Hub device with diagnostic function and diagnostic method using the same

1. A hub device providing a diagnostic function, comprising:

a communication unit receiving a first type of data from plural service devices to transmit the first type of data to an access point device and receiving a second type of data from the access point device to transmit the second type of data to at least one of the service devices; and

a controller controlling the communication unit and performing diagnosis for the service devices and the access point device in a different time schedule in each diagnostic section;

wherein the controller performs a first-section diagnosis to check communication state of the service devices and operation state of each of the service devices, and the controller performs second-section diagnosis to check communication state between the hub device and the access point device and operation state of the access point device after performing the first-section diagnosis;

wherein the service device is a washing machine or drying machine or clothes cleaning machine installed in a store, and the service device receives control information generated by a operation management device from the server;

the operation management device monitors or controls the plural service devices remotely via the server or the hub device;

the hub device transmits an emergency message including a diagnosis result to the operation management device when a ratio of a number of service devices in abnormal operation to a total number of installed service devices, among the service devices, exceeds a reference value; and

wherein the controller generates a message instructing a specific service device to stop operation, the specific service device being a service device that is confirmed to have an abnormality in operation state or communication state based on results of the first-section diagnosis, and the communication unit transmits the message to the specific service device.

2. The hub device according to claim 1 , wherein the communication unit communicates with the operation management device managing the service devices, the controller performs diagnosis for the service devices and the access point device in response to an instruction of the operation management device to generate diagnosis results, and the communication unit transmits the diagnosis results to the operation management device.

3. The hub device according to claim 1 , wherein the communication unit communicates with a server via the access point device, the controller performs diagnosis for the service devices and the access point device in response to an instruction of the server to generate diagnosis results, and the communication unit transmits the diagnosis results to the server.

4. The hub device according to claim 1 , wherein the controller selects a service device that has never transmitted data or a service device that has higher data traffic than other service devices among the service devices, and performs the first-section diagnosis for the selected service device.

5. The hub device according to claim 1 , wherein the controller performs a third-section diagnosis to check connection state of the hub device to an external public server and the Internet via the access point device, and the controller performs a fourth-section diagnosis to check communication state between the hub device and a server and operation state of the server via the access point device after performing the third-section diagnosis.

6. A method of performing a diagnostic function by a hub device, the hub device comprising: a communication unit directly communicating with plural service devices and an access point device; and a controller controlling the communication unit, the method comprising:

performing, by the controller, a first-section diagnosis to check communication state between the hub device and each of the service devices and operation state of each of the service devices;

performing, by the controller, a second-section diagnosis to check communication state between the hub device and the access point device and operation state of the access point device;

performing, by the controller, a third-section diagnosis to check connection state of the hub device to an external public server and the Internet via the access point device; and

performing, by the controller, a fourth-section diagnosis to check communication state between the hub device and a server and operation of the server via the access point device;

wherein the controller performs diagnosis in each diagnostic section with a different time schedule;

wherein the service device is a washing machine or drying machine or clothes cleaning machine installed in a store, and the service device receives control information generated by a operation management device from the server;

the operation management device monitors or controls the plural service devices remotely via the server or the hub device;

the hub device transmits an emergency message including a diagnosis result to the operation management device when a ratio of a number of service devices in abnormal operation to a total number of installed service devices, among the service devices, exceeds a reference value;

generating, by the controller, a message instructing a specific service device to stop operation, the specific service device being a service device that is confirmed to have an abnormality in communication state or operation state based on results of the first-section diagnosis; and

transmitting, by the communication unit, the message to the specific service device.

7. The method according to claim 6 , wherein the communication unit communicates with the operation management device managing the service devices,

the method further comprising:

generating, by the controller, diagnosis results by performing diagnosis for the service devices and the access point device in response to an instruction of the operation management device; and

transmitting, by the communication unit, the diagnosis results to the operation management device.

8. The method according to claim 6 , wherein the communication unit communicates with the server via the access point device,

the method further comprising:

generating, by the controller, diagnosis results by performing diagnosis for the service devices and the access point device in response to an instruction of the server; and

transmitting, by the communication unit, the diagnosis results to the server.

9. The method according to claim 6 , further comprising:

selecting, by the controller, a service device that has never transmitted data or a service device that has higher data traffic than other service devices among the service devices.