JPH07297852A - Network equipment - Google Patents

Abstract

PURPOSE:To easily recognize equipment addresses and connection relations of plural terminals on a network by extracting the address or a terminal from data transmitted to the network at the time of power-on of the terminal. CONSTITUTION:A packet (data) on the network is received by transceiver parts 1 to 3 and is decoded by encoding/decoding parts 4 to 7 and is successively stored in memories 12 to 15. When stored packet data is data received by broadcast communication, a CPU 18 successively stores the source ID in the memory in a memory 16 for source no storage. At the time of checking the connection state, the source ID stored in the memory 16 for source ID storage is changed to the destination ID to generate a dummy file, and it is transmitted as a packet to the network, and the source address of a response packet from the network is compared with the source ID for broadcast communication. Thus, the connection state of each terminal is easily recognized without stopping the application.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network device using a wireless LAN.

[0002]

2. Description of the Related Art A conventional network device will be described below. FIG. 8 is a block diagram of a conventional network device. In FIG. 8, a to k indicate terminals capable of network communication. Networks A and B are wired LAN systems, and networks C and D are wireless LAN systems. Also, terminals a to c, d to e,
f to h and i to k communicate with each other in each network.

Conventionally, in a wired LAN system, in order to grasp the network connection form, the running application is stopped, the OS mode is entered, all terminals are accessed, and the response is confirmed, or , The physical way to physically investigate the connected transmission path (cable). In wireless LAN, O
I was in S mode and was investigating as described above.

[0004]

However, in the conventional network device, as described above, when a network failure or a failure occurs in the wireless LAN system, it is impossible to physically investigate the connection relationship of the transmission paths. However, there is a problem that there is no choice but to stop the running application, which causes a time loss.

Therefore, an object of the present invention is to provide a network device in which the device addresses and connection relationships of a plurality of terminals on the network can be easily grasped and the time loss can be greatly improved.

[0006]

The present invention provides a wireless LAN,
Means for encoding / decoding electric signals flowing on the transmission paths of a plurality of networks in which wired LANs coexist, storage means for storing encoded information, and on a network connected from encoded information. It is provided with means for extracting device addresses of a plurality of terminals, means for discriminating the connection relation of each terminal, and display means for displaying the connection relation.

[0007]

With the above-mentioned configuration, by extracting the device address of each terminal from the data transmitted to the network when each terminal is powered on, the connection state of each terminal can be displayed on the display device or the like without stopping the application. It was done like this.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. 1 is a block diagram of a network device in one embodiment of the present invention, FIG. 2 is a flow chart of the network device in one embodiment of the present invention, FIG. 3 is a configuration diagram of packet data in one embodiment of the present invention, and FIG. FIG. 6 is a configuration diagram in the source ID memory in one embodiment of the present invention, and FIG. 7 is a display example diagram of a connection form in one embodiment of the present invention.

In FIG. 1, 1 to 15 are conventional network interface circuits, 1 to 3 are transceiver units for transmitting and receiving electric signals on the network, and 4 to 7 are data conversion between signals on the network and signals on the host side. An encoding / decoding unit that performs level conversion, 8 to 11 are LAN controllers that control the data link layer, 12 to 15 are memories for temporarily storing transmission / reception data, 16 is a memory for storing a source ID, and 17 is a memory. Reference numeral 19 is a display memory and 20 is a display device. .

Next, the processing procedure will be described with reference to the flowchart of FIG. First, in step F1, the packet (data) on the network is received by the transceiver units 1 to 3 and Manchester-decoded by the encoding / decoding units 4 to 7. The data are sequentially stored in the memories 12 to 15 by the LAN controllers 8 to 11.

Then, in step F2, it is determined whether or not the packet data stored now is broadcast communication. Here, the packet data will be described with reference to FIG. Packet data on the network is roughly divided into six parts. The preamble part is a part for synchronizing data. The packet start delimiter section indicates the beginning of a valid packet. The destination ID part shows the unique ID (address) of the terminal of the packet destination.
The source (source) ID section indicates the unique ID (address) of the terminal of the source of the packet. The length part indicates the data length. The data part shows the part of the content that is actually being sent. The packet inspection sequence part shows a part for detecting an error in the input packet.

[0012] Here, whether the broadcast communication is
It is determined by whether or not all the bits of the destination ID (address) in the packet are "1". Here, if the stored packet data is based on broadcast communication, the CPU 18 sets the source ID (source address) in the packet of the memory 13 to the LAN controller 8 to
11 to control and extract the source ID store memory 16
Are sequentially stored (step F4). If not by broadcast communication, the packet is discarded (step F3).

Next, in step F5, the analysis of the connection form will be described with reference to FIG. 4 showing the configuration of the source ID store memory 16. Source ID store memory 1
6 is divided into blocks (A to D) for each network, and is sequentially stored at each broadcast communication. Since the broadcast communication is output every time the power of various terminals is turned on, the source IDi, k, j is stored in the block of the network D and then stored again as j, i. At this time, the CPU 18 has duplicated I
D is processed so as not to be stored.

Here, in the case of checking the connection state at an arbitrary (current) time, the following processing is performed. The CPU 18 changes the source IDs a to k stored in the source ID storing memory 16 of FIG. 5 into destination IDs, creates dummy files, and transmits packets to the network (steps F6 and F7). When the packet data is sent to the terminal of each network, it sends a response packet this time. The response packet from each network is received by this device (step F8).

When received, the source address is stored in the source ID storing memory 16 (FIG. 6, step F9). The source ID at this time is stored in an area different from the storage destination of the source ID during broadcast communication.

When displaying, the following processing is performed. The connection form of the source ID by broadcast communication (FIG. 5) and the connection form by the source ID of the response waiting (FIG. 6) are displayed on the display device 20 through the display memory 19 (FIG. 7, steps F10 and F11). The connection form by source ID extraction at the time of broadcast communication in FIG. 7 shows the state of the device that has been connected in the past, and the source ID extraction by the response packet shows the current network connection state.

According to the example shown in FIG. 7, the c-terminal of the network A and the e-terminal of the network B are for some reason (eg, power-off of the terminal, malfunction such as disconnection of connection cable, malfunction of terminal, etc.). You can see that it is not connected.

[0018]

According to the present invention, means for encoding / decoding electric signals flowing on transmission paths of a plurality of networks in which wireless LANs and wired LANs coexist, and storage means for storing encoded information, Since a device for extracting the device addresses of a plurality of terminals on the connected network from the encoded information, a device for determining the connection relationship of each terminal, and a display device for displaying the connection relationship are provided, a wireless LAN It is possible to easily grasp the connection status of each terminal without stopping the application in multiple different network systems, including, so the maintenance and management of the network is greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a network device according to an embodiment of the present invention.

FIG. 2 is a flowchart of a network device according to an embodiment of the present invention.

FIG. 3 is a configuration diagram of packet data according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a source ID memory in an embodiment of the present invention.

FIG. 5 is a configuration diagram of a source ID memory in an embodiment of the present invention.

FIG. 6 is a configuration diagram of a source ID memory in an embodiment of the present invention.

FIG. 7 is a display example diagram of a connection form according to an embodiment of the present invention.

FIG. 8 is a configuration diagram of a conventional network device.

[Explanation of symbols]

 1, 2, 3 Transceiver unit 4, 5, 6, 7 Encoding / decoding unit 8, 9, 10, 11 LAN controller 12, 13, 14, 15 Packet transmission / reception memory 16 Source ID store memory 17 Main memory 18 CPU 19 display memory 20 display device

Claims (1)

[Claims] 1. An electric signal flowing on a transmission path of a plurality of networks in which a wireless LAN and a wired LAN are mixed is encoded.
Decoding means, storage means for storing encoded information, means for extracting device addresses of a plurality of terminals on the network connected from the encoded information, and connection relation of each terminal are determined. A network device comprising means and display means for displaying a connection relationship.