TWI385984B - Heterogeneous network system and coordinator gateway thereof - Google Patents

Description

Heterogeneous network system and its coordinator gateway

The present invention relates to a Heterogeneous Network system, and more particularly to a coordinator gateway for a heterogeneous network.

Heterogeneous networks usually refer to two networks in different frequency bands or different communication protocol standards. For example, the Global System for Mobile communications (GSM) and the Personal Handyphone System can be considered heterogeneous networks because both are in the core network and the wireless access network. Roads use different communication protocols. As another example, a GSM network and a wireless local area network using the IEEE 802.11n protocol can also be considered a heterogeneous network.

In addition, two network systems operating on different transmission media can also be called heterogeneous networks, such as ZigBee (a wireless communication network standard developed by the ZigBee Alliance) network and power line network, even if it is Heterogeneous network. The ZigBee network uses wireless transmission to provide data transmission services in a difficult environment with limited network setup. The power line network uses the existing power lines of most buildings and does not require re-arrangement of transmission lines. Connecting these two heterogeneous networks can provide specific benefits, such as low network deployment costs, fast network deployment, and resilient network architecture. When the two heterogeneous networks need to be connected, a gateway is needed to connect the two networks together and provide conversion of the relevant protocol and conversion of the packet format. Multiple heterogeneous networks can be coupled together when multiple gateways can provide multiple different communication protocol conversion functions.

However, at present, a heterogeneous network system including networks with different communication protocols or different transmission media needs to provide communication protocol and packet format conversion between heterogeneous networks, and more importantly, path selection when packets are transmitted. At present, there is a lack of an effective path selection mechanism, so that the packet transmission performance of the heterogeneous network system is low and the advantages of the heterogeneous network in different environments are not effectively utilized.

To solve the above problems, the present invention provides a heterogeneous network coordinator gateway for improving the packet transmission performance of the heterogeneous network.

The present invention provides a heterogeneous network system that uses a coordinator gateway to enhance the packet delivery performance of the heterogeneous network.

The present invention provides a coordinator gateway for a heterogeneous network. The coordinator gateway of the heterogeneous network includes a network monitoring device, a list of network devices, and a packet dispatch device. The network monitoring device is connected to the first network and the second network for monitoring the first traffic condition and the second traffic condition of the first network and the second network. The transmission mediums of the first network and the second network are different. In addition, the network device list stores a plurality of network device names in the first network and the second network, and generates a first path corresponding to the first network according to the first traffic condition or generates a corresponding according to the second traffic condition. The second path of the second network. Furthermore, the packet dispatching device is coupled to the network device list, receives the transport data packet, and transmits the transport data packet received by the second network to the first network according to the first path or is received by the first network according to the second path. Transmitting data packets to the second network.

The present invention provides a heterogeneous network system. The heterogeneous network system includes a plurality of networks, a plurality of gateways, and at least one heterogeneous network coordinator gateway. Among them, most networks of heterogeneous network systems have a variety of transmission media. Multiple gateways are coupled between these networks. A heterogeneous network coordinator gateway is coupled between these gateways and these networks. The heterogeneous network coordinator gateway also includes a network monitoring device, a list of network devices, and a packet dispatch device. The network monitoring device connects a first network and a second network of the network to monitor a first traffic condition and a second traffic condition of the first network and the second network. Furthermore, the network device list stores a plurality of network device names in the first network and the second network, and generates a first path corresponding to the first network according to the first traffic condition or according to the second traffic condition. A second path corresponding to the second network is generated. The packet dispatching device is coupled to the network device list, receives a transport data packet, transmits the transport data packet received by the second network to the first network according to the first path, or transmits the first network received according to the second path. Transmit the data packet to the second network.

Based on the above, the present invention provides a heterogeneous network coordinator gateway to monitor the traffic conditions in the heterogeneous network, and also selects the best path of the packet transmission according to the traffic condition and dispatches the transmission of the packet, thereby improving The performance of heterogeneous network packet transmission.

The above described features and advantages of the present invention will be more apparent from the following description.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

First, please refer to FIG. 1. FIG. 1 is a schematic diagram of a heterogeneous network system 100 according to an embodiment of the present invention. The heterogeneous network system 100 includes a first network gateway 110, a first network 112, a coordinator gateway 120, a second network 124, a router 122, a third network gateway 130, and a Three networks 132. The coordinator gateway 120 is connected to the first network 112, the second network 124, and the third network 132, and the transmission media of the three networks are different. In addition, the first network 112, the second network 124, and the third network 132 respectively include a plurality of network devices. The first network 112 is coupled to the first network gateway 110 and is coupled to the other two networks by the first network gateway 110. Similarly, the third network 132 is coupled to the third network gateway 130 and is coupled to the other two networks by the first network gateway 110. The coordinator gateway 120 is connected to the second network router 120 and the plurality of network devices 1241~124n.

In this embodiment, the transmission media of the first network 112, the second network 124, and the third network 132 are different. For example, the first network gateway 110 is connected to the coordinator gateway 120 via wire transmission and connects the first network 112 with the second network 124. The second network routers 122 are respectively connected to the first network gateway 110, the coordinator gateway 120, and the third network gateway 130 via wireless transmission. In this way, the gateways of the three heterogeneous networks are connected together to form a heterogeneous network system.

Here, a practical example is further illustrated, wherein a plurality of network devices in the first network 112 shown in FIG. 1 are connected through a power line network. The second network router 122 is coupled to the first network gateway 110, the coordinator gateway 120, and the third network gateway 130 by a ZigBee network system, and the plurality of networks within the second network 124 The road devices are also connected through the ZigBee network system. Finally, a plurality of network devices in the third network 132 are connected to each other via an Ethernet. The third network 132 is sufficient to pass through the third network gateway 130 and to connect the first and second networks 112, 124.

The three network connections shown in the above examples are only one example and are not intended to limit the present invention. The transmission medium of each network in the heterogeneous network system 100 can also be of other types, and the heterogeneous network system 100 can be extended to include more than three networks, and these networks have a plurality of different transmission media. In addition, there may be more than one gateway in a heterogeneous network system, but at least one coordinator gateway must be coupled between these gateways and these networks.

Referring to the embodiment of FIG. 1, the router 122 in the heterogeneous network system 100 mainly performs network protocol address (IP address) update, search and network packet forwarding. . The first network gateway 110 and the third network gateway 130 perform packet transmission between individual networks. This router 122 is an unnecessary component in this embodiment. When the heterogeneous network system 100 is complex and bulky, the router 122 is required to improve the performance of packet forwarding. In the present example, the first network gateway 110 and the third network gateway 130 may also be directly coupled to the coordinator gateway 120. It is worth mentioning that the coordinator gateway 120 performs the packet transmission in the second network 124, the list of network devices collected from the second network 124 itself, and the aggregation by the first network gate. The list of network devices collected by the router 110 and the third network gateway 130 is merged into a list of network devices. This list of network devices includes all network device names within the heterogeneous network system 100. In addition, the coordinator gateway 120 also detects the traffic conditions in the three networks to select the best path for the packet transmission, and dispatches the packet transmission according to the optimal path, thereby improving the packet transmission in the heterogeneous network. efficacy. In this embodiment, the technical means of the coordinator gateway and the general gateway of the heterogeneous network system 100 will be described with reference to Figs. 3 is a schematic diagram of an embodiment of a gateway 110 in accordance with an embodiment of the present invention.

Referring to FIG. 2, FIG. 2 is a schematic diagram of an embodiment of a coordinator gateway 120 in accordance with an embodiment of the present invention. The coordinator gateway 200 connects the first network 112 with the second network 124. The first network 112 is a wired network as shown in the embodiment of FIG. 1. The internal network devices (not shown) are connected by wired transmission. The second network 124 is a wireless network having a different transmission medium than the first network 112, that is, its internal network devices (not shown) are connected via wireless transmission.

Referring to FIG. 2, the coordinator gateway 120 includes a receiver buffer 202, a packet parser 204, a device list 206, a transmission buffer 208, a network monitoring device 210, a network device list 212, and a packet dispatching device 214. Receiver buffer 222, packet parser 224, device list 226, and transmit buffer 228.

As previously mentioned, the network device list 212 stores all network device names in the first network 112 and the second network 124. The network device list 212 is coupled to the device lists 206, 226. The list of devices in the first network 112 is obtained by the device list 206 collecting all device names in the first network, and the device list in the second network 124 is collected by the device list 226 for all devices in the second network 124. The name is obtained.

As a practical example, when a new network device A (not shown) is logged into the first network 112, the network device A broadcasts a login message. The packet parser 204 receives the transport packet transmitted by the network device A as described above by the sink buffer 202, and parses the transport packet to update the device list 206 of the coordinator gateway 200. The login message broadcasted by the network device A may include an identification code (ID) of the network device A, and may include a load content as a login message. After parsing the packet of the login message, the packet parser 204 notifies the device list 206, and the device list 206 adds the status value record of the network device A to the device list 206.

Conversely, when a network device B (not shown) that has logged into the first network 112 logs out of the first network 112, the network device broadcasts a logout message. At this time, the packet parser 204 receives the transport packet transmitted by the network device B described above by the receiver buffer 202, and parses the transport packet to update the first device list 206. The logout packet may include the ID of the network device B described above, and may include a load content as a logout message. After parsing the packet of the logout message, the packet parser 204 notifies the device list 206, and the device list 206 deletes the state value of the device B to be deleted from the first device list 206.

The function list 226 has the same function as the device list 206 described above, that is, the device list 226 is updated in accordance with the state of the network device login or logout in the second network 124. The list of network devices 212 in the coordinator gateway 120 aggregates the list of devices in the first network 112, the second network 124, and the third network 132 to store the names of all network devices in the heterogeneous network 100. . The present invention is not limited to the above embodiment. The network device list 212 of the coordinator gateway 200 can also actively inform the coordinator gateway 200 to update the network device after the gateway of each network is updated in the device list. The contents of the list 212 are a list of network devices that aggregate multiple networks. The content of the network device list 212 may include parameters such as the network location of each network device, the network device ID, the gateway ID of the network device, and the distance of the network device from the gateway.

Referring to the embodiment of FIG. 2, the network monitoring device 210 in the coordinator gateway 120 connects the first network 112 and the second network 124, and simultaneously monitors the first network 112 and the second network 124. traffic condition. The traffic conditions referred to herein include the congestion conditions of the first and second networks 112, 124, respectively, and the distances required to transmit the data packets.

The network monitoring device 210 can monitor traffic conditions within each network by periodically broadcasting a plurality of measurement packets to a plurality of networks. Secondly, the network monitoring device 210 can also restart monitoring the traffic conditions in each network when the network device list 212 is updated each time. In addition, the network monitoring device 210 may regenerate the transmitted distance each time the network device list 212 is updated.

When the coordinator gateway 120 is to measure the distance that the data packet needs to be transmitted, the network monitoring device 210 broadcasts a plurality of measurement packets to the first network 112 and the second network 124. The network monitoring device 210 calculates and generates the transmitted distance by using the reply packet generated by the plurality of network devices in the first network 112 and the second network 124. For example, when a single reply packet is replied from a network device, the distance transmitted is increased by one each time a gateway is passed, or the distance transmitted by each packet is increased by one, or The sum of the number of gateways and the number of routers passing through the packet is taken as the distance of transmission.

In addition, the network monitoring device 210 can also determine the network congestion condition by the continuous busy number on the transmission line connected by the first network 112 (for example, a wired network). When the number of consecutive busy times on the transmission line is greater than a preset number of times, it indicates that the traffic condition of the wired network is a congestion condition. For example, when the first preset number of times may be continuously busy 3 times in a unit time. According to the actual situation of the embodiment, the first preset number of times of the present invention is not limited to this example, and may be other values.

In addition, during the monitoring of the congestion condition of the wireless network, when the network monitoring device 210 monitors that a network device A (not shown) transmits the packet, it receives the transmission with the network device A described above. The other packet with a different packet indicates that the packet transmission of the above network device A is subject to collision. In this embodiment, the network monitoring device 210 can detect the wireless network, and when the number of consecutive collisions of the data packet occurs is greater than a preset number of times, the traffic condition of the wireless network is a congestion condition. For example, assuming that the preset number of times is set to 3, the network monitoring device 210 monitors the packet transmission status within the wireless network. When the network device A encounters a collision during the first transmission of the packet, the network device A randomly selects a number within the second power of the second and waits to try the next packet transmission. The first waiting time is two in the first power, and one number is randomly selected and multiplied by the time required to transmit a packet. Then, when the network device A described above wants to transmit the same packet for the second time and encounters a collision, the network device A randomly selects a number within the second power of the second, and the first time Wait for the next packet transfer. The second waiting time is two in the third power, randomly picking a number and multiplying the time required to transmit a packet. Similarly, when the network device A encounters a collision during the third attempt to transmit the packet, it randomly selects a number from the third power of the second, and waits again to try the next packet transmission. The third waiting time is two in the third power, randomly picking a number and multiplying the time required to transmit a packet. When the network monitoring device 210 monitors the wireless network and encounters a collision in three consecutive attempts to transmit the packet, the traffic condition of the network is regarded as a congestion condition.

Of course, the preset number of times set by 3 is only an example. The preset number of times of the present invention is not limited to this example, and may be other values.

Referring to the embodiment of FIG. 2, the traffic conditions of the first and second networks 112, 124 learned by the network monitoring device 210 can be used by the network device list 212 to generate corresponding first and second networks 112. , 124 packet transmission path. Further, the network device list 212 can generate a first path corresponding to the first network 112 according to the first traffic condition generated by the network monitoring device 210. Moreover, the network device list 212 can generate a second path corresponding to the second network 124 according to the second traffic condition generated by the network monitoring device 210. By analogy, the network device list 212 can generate a packet transmission path corresponding to the network N according to the traffic condition of the network N learned by the network monitoring device 210.

With continued reference to the embodiment of FIG. 2, the packet dispatch device 214 in the coordinator gateway 200 is coupled to the network device list 212. In addition, the packet dispatching device 214 also transmits the packet according to the packet transmission path generated by the network device list 212. As a practical example, when the packet dispatching device 214 receives a transport data packet C sent by the first network 112, and the destination of the data packet C is the second network 124, the packet dispatching device 214 The second path transmission generated by the network device list 212 transmits the transport data packet C to the second network 124. Similarly, when the packet dispatching device 214 receives a transport data packet D sent by the second network 124, and the destination of the transport data packet D is the first network 112, the packet dispatching device 214 will depend on the network device list. The second path transmission generated by 212 transmits the transport data packet C to the first network 112.

When the packet dispatching device 214 encounters the transmission of one packet and has more than two paths, the packet dispatching device 214 can also find a better path according to the network congestion condition or the signal strength status.

With continued reference to the embodiment of FIG. 2, in terms of connection relationship, the receiver buffer 202 is coupled to the first network 112 and the receiver buffer 222 is coupled to the second network 124. The packet parser 204 is coupled to the receiver buffer 202, the device list 206, and the packet dispatch device 214. The packet parser 224 is coupled to the receiver buffer 222, the device list 226, and the packet dispatch device 214. In addition, the packet dispatching device 214 is coupled to the transmit buffers 208, 228. Finally, the transmit buffer 228 is coupled to the first network 112 and the transmit buffer 208 is coupled to the second network 124.

Further, regarding the operation of the receiving side buffer 202, the packet parser 204, and the transmission buffer 208, a practical example will be described below. When the transport data packet P (not shown) is transmitted by the first network 112 to the coordinator gateway 200, the receive buffer 202 receives and stores the above-mentioned transport data packet). Next, the packet parser 204 receives the transport data packet P in the sink buffer 202. Then, the packet parser 204 re-packs the transport data packet P to generate an updated transport data packet P' based on the result of parsing the above-mentioned data packet P and the network device name inside the device list 206. The transmit buffer 208 in the coordinator gateway 200 then temporarily stores an updated transport data packet P' generated by the packet parser 204 and transmits it to the second network 124.

The device list 206 in the coordinator gateway 120 described above is used to store a plurality of network device names in the first network 112. The plurality of network device names may be an identification code of the first network 112 plus an identification code (ID) set internally by the first network 112. For example, in the device list 206, the unique identification code set internally by a network device D may be [ID: 1]. When the device list 206 updates the network device name of the first network 112 to the network device list 212, the network device D described above can be marked as [Network: 1; ID in the network device list 212. :1].

Referring to the embodiment of FIG. 2, the receiving end buffer 222, the packet parser 224, the device list 226, and the transfer buffer 228 in the coordinator gateway 120 are respectively associated with the receiving end buffer 202, The packet parser 204, the device list 206, and the transfer buffer 208 are the same. The receiving end buffer 222, the packet parser 224, the device list 226, and the transfer buffer 228 are different from the above-mentioned receiving end buffer 202, packet parser 204, device list 206, transfer buffer 208, etc. The receiving end buffer 222, the packet parser 224, the device list 226, and the transmitting buffer 228 transmit the data packet. The receiving end is the second network 124, and the transmitting end is the first network 112. Therefore, the relevant details of these components will not be described here.

3 is a schematic diagram of an embodiment of a gateway 110 in accordance with an embodiment of the present invention. The gateway 110 is connected to two networks (not shown) and is responsible for packet transmission within the first network (not shown). If the gateway 110 encounters a packet C whose destination is not within the first network, the gateway 110 forwards the packet C to the coordinator gateway 120 for forwarding.

At the same time, FIG. 3 also shows the architecture of the internal functions of the gateway 110. The gateway 110 includes a receiver buffer 302, a packet parser 304, a package packetizer 306, a device list 308, a transmit buffer 310, a receiver buffer 322, a packet parser 324, a packet wrapper 326, and a device list 328. And a transfer buffer 330. Unlike the embodiment of the coordinator gateway 120 illustrated in FIG. 2 above, the gateway is a general gateway and does not include a network monitoring device, a network device list, or a packet dispatch device. In addition, the function of the package encapsulator 306 is to convert the first network (not shown) to which it is connected, and the packet format of the packet entering the gateway 110 to another second network (not shown) to which it is connected. Packet format. Similar to package encapsulator 306 described above, package encapsulator 326 functions to convert the packet format of the packet entering the gateway 110 from the second network into the packet format of the first network.

In summary, the present invention provides a heterogeneous network gateway device that utilizes a list of devices in a heterogeneous network to update the distance of each device list and monitor congestion in each network to determine traffic conditions, according to each network. Road traffic conditions to select the best path for packet transmission and the transmission of the packet, thereby improving the performance of heterogeneous network packet transmission.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Heterogeneous network system

110, 130. . . Gateway

120. . . Coordinator gateway

122. . . router

1121~112n, 1241~124n, 1321~132n. . . Network device

202, 222, 302, 322. . . Receiver buffer

204, 224, 304, 324. . . Packet parser

206, 226, 308, 328. . . List of devices

208, 228, 310, 330. . . Transfer buffer

210. . . Network monitoring device

212. . . List of network devices

214. . . Packet dispatching device

240, 260. . . First and second networks

306, 326. . . Packet wrapper

1 is a schematic diagram of a heterogeneous network system 100 in accordance with an embodiment of the present invention.

2 is a schematic diagram of an embodiment of a coordinator gateway 120 in accordance with an embodiment of the present invention.

3 is a schematic diagram of an embodiment of a gateway 110 in accordance with an embodiment of the present invention.

120. . . Coordinator gateway

202, 222, 302, 322. . . Receiver buffer

204, 224, 304, 324. . . Packet parser

206, 226, 308, 328. . . List of devices

208, 228, 310, 330. . . Transfer buffer

210. . . Network monitoring device

212. . . List of network devices

214. . . Packet dispatching device

240, 260. . . First and second networks

Claims (20)

A heterogeneous network coordinator gateway includes: a network monitoring device connected to a first network and a second network for monitoring a first network and a first of the second network a traffic condition and a second traffic condition; a network device list storing a plurality of network device names in the first network and the second network, and generating a corresponding first network according to the first traffic condition a first path or a second path corresponding to the second network according to the second traffic condition; a packet dispatching device coupled to the list of network devices, receiving a transport data packet, and transmitting according to the first path Transmitting the transmission data received by the second network to the first network or transmitting the transmission data received by the first network to the second network according to the second path, where the first network And the transmission medium of the second network is different; a first receiving end buffer is connected to the first network, and receives and stores the transport data packet transmitted by the first network; a first device list is coupled a list of the network devices for storing the first a plurality of first network device names in the path; a first packet parser coupled to the first receiver buffer, the first device list, and the packet dispatching device for receiving the data packet and Parsing the result of the first receiving end buffer and the first network device names, repackaging the transport data packet to generate a first updated transport data packet, and a first transmit buffer coupled to the first packet Parser for temporary use And storing and transmitting the first update transmission data packet to the second network. The coordinator gateway of the heterogeneous network according to claim 1, wherein the first packet parser is received by the first packet when the new first network device logs in to the first network The end buffer receives the transport packet transmitted by the new first network device, and parses the packet to update the first device list. The coordinator gateway of the heterogeneous network according to claim 1, wherein when the one of the devices logs out of the first network, the first packet parser receives the first receiving The end buffer receives the transport packet transmitted by one of the devices and parses the transport packet to update the first device list. The coordinator gateway of the heterogeneous network according to claim 1, further comprising: a second receiving end buffer connected to the second network, receiving and storing the second network transmission Transmitting a data packet; a second device list for storing a plurality of second network device names in the second network; a second packet parser coupled to the second receiving buffer, the second device The list and the packet dispatching device are configured to receive the transport data packet, and re-encapsulate the transport data packet to generate a second update transmission according to the result of parsing the second receiver buffer and the second network device names. And a second transmission buffer coupled to the second packet parser for temporarily storing and transmitting the second update transmission data packet to the first network. The coordinator gateway of the heterogeneous network according to claim 4, wherein when a new second network device logs into the second network, the second packet parser is received by the second The end buffer receives the transport packet transmitted by the new second network device, and parses the packet to update the second device list. The coordinator gateway of the heterogeneous network of claim 4, wherein when the one of the devices logs out of the second network, the second packet parser is received by the second The end buffer receives the transport packet transmitted by one of the devices and parses the transport packet to update the second device list. The coordinator gateway of the heterogeneous network according to claim 1, wherein the first and second traffic conditions respectively comprise: a congestion condition of the first and second networks, and the transmission data packet A distance to be transmitted. The coordinator gateway of the heterogeneous network according to claim 7, wherein the network monitoring device broadcasts a plurality of measurement packets to the first network and the second network, and by using the The network device corresponds to the generated plurality of reply packets to generate the transmitted distance. A coordinator gateway for a heterogeneous network as described in claim 7 wherein the network monitoring device detects continuous busyness on a transmission line connected to the first network or the second network When the number of times is greater than a first predetermined number of times, it indicates that the first or second traffic condition is the congestion condition. For example, the coordinator gateway of the heterogeneous network described in claim 7 wherein the network monitoring device detects the occurrence of the data packet by detecting When the number of consecutive collisions is greater than a second predetermined number of times, it indicates that the first or second traffic condition is the congestion condition. A heterogeneous network system comprising: a plurality of networks having a plurality of transmission media; a plurality of gateways coupled between the networks; and at least one heterogeneous network coordinator gateway Between the gateways and the networks, including: a network monitoring device, connecting a first network and a second network of the networks to monitor the first network a first traffic condition and a second traffic condition of the second network; a network device list storing a plurality of network device names in the first network and the second network, and according to the The first traffic condition generates a first path corresponding to the first network or generates a second path corresponding to the second network according to the second traffic condition; a packet dispatching device coupled to the list of the network devices, receiving Transmitting a data packet, transmitting, according to the first path, the transport data packet received by the second network to the first network or transmitting the transport data packet received by the first network according to the second path to the a second network; a first receiver buffer connected to the first a network, receiving and storing the transport data packet transmitted by the first network; a first device list coupled to the network device list for storing a plurality of first network device names in the first network a first packet parser coupled to the first receiver buffer, the first device list, and the packet dispatching device for receiving the transport data seal And repacking the transport data packet to generate a first update transport data packet according to the result of parsing the first receive buffer and the first network device name; and a first transmit buffer coupled The first packet parser is configured to temporarily store and transmit the first update transport data packet to the second network. The heterogeneous network system of claim 11, wherein when a new first network device logs into the first network, the first packet parser receives the first receiving buffer The new first network device transmits the transport packet and parses the packet to update the first device list. The heterogeneous network system of claim 11, wherein when the one of the devices logs out of the first network, the first packet parser receives the first receiving buffer The transport packet is transmitted by one of the devices and parsing the transport packet to update the first device list. The heterogeneous network system of claim 11, further comprising: a second receiving end buffer connected to the second network, receiving and storing the transport data packet transmitted by the second network; a second device list for storing a plurality of second network device names in the second network; a second packet parser coupled to the second receiver buffer, the second device list, and the packet dispatch The device is configured to receive the data packet, and according to the result of parsing the second receiver buffer and the second network a device name, re-packaging the transport data packet to generate a second update transport data packet; and a second transfer buffer coupled to the second packet parser for temporarily storing and transmitting the second update transport data packet To the first network. The heterogeneous network system of claim 14, wherein when a new second network device logs into the second network, the second packet parser receives the second receiving buffer The transport packet transmitted by the new second network device and parsing the packet to update the second device list. The heterogeneous network system of claim 14, wherein when the one of the devices logs out of the second network, the second packet parser receives the second receiving buffer The transport packet is transmitted by one of the devices and parsing the transport packet to update the second device list. The heterogeneous network system of claim 11, wherein the first and second traffic conditions comprise: a congestion condition of the first and second networks, and a distance required for the transmission of the data packet. . The heterogeneous network system of claim 17, wherein the network monitoring device broadcasts a plurality of measurement packets to the first network and the second network, and correspondingly generated by the network devices Most of the replies to the packet to produce the distance of the transfer. The heterogeneous network system of claim 17, wherein the network monitoring device detects the first network or the second network by detecting When the number of consecutive busy times on a transmission line is greater than a first predetermined number of times, it indicates that the first or second traffic condition is the congestion condition. The heterogeneous network system of claim 17, wherein the network monitoring device indicates the first or second traffic condition by detecting that the number of consecutive collisions of the data packet is greater than a second predetermined number of times For this congestion situation.