) becomes the top data of the scenario queue SCque(Tx_node2).

The control node device 100 receives Res (TrafficID) transmitted from the transmission node device Tx_node2 via the high-level communication interface IF12, and acquires a traffic ID (=3) included in the received data (for example, data It is acquired by the processing by the processing unit 112). As a result, the control node device 100 can recognize that the wireless data transmission process corresponding to the traffic ID=3 has been executed. Since the traffic ID is a unique ID, by confirming the traffic ID, it is possible to specify which transmission node device has executed the wireless data transmission process.

(Steps S51 to S53):
In step S51, the control node device 100 executes a transmission timing notification process for the transmission node device Tx_node3. Specifically, the communication control unit 113 of the control node device 100 determines the timing of transmitting a transmission instruction signal (indicated as Inst_tx (Tx_node3) in FIG. 4) to the transmission node device Tx_node3 via the low-level communication interface IF11. The low level communication interface IF11 is controlled so that the transmission instruction signal is transmitted to the transmission node device Tx_node3 at the determined timing (the low level communication interface IF11 is controlled to transmit the transmission instruction signal by the channel 3). ).

As described above, the transmission node device Tx_node3 receives the transmission instruction signal (Inst_tx(Tx_node3) in FIG. 4) transmitted from the control node device 100 via the low-level communication interface IF21.

When the transmission node device Tx_node3 receives the transmission instruction signal transmitted from the control node device 100, the transmission node device Tx_node3 executes the wireless data transmission process. Specifically, the traffic scenario management unit 211 of the transmission node device Tx_node3 transmits the wireless data specified by the top data in the list of the scenario queue SCque (Tx_node3) (the data that was input first to the queue memory). Execute the process. That is, in the case of the data shown in FIG. 7, the process of the traffic ID=6, that is, the wireless data transmission destination is the communication device St2 whose IP address is “192.168.0.3”, and the packet of the data to be transmitted. A wireless data transmission process with a size (data size) of 200 bytes is executed. The transmitting node device Tx_node3 generates a wireless signal including the transmission data by the data processing unit 212 and the wireless communication processing unit 23 of the transmitting node device Tx_node3, and the generated wireless signal (in FIG. 4, written as D_WiFi (Dest3)). Is transmitted from the antenna Ant1 of the transmitting node device Tx_node3 to the outside (step S52).

Since the transmission node device Tx_node3 manages the previously received individual traffic scenario with the scenario queue SCque (Tx_node3), as soon as the transmission node device Tx_node3 receives the transmission instruction signal from the control node device 100, A wireless data transmission process can be executed. Furthermore, since the transmission instruction signal transmitted from the control node device 100 to the transmission node device Tx_node3 is transmitted and received by low-level communication, it is necessary to perform complicated transmission/reception processing (communication processing according to a plurality of protocol stacks). Absent. Therefore, it is possible to minimize the delay amount of the time required for transmitting and receiving the transmission instruction signal.

After executing (completion) the wireless data transmission process specified by the data at the top of the list of the scenario queue SCque (Tx_node3) (the data most recently input to the queue memory), the transmitting node device Tx_node3 transmits the transmission response. The process is executed (step S53). Specifically, the data processing unit 212 of the transmission node device Tx_node3 generates data Res (TrafficID) including the traffic ID (in this case, traffic ID=6) of the completed wireless data transmission processing, and sets the data to high level. The data is transmitted to the control node device 100 via the level communication interface IF22 (step S53).

In addition, the transmission node device Tx_node3 performs a process of updating the scenario queue SCque(Tx_node3). Specifically, the transmission node device Tx_node3 deletes the data of the traffic ID (=6) of the completed wireless data transmission process from the scenario queue SCque(Tx_node3). As a result, the data corresponding to the wireless data transmission process scheduled to be executed next by the transmission node device Tx_node3 (data of traffic ID=7 in the case of FIG. 7) becomes the top data of the scenario queue SCque(Tx_node3).

The control node device 100 receives Res (TrafficID) transmitted from the transmission node device Tx_node3 via the high-level communication interface IF12, and acquires a traffic ID (=6) included in the received data (for example, data It is acquired by the processing by the processing unit 112). Accordingly, the control node device 100 can recognize that the wireless data transmission process corresponding to the traffic ID=6 has been executed. Since the traffic ID is a unique ID, by confirming the traffic ID, it is possible to specify which transmission node device has executed the wireless data transmission process.

Thereafter, similarly to the above, the traffic generated by the control node device 100 is transmitted from the control node device 100 to each transmission node device at a timing determined by the control node device 100. The wireless data transmission process according to the scenario can be executed at the timing determined by the control node device 100.

In the above description, as shown in the sequence diagrams of FIGS. 4 and 5, (1) the timing at which the transmission instruction signal is transmitted from the control node device 100 to the transmission node device Tx_node1, and (2) the transmission node signal from the control node device 100. It is assumed that the timing of transmitting the transmission instruction signal to the device Tx_node2 is different from the timing of (3) the timing of transmitting the transmission instruction signal from the control node device 100 to the transmission node device Tx_node3, but the timing is not limited to this. There is no.

For example, (1) timing of transmitting a transmission instruction signal from the control node device 100 to the transmission node device Tx_node1, (2) timing of transmitting a transmission instruction signal from the control node device 100 to the transmission node device Tx_node2, and (3) control The timing of transmitting the transmission instruction signal from the node device 100 to the transmission node device Tx_node3 may be performed at the same time (for example, time t1 (=0 second)). Since the low-level communication interface of the control node device 100 has a communication path (communication interface) connected in parallel to each transmitting node device, the transmission instruction signal is simultaneously transmitted to each transmitting node device in this way. can do. In this case, each transmission node device can execute the wireless data transmission process based on the individual traffic scenario substantially at the same time. That is, in the wireless traffic emulation system 1000, it is possible to appropriately control the transmission timing of each transmission node device so that the transmission timing does not shift between the plurality of transmission node devices.

(Step S6):
In step S6, the traffic scenario generation processing unit 111 of the control node device 100 generates a new traffic scenario (traffic scenario A′ shown in FIG. 8).

(Steps S71 to S73):
In steps S71 to S73, individual traffic scenario transmission processing (individual traffic scenario generation processing and transmission processing) is executed.

The traffic scenario generation processing unit 111 of the control node device 100 extracts, from the traffic scenario A′ generated in step S7, the data having the same IP address of the transmitting node device in the data of each row, so that each transmitting node device Generate individual traffic scenarios for.

FIG. 9 shows an individual traffic scenario (individual traffic scenario A1' for transmission node device Tx_node1) generated from the traffic scenario A'by this processing.

The individual traffic scenario generated by the traffic scenario generation processing unit 111 of the control node device 100 is transmitted from the control node device 100 to the corresponding transmission node device by the high level communication interface IF12 and the high level communication network Nw2 (eg Giga Ethernet). Be sent via. Specifically, the processing is executed as follows.

The individual traffic scenario A1′ for the transmission node device Tx_node1 (indicated as Tr_scenario (Ex_node1) in FIG. 5) is transmitted from the control node device 100 to the transmission node device Tx_node1 via the high level communication interface IF12 and the high level communication network Nw2. Sent. Then, the transmission node device Tx_node1 receives the individual traffic scenario A1′ for the transmission node device Tx_node1 transmitted from the control node device 100 via the high level communication interface IF22 of the transmission node device Tx_node1, and receives the received individual traffic scenario A1. 'Is input to the scenario queue (for example, a queue memory realized by a predetermined memory area of the storage unit 22 of the transmission node device Tx_node1) by the traffic scenario management unit 211 of the transmission node device Tx_node1 and managed. For example, the traffic scenario management unit 211 of the transmission node device Tx_node1 adds the received individual traffic scenario A1' after the last line of the scenario queue SCque (Tx_node1). The state of the scenario queue SCque (Tx_node1) after the individual traffic scenario A1' is added is shown in the right diagram of FIG. As shown in the diagram on the right side of FIG. 9, the data of the individual traffic scenario A1' is added after the last line (the line with the traffic ID=94) of the scenario queue SCque (Tx_node1) before the addition.

The same processing as above is executed for the transmission node device Tx_node2 and the transmission node device Tx_node3, and the data of the individual traffic scenario based on the new traffic scenario A'is added to the scenario queue.

The processing of steps S81 to S83 is the same as the processing of steps S31 to S33, and thereafter, in the wireless traffic emulation system 1000, the same processing as described above is executed.

As described above, by executing the process in the wireless traffic emulation system 1000, the state when a plurality of communication devices are newly introduced in the wireless communication system Sys1 can be simulated (emulated). be able to). That is, in the wireless traffic emulation system 1000, the traffic load based on the traffic scenario can be applied to the wireless communication system Sys1 by performing the above processing.

Then, the sensor devices S_node1 to S_node3 of the wireless quality analysis system Sys2 and the analyzer Dev_only evaluate the state of the wireless environment of the wireless communication system Sys1 to apply a predetermined traffic load by the wireless traffic emulation system 1000. In this case, the wireless communication environment can be appropriately evaluated.

As described above, in the wireless traffic emulation system 1000, the control node device 100 creates a traffic scenario that manages all the contents of traffic transmitted by a plurality of transmission node devices, and the transmission generated based on the traffic scenario is generated. According to the individual traffic for each node device, each transmission node device transmits the traffic to the communication device of the wireless communication system Sys1. That is, in the wireless traffic emulation system 1000, it is easy to introduce a plurality of transmission node devices, and the traffic scenario and the individual traffic scenario individually manage the traffic wirelessly transmitted from each transmission node device, and the traffic management of the entire system. Can be done easily. Therefore, the wireless traffic emulation system 1000 can easily emulate a wireless environment in which a large number of wireless devices are installed and a wireless environment in which a plurality of wireless devices are installed. As a result, in the wireless traffic emulation system 1000, the wireless traffic emulation system 1000 can appropriately evaluate the wireless communication environment when a predetermined traffic load is applied to the wireless communication system Sys1.

Furthermore, in the wireless traffic emulation system 1000, the control node device 100 transmits to each transmitting node device an individual traffic scenario generated based on the traffic scenario before the transmitting node device performs traffic transmission (wireless data transmission). A high level communication interface, a high level communication network, and a transmission instruction signal for instructing the traffic transmission timing are transmitted from the control node device 100 to the respective low level communication interfaces. Transmission is performed via the low level communication path, and immediately after each transmission node device receives the transmission instruction signal, traffic transmission (wireless data transmission) according to the individual traffic scenario is executed. By transmitting and receiving the transmission instruction signal via the low-level communication interface and the low-level communication path, the transmitting node device does not need to perform complicated communication protocol processing, so that the delay amount can be minimized from multiple transmitting node devices. Then, desired traffic transmission (wireless data transmission) can be performed. Therefore, in the wireless traffic emulation system 1000, even in a wireless environment in which a large number of wireless devices are installed, in order to perform an appropriate evaluation of the wireless environment, it is necessary to prevent transmission timing deviations from occurring among a plurality of transmission node devices. It is possible to appropriately control the transmission timing of the transmission node device.

Further, in the wireless traffic emulation system 1000, the control node device 100 can easily generate a traffic scenario having a desired content at a predetermined timing (or a predetermined cycle), and the individual traffic scenario generated from the traffic scenario is predetermined. Since the data can be transmitted to each transmission node device at the timing of, it is possible to easily dynamically adjust the traffic load applied to the wireless communication system Sys1.

<<First Modification>>
Next, a first modified example of the first embodiment will be described.

The same parts as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the wireless traffic emulation system of the first modified example, the traffic scenario generated by the control node device 100 is different from that of the first embodiment. The other points are the same as those in the first embodiment.

FIG. 10 is a diagram showing an example of a traffic scenario (meta-traffic scenario B) used in the first modification of the first embodiment.

In the wireless traffic emulation system of the first modified example, the traffic scenario generation processing unit 111 of the control node device 100 is not a traffic scenario that includes data included in an individual traffic scenario as it is, but a meta-traffic scenario that is a generalized traffic scenario (for example, , Meta-traffic scenario B) of FIG. Then, the traffic scenario generation processing unit 111 generates an individual traffic scenario for each transmission node device based on the meta traffic scenario (for example, the meta traffic scenario B in FIG. 10).

Specifically, as shown in FIG. 10, in the metatraffic scenario B, (1) transmission time (ms), (2) transmission node device IP address, (3) destination IP address, and (4) It is composed of the size of the transmission packet data.

The “transmission time” is a time at which the transmission node device transmits data wirelessly, and is specified in units of ms, for example.

Note that (2) the IP address of the transmission node device, (3) the destination IP address, and (4) the size of the transmission packet data are the same as in the first embodiment.

In the metatraffic scenario B, the data in each row of the metatraffic scenario B is stored and held in a state of being sorted in ascending order by the transmission time.

The traffic scenario generation processing unit 111 of the control node device 100 collects data having the same IP address of the transmitting node device in order from the first row of the meta traffic scenario B, and sequentially determines the traffic ID. The traffic scenario generation processing unit 111 determines the traffic ID while incrementing the traffic ID by +1 as shown in the right end of FIG. 10, for example.

Then, the traffic scenario generation processing unit 111 generates an individual traffic scenario in which the traffic to be transmitted within a predetermined period is collected. For example, as shown in the middle part of FIG. 10, the traffic scenario generation processing unit 111 collects the list data in which the traffic transmitted by the transmission node device Tx_node1 is collected during the period of 0≦t<60 seconds, for individual transmission node device Tx_node1. It is generated as a traffic scenario B1-1.

Further, as shown in the lower part of FIG. 10, the traffic scenario generation processing unit 111 collects the list data in which the traffic transmitted by the transmission node device Tx_node1 is collected during the period of 60≦t<120 seconds, individually for the transmission node device Tx_node1. It is generated as a traffic scenario B1-2.

The individual traffic scenarios B1-1 and B1-2 generated as described above are processed by the same process as in the first embodiment, and are transmitted from the control node device 100 to the high-level communication interface IF12 before the traffic transmission start time. , To the transmitting node device Tx_node1 via the high level communication network Nw1.

Then, the control node device 100 transmits the transmission instruction signal to the transmission node device Tx_node1 via the low-level communication interface IF11 at the timing when the time becomes 50 ms. Upon receiving the transmission instruction signal, the transmission node device Tx_node1 wirelessly transmits 1000 bytes of data to the communication device St3 (IP address: 192.168.0.3) based on the data in the row of traffic ID=0. To do. By processing in this way, the data specified in the row of traffic ID=0 is wirelessly transmitted from the transmission node device Tx_node1 at the timing of 50 ms as specified in the metatraffic scenario B. Note that the same processing is executed for other transmission node devices.

As described above, in the wireless traffic emulation system of the present modification, it is possible to generate an individual traffic scenario based on the metatraffic scenario and wirelessly transmit desired data from each transmission node device at a desired timing.

<<Second Modification>>
Next, a second modification of the first embodiment will be described.

The same parts as those in the above-described embodiment (including modified examples) are designated by the same reference numerals, and detailed description thereof will be omitted.

In the wireless traffic emulation system of the second modified example, the traffic scenario generated by the control node device 100 is different from that of the first embodiment. The other points are the same as those in the first embodiment.

FIG. 11 is a diagram showing an example of a traffic scenario (meta-traffic scenario C) used in the second modified example of the first embodiment.

In the wireless traffic emulation system of the second modified example, the traffic scenario generation processing unit 111 of the control node device 100 is not a traffic scenario that includes the data included in the individual traffic scenario as it is, but a meta-traffic scenario that is a generalized traffic scenario (for example, , Meta-traffic scenario C) of FIG. Then, the traffic scenario generation processing unit 111 generates an individual traffic scenario for each transmission node device based on the meta traffic scenario (for example, the meta traffic scenario C in FIG. 11).

Specifically, as shown in FIG. 11, in the metatraffic scenario C, (1) the IP address of the transmitting node device, (2) the transmission period (ms), (3) the destination IP address, and (4) It is composed of the size of the transmission packet data.

The “transmission cycle” is a cycle of time at which the transmission node device performs data wireless transmission, and is specified in units of ms, for example.

Note that (1) the IP address of the transmitting node device, (3) the destination IP address, and (4) the size of the transmission packet data are the same as in the first embodiment.

The traffic scenario generation processing unit 111 of the control node device 100 generates an individual traffic scenario for each transmission node device based on the meta traffic scenario C. At this time, the traffic ID is determined so that the traffic ID is unique, and the individual traffic scenario is generated.

The traffic scenario generation processing unit 111 generates an individual traffic scenario that collects traffic to be transmitted within a predetermined period. For example, as shown in the middle part of FIG. 11, the traffic scenario generation processing unit 111 generates the list data for identifying the traffic transmitted by the transmission node device Tx_node1 in the period of 0≦t<60 seconds, individually for the transmission node device Tx_node1. It is generated as a traffic scenario C1-1.

Further, as shown in the lower part of FIG. 11, the traffic scenario generation processing unit 111 generates the list data for identifying the traffic transmitted by the transmission node device Tx_node1 in the period of 60≦t<120 seconds, for the transmission node device Tx_node1 individually. It is generated as a traffic scenario C1-2.

The individual traffic scenarios C1-1 and C1-2 generated as described above are processed by the same processing as in the first embodiment, and are transmitted from the control node device 100 to the high-level communication interface IF12 before the traffic transmission start time. , To the transmitting node device Tx_node1 via the high level communication network Nw1.

Then, the control node device 100 transmits the transmission instruction signal to the transmission node device Tx_node1 via the low-level communication interface IF11 in a cycle of 100 ms. When the transmission node device Tx_node1 first receives the transmission instruction signal, the transmission node device Tx_node1 sends 1000 bytes of data to the communication device St3 (IP address: 192.168.0.3) based on the data in the row of traffic ID=0. To wirelessly send to. By processing in this way, as specified in the metatraffic scenario C, wireless transmission is performed from the transmission node device Tx_node1 in a cycle of 100 ms. Note that the same processing is executed for other transmission node devices.

As described above, in the wireless traffic emulation system of this modification, an individual traffic scenario is generated based on the meta traffic scenario, and desired data is wirelessly transmitted from each transmission node device at the timing set by the meta traffic scenario. can do.

<<Third Modification>>
Next, a third modification of the first embodiment will be described.

The same parts as those in the above-described embodiment (including modified examples) are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 12 is a schematic configuration diagram of the wireless traffic emulation system 1000, the wireless communication system Sys1, and the wireless quality analysis system Sys2 according to the third modified example of the first embodiment.

In the present modification, the analysis result data Rslt(Sys1) of the analysis device Dev_any is transmitted from the analysis device Dev_anly to the control node device 100A.

The control node device 100A differs from the control node device 100 of the first embodiment in that the analysis result data Rslt(Sys1) transmitted from the analysis device Dev_only can be input.

Then, the control node device 100A of this modification uses the same meta traffic scenario (meta traffic scenario C) as that of the second modification of the first embodiment. However, the control node device 100A of this modification is different in that (4) the size of the transmission packet data can be changed according to the analysis result data Rslt(Sys1) transmitted from the analysis device Dev_only. By doing so, for example, when the traffic volume increases in the wireless communication system Sys1, the wireless traffic emulation system can control the traffic load to be applied to the wireless communication system Sys1 to be increased accordingly. ..

That is, when the analysis result data Rslt(Sys1) transmitted from the analysis device Dev_anly is data indicating that the traffic volume is increasing in the wireless communication system Sys1, the control node device 100A of the present modification is configured to perform the meta-traffic. A meta traffic scenario C′ in which the size of the transmission packet data of scenario C is changed to larger data is generated. Then, an individual traffic scenario is generated based on the generated meta-traffic scenario C′, and the traffic transmitted from the transmitting node device is changed based on the individual traffic scenario, whereby the traffic load applied to the wireless communication system Sys1. Can be controlled to be large.

As described above, in the wireless traffic emulation system of the present modification, it is possible to dynamically generate traffic according to changes in the situation of the wireless environment.

[Other Embodiments]
In the above-described embodiment (including modifications), the case where the wireless traffic emulation system 1000, the wireless communication system Sys1, and the wireless quality analysis system Sys2 are configured as shown in FIGS. 1 and 12 has been described. The system configuration (including the number and position of each device) is not limited to these. 1 and 12 show the case where the topology of the high-level communication network Nw1 is assumed to be a bus type, but the topology of the high-level communication network Nw1 is not limited to the bus type, but a star type. It may be a mold, a ring type, or a hybrid type topology.

Further, in the above-described embodiment (including the modified example), the case where the low-level communication is unidirectional communication has been described, but the low-level communication is not limited to this, and may be bidirectional communication.

Further, in the wireless traffic emulation system described in the above embodiments (including modifications), each block (each functional unit) of each device may be individually made into one chip by a semiconductor device such as an LSI. It may be integrated into one chip so as to include all or part.

The name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.

Further, the method of circuit integration is not limited to LSI, and it may be realized by a dedicated circuit or a general-purpose processor. A programmable programmable gate array (FPGA) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.

Further, a part or all of the processing of each functional block of each of the above embodiments may be realized by a program. Then, a part or all of the processing of each functional block of each of the above-described embodiments is performed by a central processing unit (CPU) in a computer. A program for performing each processing is stored in a storage device such as a hard disk or a ROM, and is read out and executed in the ROM or the RAM.

Further, each process of the above-described embodiments may be realized by hardware, or may be realized by software (including a case where it is realized together with an OS (operating system), middleware, or a predetermined library). Further, it may be realized by mixed processing of software and hardware.

Further, for example, when each functional unit of the above-described embodiment (including the modified example) is realized by software, the hardware configuration shown in FIG. 13 (for example, CPU, ROM, RAM, input unit, output unit, etc. is a bus). Each functional unit may be realized by software processing by using a hardware configuration connected by Bus).

Further, the execution order of the processing methods in the above embodiments is not necessarily limited to the description of the above embodiments, and the execution order can be changed without departing from the gist of the invention.

A computer program that causes a computer to execute the above-described method and a computer-readable recording medium that records the program are included in the scope of the present invention. Here, examples of the computer-readable recording medium include a flexible disk, a hard disk, a CD-ROM, an MO, a DVD, a DVD-ROM, a DVD-RAM, a large capacity DVD, a next-generation DVD, and a semiconductor memory. ..

The computer program is not limited to the one recorded on the recording medium, and may be transmitted via an electric communication line, a wireless or wired communication line, a network typified by the Internet, or the like.

The specific configuration of the present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the spirit of the invention.

1000 wireless traffic emulation system 100, 100A control node device Tx_node1, Tx_node2, Tx_node3 transmission node device 111 traffic scenario generation processing unit IF11 low level communication interface (control node device)
IF12 High-level communication interface (control node device)
IF21 Low-level communication interface (transmitting node device)
IF22 High level communication interface (sending node device)
211 Traffic scenario management unit 22 Storage unit (queue memory)
23 Wireless communication processing unit

Claims (12)

A communication emulation method executed by a configuration in which a control node device and N (N: natural number) transmission node devices are added to a wireless communication system including a communication device capable of performing wireless communication,
A traffic scenario generation step in which the control node device generates a traffic scenario capable of deriving information on traffic to be transmitted by the N transmission node devices;
The control node device transmits a kth transmission node device (k: natural number, 1≦k≦N), which is the kth transmission node device included in the N transmission node devices, based on the traffic scenario. An individual traffic scenario generation step of generating an individual traffic scenario for the kth transmission node device, which is an individual traffic scenario including information on traffic to be transmitted,
An individual traffic scenario transmission step in which the control node device transmits data including the individual traffic scenario for the kth transmission node device to the kth transmission node device via a high-level communication path;
An instruction signal transmission step in which the control node device transmits, to the kth transmission node device, an instruction signal for instructing transmission of traffic for the kth transmission node device via a low-level communication path;
When the k transmission node device receives the instruction signal, the k transmission node device generates a radio signal including transmission data generated based on the individual traffic scenario for the kth transmission node device, and the generated radio signal. A wireless transmission step of transmitting a signal to a wireless communicable range of the wireless communication system;
And a communication emulation method. The control node device and the N transmission node devices are connected to each other via independent low-level communication paths,
In the instruction signal transmitting step, the control node device transmits the instruction signal to each of the N transmission node devices at an independent timing.
The communication emulation method according to claim 1. The traffic scenario is data including information on traffic to be transmitted by the N transmission node devices,
The communication emulation method according to claim 1. The individual traffic scenario is data derived by performing a predetermined calculation on the traffic scenario,
The communication emulation method according to claim 1. The individual traffic scenario is composed of one or more line data,
The row data is data corresponding to one wireless signal transmission process executed in the wireless transmission step, and includes, for each row data, a traffic ID that is an identifier that uniquely identifies the row data,
The communication emulation method according to claim 1. When the wireless transmission step is completed, the transmission node device transmits, to the control node device, data including the traffic ID corresponding to the executed wireless transmission process via the high level communication path. Further comprising a traffic ID transmission step,
The communication emulation method according to claim 5. The transmission node device includes a queue memory that manages row data of the individual traffic scenario,
When the transmission node device receives the individual traffic scenario from the control node device, the transmission node device further comprises a data queuing step of adding the row data included in the received individual traffic scenario to the queue memory.
The communication emulation method according to claim 5 or 6. When the wireless transmission step is completed, the transmission node device deletes, for the control node device, line data including the traffic ID corresponding to the executed wireless transmission process from the queue memory. Further comprising,
The communication emulation method according to claim 7. A wireless environment status acquisition step of acquiring a wireless environment status of the wireless communication system,
When it is determined that the wireless communication load in the wireless environment status acquired by the wireless environment status acquisition step is increased, the content of the traffic scenario is changed so that the traffic wirelessly transmitted from the transmission node device increases. Traffic scenario update step to update,
The communication emulation method according to claim 1, further comprising: A communication emulation system for applying a predetermined traffic load to a wireless communication system including a communication device capable of performing wireless communication,
A control node device,
And N (N: natural number) transmission node devices,
The control node device,
A traffic scenario is generated in which information on traffic to be transmitted by the N transmission node devices can be derived, and
Based on the traffic scenario, information on traffic to be transmitted by the kth transmission node device (k: natural number, 1≦k≦N), which is the kth transmission node device included in the N transmission node devices, is transmitted. A traffic scenario generation processing unit that generates an individual traffic scenario for the k-th transmission node device, which is an individual traffic scenario including:
A high-level communication interface for transmitting data including the individual traffic scenario for the k-th transmission node device to the k-th transmission node device via a high-level communication path;
A low level communication interface for transmitting an instruction signal for instructing the transmission of the traffic for the kth transmission node apparatus to the kth transmission node apparatus via a low level communication path,
Equipped with
The transmitting node device,
A high level communication interface for receiving data including the individual traffic scenario from the control node device via a high level communication path,
From the control node device, via a low level communication path, a low level communication interface for receiving an instruction signal for instructing the transmission of traffic,
A wireless transmission processing unit which, when receiving the instruction signal, generates a wireless signal including transmission data generated based on the individual traffic scenario, and transmits the generated wireless signal to a wireless communicable range of the wireless communication system. ,
A communication emulation system including. The control node device used in the communication emulation system according to claim 10. The transmission node device used in the communication emulation system according to claim 10.

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