KR100681654B1 - Wireless Home Network System Using 운 ｉｇＢｅｅ Module and Its Operation Method - Google Patents

Abstract

The plurality of devices and the home gateway according to the present invention include a ZigBee module having at least two wireless communication physical layers, and the ZigBee module in the home gateway is a message for testing network status at predetermined time intervals to the ZigBee modules of the devices. Means for determining a network state according to whether a response message corresponding to a test message is received from a ZigBee module provided in each of a plurality of devices, and a wireless communication physical layer currently used when an abnormality occurs in the network state. Means for converting the data into another wireless communication physical layer, and means for configuring a network between the devices and the home gateway with the converted wireless communication physical layer.

As described above, the present invention configures a wireless home network system using a ZigBee module having at least two wireless communication physical layers and reconfigures the home network by changing the wireless communication physical layer when the wireless home network network does not operate normally due to signal interference. As a result, a stable home network can be realized by eliminating signal interference, which is a fundamental cause of anxiety.

Description

Wireless home network system using 모듈 ｉｇＢｅｅ module and its operation method {A WIRELESS HOME NETWORK SYSTEM USING A ZigBee MODULE AND METHOD FOR OPERATING THE SAME}

1 is a block diagram showing a wireless home network system using a ZigBee according to the present invention,

2 is a diagram illustrating a ZigBee stack structure used in a wireless home network system according to the present invention.

3 is a flowchart illustrating an operation process of a wireless home network system according to an embodiment of the present invention.

4 is a flowchart illustrating an operation process of a wireless home network system according to another embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

100: home gateway

102: ZigBee module for home gateway

110/1, 110/2, 110/3, 110/4: 1st, 2nd, 3rd, 4th device

112: ZigBee module for devices

The present invention relates to a home network system, and more particularly, to a wireless home network system using ZigBee and a method of operating the same.

Nowadays, home appliances in the home are connected to one network, that is, home network, which includes network devices such as home appliances, network printers, and internet gates by incorporating Internet standard technologies such as TCP / IP, HTTP, and XML. Universal Plug and Play (UPnP) has been proposed as a technology to enable home networking.

Currently, the UPnP AV device 1.0 specification includes a control point (CP), a media server, and a media renderer.

Currently, a product constituting a control point in a home network in a home mainly includes a device having a user interface such as a desktop PC, a notebook PC, a TV, and at least one device may be provided in the home.

These control points are responsible for coordinating and managing the behavior of the media server and media renderer according to user instructions.

In addition, the UPnP device architect 1.0 includes a plurality of devices providing a service and a control point (CP) for controlling the plurality of devices.

The control point (CP) is a software entity that controls a variety of equipment, and is configured to discover, discover, and control various devices according to a user's key input.

A device is a device such as a PC or a network device connected to a home network. The device notifies an event to a control point (CP) and provides a presentation page as a control point. .

In the home network system, the device control and the state grasp use the frequency set in the communication physical layer. In this case, the frequency band set in the communication physical layer is fixed to one.

As a communication physical layer for configuring a home network system, home network devices transmit and receive signals such as mutual control and monitoring using a current power line (PLC), and when a communication error occurs, the home network devices are connected to the physical layer according to the method defined in the home network protocol. Either the retransmission of the signal to the set frequency band is required as the number of rounds or the application checks the communication error and executes the error correction process.

If the communication physical layer is a wireless rather than a power line, similarly to a home network configuration using the power line, when a communication error occurs, a request for retransmission of a signal or an application terminal executes a process of correcting the communication error.

However, since the frequency bands of the communication physical layer are fixed to one, if there is continuous signal interference in the communication frequency band in use, devices on the home network cannot communicate and network devices again after the signal interference disappears. There is a problem that must go through network binding process.

An object of the present invention is to solve the problems of the prior art, when a wireless home network system is configured using a ZigBee module having at least two wireless communication physical layers and the wireless home network network does not operate normally due to signal interference. The present invention provides a wireless home network system using ZigBee and a method of operating the same, by reconfiguring a home network by changing a wireless communication physical layer, and implementing a stable home network by removing signal interference, which is a fundamental cause of anxiety.

In order to achieve the above object, the present invention provides a home network system including a home gateway wirelessly connected to a plurality of devices, wherein the plurality of devices and the home gateway have a ZigBee module having at least two wireless communication physical layers. The ZigBee module in the home gateway includes: means for transmitting a network status test message to ZigBee modules of the devices at predetermined time intervals, and for the test from the ZigBee module respectively provided in the plurality of devices. Means for determining a network state according to whether a response message corresponding to the message is received; means for converting a currently used wireless communication physical layer to another wireless communication physical layer when an abnormality occurs in the network state, and the converted wireless communication physical layer. Devices and Home Gateways Between the means for configuring the network.

The present invention also provides a home network system including a home gateway wirelessly connected to a plurality of devices, wherein the plurality of devices and the home gateway include a ZigBee module having at least two wireless communication physical layers. The ZigBee module provided with each of the devices includes means for transmitting a message to a ZigBee module of the home gateway via a wireless communication physical layer currently used at a predetermined time interval, wherein the ZigBee module of the home gateway includes: Means for determining a network state according to whether a message is received from a ZigBee module provided in devices, and determining that the message is in a network state when a message is not received from at least one of ZigBee modules provided in the devices. The wireless communication physical layer currently used And means for converting the physical layer and the wireless communication, comprising: means for configuring the network between the device and the home gateway to the converted wireless communication physical layer.

The present invention provides a method of operating a home network system comprising a home gateway and a plurality of devices including a ZigBee module having at least two wireless communication physical layers, wherein the ZigBee module of the home gateway is configured to test a network state at a predetermined time interval. Transmitting a message to a ZigBee module provided in each of the plurality of devices, determining whether a response message corresponding to the test message is received from the ZigBee module provided in the plurality of devices, and As a result of the determination, when a response message is not received from at least one of the ZigBee modules provided in the plurality of devices, converting a currently used wireless communication physical layer into another wireless communication physical layer, and converting the converted wireless communication physical layer. Devices and home gateway In a step of configuring the network.

In addition, the present invention is a method of operating a home network system comprising a home gateway and a plurality of devices having a ZigBee module having at least two wireless communication physical layer, currently used at predetermined time intervals from the ZigBee modules of the devices Determining whether a message is received through the wireless communication physical layer, and if the message is not received from at least one of the ZigBee modules of the devices, converting the currently used wireless communication physical layer to another wireless communication physical layer. And configuring a network between devices and a home gateway with the converted wireless communication physical layer.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a wireless home network system using a ZigBee according to the present invention, Figure 2 is a diagram showing a ZigBee stack structure used in the wireless home network system of the present invention.

Prior to the description of the present invention, the basic protocol of ZigBee follows the standard defined in IEEE802.15.4, adopts CSMA / CA scheme for channel assignment as in other IEEE802 based wireless networks, and in 2.4GHz and 5GHz WLAN. Use the DSSS method you use. Because the physical layer is wireless, there is a vulnerability that interferes with several other wireless signals. ZigBee transmits and receives data using three bandwidths of 2.4 GHz, 868 MHz, and 915 MHz. In the present invention, ZigBee uses three bands of 2.4 GHz, 868 MHz, and 916 MHz in order to prevent transmission and reception errors due to signal interference. Adopt a ZigBee module that can be used depending on the signal strength and error occurrence.

Referring to FIG. 1, a wireless home network system according to the present invention includes first, second, third, and fourth home gateways 100 equipped with a ZigBee module 102 for a home gateway, and a ZigBee module 112 for a device. Device 110/1, 110/2, 110/3, 110/4.

The ZigBee modules 102 and 112 mounted on the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 and the home gateway 100 may have one wireless communication physical layer. Instead, it adopts three bands: 2.4GHz, 868MHz, and 915MHz. That is, as shown in FIG. 2, the ZigBee modules 102 and 112 mounted in the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 and the home gateway 100 are shown. The stack structure of is composed of "Application layer", "Network layer", "Data link layer", "Mac layer" and "Physical layer" consisting of three bands of 2.4GHz, 868MHz, 925MHz.

In this case, the ZigBee module 102 for the home gateway mounted in the home gateway 100 may include a ZigBee module of the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4. Means for transmitting a network status test message at predetermined time intervals to the 112 and the first, second, third and fourth devices 110/1, 110/2, 110/3 and 110/4, respectively. Means for determining a network state according to whether a response message corresponding to a test message is received from the ZigBee module 112, means for converting a currently used wireless communication physical layer to another wireless communication physical layer when an abnormality occurs in the network state; The converted wireless communication physical layer includes a means for configuring a network between the devices and the home gateway.

An operation process of the wireless home network system having the above configuration will be described with reference to FIG. 3. 3 is a flowchart illustrating an operation of a wireless home network system using a ZigBee module according to an embodiment of the present invention.

As shown in FIG. 3, after the wireless home network system is driven (S300), the home gateway ZigBee module 102 mounted in the home gateway 100 determines whether it is time to check network status (S302). ).

If it is determined in step S302 that the network status check is not necessary, the wireless home network system proceeds to step S300 and continues to operate, otherwise the ZigBee module 102 for the home gateway sends a test message to the first, second, and third. First, second, third, and fourth devices 110/1, 110/2, and 4 after being transmitted to the ZigBee module 112 mounted on the four devices 110/1, 110/2, 110/3, and 110/4. It is determined whether a response message is received from the ZigBee modules 112 of 110/3 and 110/4 (S304 and S306).

As a result of the determination in step S306, a response message may not be received from at least one of the ZigBee modules 112 of the first, second, third, and fourth devices 110/1, 110/2, 110/3, 110/4. In this case, the ZigBee module 102 for the home gateway reconfigures the home network based on the wireless communication physical layer currently used, that is, the frequency band, and then changes the frequency bands (S310 and S312). That is, the wireless communication physical layer of the ZigBee module 102 for the home gateway is changed and the ZigBee module 112 of the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4. After the wireless communication physical layer used by the user is changed, the home gateway 100 and the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 are changed through the changed wireless communication physical layer. Home networking such as control and monitoring is performed.

As a result of the determination in step S306, when all response messages are received from the ZigBee modules 112 of the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4, the home gateway is used. The ZigBee module 102 maintains the wireless communication physical layer currently being used for home networking (S308).

In the present invention, the ZigBee module 102 for the home gateway transmits a test message to the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 at preset time intervals. For example, the wireless communication physical layer is changed based on the response message. However, as another example, the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 are described. ) ZigBee modules 112 may transmit a message to the ZigBee module 102 for the home gateway at predetermined time intervals.

That is, the ZigBee module 112 provided with each of the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 may select a wireless communication physical layer currently used at preset time intervals. Means for transmitting a message to the ZigBee module 102 for the home gateway via. In this case, a message transmitted from the ZigBee module 112 provided with the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 to the home gateway ZigBee module 102, Message indicating whether the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 are active.

In addition, the ZigBee module 102 for the home gateway receives messages from the ZigBee module 112 provided in the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4, respectively. Means for determining network status, and whether there is a message from at least one of the ZigBee modules 112 of the first, second, third, and fourth devices 110/1, 110/2, 110/3, 110/4. Means for converting the currently used wireless communication physical layer to another wireless communication physical layer when it is not received, and means for configuring a network between the devices and the home gateway with the converted wireless communication physical layer.

An operation process of the wireless home network system having the above configuration will be described with reference to FIG. 4. 4 is a flowchart illustrating an operation process of a wireless home network system according to another embodiment of the present invention.

As shown in FIG. 4, after the wireless home network system is driven (S400), the ZigBee module 102 for home gateway mounted on the home gateway 100 determines whether it is time to check network status (S402). ).

If it is determined in step S402 that the network status check is not necessary, the wireless home network system proceeds to step S400 and continues to operate, otherwise the ZigBee module 102 for the home gateway is connected to the first, second, third and fourth devices. It is determined whether a message is received from the ZigBee modules 112 mounted on the 110/1, 110/2, 110/3, and 110/4 (S404).

As a result of the determination in step S404, when a message is not received from at least one of the ZigBee modules 112 of the first, second, third, and fourth devices 110/1, 110/2, 110/3, 110/4. The ZigBee module 102 for the home gateway reconfigures the home network based on the wireless communication physical layer currently used, that is, the frequency band, and then changes it (S408 and S410). That is, the wireless communication physical layer of the ZigBee module 102 for the home gateway is changed and the ZigBee module 112 of the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4. Control between the home gateway 100 and the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4 through the changed wireless communication physical layer after the wireless communication physical layer used by the user is changed. And home networking such as monitoring.

As a result of the determination in step S404, when all response messages are received from the ZigBee modules 112 of the first, second, third, and fourth devices 110/1, 110/2, 110/3, and 110/4, the home gateway is used. The ZigBee module 102 maintains the wireless communication physical layer currently being used for home networking (S406).

According to the present invention, by configuring a wireless home network system using a ZigBee module having at least two wireless communication physical layers, when the home network network does not operate normally due to signal interference, a stable wireless home network network can be realized by changing the wireless communication physical layer. Can be.

As described above, the present invention configures a wireless home network system using a ZigBee module having at least two wireless communication physical layers, and reconfigures the home network by changing the wireless communication physical layer when the wireless home network network does not operate normally due to signal interference. By doing so, it is possible to implement a stable home network by eliminating signal interference, which is a fundamental cause of instability of the home network.

As mentioned above, although this invention was concretely demonstrated based on the Example, this invention is not limited to this Example, Of course, various changes are possible within the range which does not deviate from the summary.

Claims (7)

A home network system comprising a home gateway wirelessly connected to a plurality of devices, In the plurality of devices and the home gateway, A ZigBee module having at least two wireless communication physical layers, The ZigBee module in the home gateway, Means for transmitting a network status test message to ZigBee modules of the devices at predetermined time intervals; Means for determining a network state according to whether a response message corresponding to the test message is received from a ZigBee module provided in each of the plurality of devices; Means for converting a currently used wireless communication physical layer into another wireless communication physical layer when an abnormality occurs in the network state; Means for configuring a network between devices and a home gateway with the converted wireless communication physical layer Wireless home network system using a ZigBee comprising a. A home network system comprising a home gateway wirelessly connected to a plurality of devices, In the plurality of devices and the home gateway, A ZigBee module having at least two wireless communication physical layers, The ZigBee module provided with each of the plurality of devices, Means for transmitting a message to a ZigBee module of the home gateway via a wireless communication physical layer currently used at a predetermined time interval; The ZigBee module of the home gateway, Means for identifying a network state according to whether a message is received from a ZigBee module provided in each of the plurality of devices; Means for converting a currently used wireless communication physical layer into another wireless communication physical layer by determining that the network state is abnormal when a message is not received from at least one of the ZigBee modules provided in the devices; Means for configuring a network between devices and a home gateway with the converted wireless communication physical layer Wireless home network system using a ZigBee comprising a. The method according to claim 1 or 2, The wireless communication physical layer used in the ZigBee module is 868MHz, 915MHz, 2.4GHz wireless home network system using a ZigBee. The method of claim 2, The wireless home network system using ZigBee, the message transmitted from the ZigBee module provided with each of the plurality of devices to the ZigBee module of the home gateway, the message indicating whether the device is active. A method of operating a home network system comprising a home gateway and a plurality of devices including a ZigBee module having at least two wireless communication physical layers, Transmitting, by a ZigBee module of the home gateway, a network state test message to a ZigBee module provided in each of the plurality of devices at predetermined time intervals; Determining whether a response message corresponding to the test message is received from a ZigBee module provided in each of the plurality of devices; As a result of the determination, converting a currently used wireless communication physical layer into another wireless communication physical layer when a response message is not received from at least one of ZigBee modules provided in the plurality of devices; Configuring a network between devices and a home gateway with the converted wireless communication physical layer Operation method of a wireless home network system using a ZigBee. A method of operating a home network system comprising a home gateway and a plurality of devices including a ZigBee module having at least two wireless communication physical layers, Determining whether a message is received from the ZigBee modules of the devices through a wireless communication physical layer currently used at a predetermined time interval; Converting a currently used wireless communication physical layer into another wireless communication physical layer when a message is not received from at least one of the ZigBee modules of the devices as a result of the determination; Configuring a network between devices and a home gateway with the converted wireless communication physical layer Operation method of a wireless home network system using a ZigBee. The method according to claim 5 or 6, The wireless communication physical layer used in the ZigBee module is 868MHz, 915MHz, 2.4GHz operating method of a wireless home network system using ZigBee.

Images