JP2007336604A - System and method for controlling network equipment, network equipment setting control apparatus, and network equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network equipment control system capable of achieving plug and play to a plurality of network interfaces. <P>SOLUTION: A network equipment setting control apparatus is provided on a network, where each of the network equipment has an inherent address informing means for informing the network equipment setting control apparatus of the inherent address of the network equipment. The network equipment setting control apparatus comprises a search means for searching whether there is channel setting information to the inherent address in an address correspondence table, and an automatic configuration setting means for transferring configuration setting information required for setting a channel to the network equipment to the network equipment when the inherent address is not found in the address correspondence table. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a network device management system and method, and more particularly to a network device management system and method for realizing a plug and play function of a network device.

  The present invention also relates to a network control device and a network device used in such a network device management system.

  When a device is connected, a PC (personal computer) automatically detects the presence of the device and loads the necessary software so that it can be used. So-called plug and play (plug (code insertion)) It can be used (means usable)).

  For example, plug and play of a network device such as a PC is an ARP (ARP: Address Resolution Protocol) protocol in the router Ethernet (Ethernet (registered trademark)) for searching / checking a host on the same network. And is applied only to Ethernet (registered trademark) as seen in the function (which is a protocol for converting IP address to MAC address).

In addition, when a desired connection device is connected to the network through an adapter, various appropriate setting values that should be set for the connection device to operate normally on the network are acquired from the server and automatically set. There is also a technique that can reduce the individual setting burden on the adapter by the user (see, for example, Patent Document 1).
JP 2000-259538 A

  The plug-and-play function described above is applied only to Ethernet (registered trademark), for example, there is a problem that it cannot be applied when used in combination with a transmission method other than Ethernet (registered trademark) such as ATM.

  Also, transmission loss between routers and network devices is not taken into account by routers. Therefore, it cannot be said that the power value transmitted from the router is necessarily optimized.

  Furthermore, the target network device is limited to a terminal such as a PC, and does not support devices such as a base station used in mobile communication or an access point used in a wireless LAN.

  The present invention has been made in view of the above-described problems, and a problem to be solved is a network capable of realizing plug and play for a plurality of network interfaces and reducing the management cost of network devices. An apparatus management system and method thereof are provided.

  Another object of the present invention is to provide a network device setting control device and a network device used in such a network device management system.

  In order to solve the above-described problem, the present invention provides a network device management system for setting a condition necessary for starting communication of a network device connected to a network. A network device setting control device having line setting means for setting a line for the device, wherein the network device includes a unique address notification means for notifying the network device setting control device of an address unique to the network device; The line setting means of the setting control device searches for an address correspondence table storing line setting information corresponding to an address unique to the network device and whether the unique address notified from the network device is in the address correspondence table. Search means to As a result of the search, there is provided an auto configuration setting means for transferring configuration setting information necessary for line setting with the network device to the network device when the unique address is not in the address correspondence table. It is characterized by that.

  Further, according to claim 2 of the present invention, in the network device management system, the address correspondence table holds topology information indicating a connection state of the network device to the network, and the auto configuration setting unit includes Line setting address generation means for determining a line setting address based on the topology information, and a first line for notifying the determined line setting address to the network device newly connected to the network as the configuration setting information And a setting address notification means.

  According to a third aspect of the present invention, in the network device management system, the address correspondence table holds topology information indicating a connection state of the network device to the network and can be assigned based on the topology information. Line setting address storage means for obtaining and storing a new line setting address, and the autoconfiguration setting means determines a line setting address that can be assigned by the line setting address storage means, and the determined line setting address is stored in the configuration. And a second line setting address notification means for notifying a network device newly connected to the network as the operation setting information.

  According to a fourth aspect of the present invention, in the network device management system, the autoconfiguration setting unit is configured to notify the network device before newly notifying the network device newly connected to the network of the line setting address. It is characterized by comprising an authentication means for performing the authentication.

According to a fifth aspect of the present invention, in the network device management system, the network device notifies the network device setting control device of connection information indicating a connection / disconnection state with the network. With
The network device setting control device, when receiving information indicating a connection state from the network device, a unique address notification requesting unit for requesting a notification of a unique address to the network device, and a disconnected state from the network device And data deletion means for deleting the line setting information corresponding to the network device from the address correspondence table when the information indicating the network device is received.

  According to a sixth aspect of the present invention, in the network device management system, the network device setting control device is newly connected by the first line setting address notifying unit or the second line setting address notifying unit. And a test signal transmitting means for transmitting a test signal to the network device after notifying a line setting address to the network device, wherein the network device measures the received signal level of the test signal and controls the network device setting. A first reception level measurement / notification means for notifying a device, wherein the network device setting control device determines a transmission loss of a transmission path from the network device setting control device to the network device based on the received signal level. A transmission loss estimation means for estimating, and the network in consideration of the transmission loss. It is characterized in that a first transmission power setting means for setting the transmission power of the click device.

  According to claim 7 of the present invention, in the network device management system, the network device setting control device sends a test signal to a newly connected network device from another network device already connected to the network. A test signal transmission instruction means for transmitting, and the network device comprises a second reception level measurement / notification means for measuring a received signal level of the test signal and notifying the network device setting control device, A setting control device configured to estimate interference power from the other network device based on the received signal level; and second power to set transmission power of the network device in consideration of the interference power Transmission power setting means, the network in consideration of the transmission loss and the interference power It is characterized by further comprising a third transmission power setting means for setting the transmission power of the vessel.

  According to the present invention, if the unique address notified from the network device connected to the network is not in the address correspondence table held in advance, the network device setting control device determines that the network device is a newly installed NE. To do. Then, a new line setting address is automatically generated and notified to the network device. As a result, the line setting of the new network device can be automatically completed without performing the line setting work that has been performed manually. That is, plug-and-play with respect to the newly installed network device becomes possible, and the management cost of the network device can be greatly reduced.

  According to the present invention, if the unique address notified from the NE connected to the network is not in the address correspondence table held in advance, the automatic setting / deleting apparatus determines the NE as a newly-installed NE. Then, a new line setting address is automatically generated and notified to the NE. Thereby, the line setting of the new NE can be automatically completed without performing the line setting work that has been performed manually. That is, plug-and-play for a newly-installed NE becomes possible, and the management cost of network devices can be greatly reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

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

  In FIG. 1, this network device management system includes wireless systems A100 to C300 including network devices (eg, base stations, access points, etc.) that perform wireless communication with user terminals (eg, mobile terminals, hereinafter abbreviated as terminals). And an automatic setting / deleting device 10 that manages the connection status of the network device (hereinafter abbreviated as NE (Network Equipment)).

  The automatic setting / deleting device 10 is provided with an address correspondence table 15 for storing line setting information for each NE. The wireless systems A100, B200, and C300 are wireless systems having different wireless transmission schemes. For example, a wireless system that employs a WCDMA (Wideband Code Division Multiple Access) scheme compliant with the IMT-2000 standard is used as the wireless system A100. The wireless system B200 is a wireless system that employs an HSDPA (High Speed Downlink Packet Access) system, which is an extended version of the WCDMA system, and the wireless system C300 is a wireless system that employs a wireless LAN system compliant with the IEEE 802.11 standard. This is defined in this example.

  As described above, the wireless systems A to C are different wireless systems. Terminals belonging to different wireless systems cannot communicate with each other unless they normally go through a router. In this example, it is assumed that the automatic setting / deleting device 10 is built in the router, and that the route setting for inter-terminal communication across the wireless system is also performed by this router.

  The wireless system A100 includes NEs 101 to 103, the wireless system B200 includes NEs 201 to 203, and the wireless system C300 includes NEs 301 to 302. Note that the NE 303 of the wireless system C300 is a new NE newly connected to the network (dotted line portion).

  Each wireless system A100 to C300 is given a subnet mask ([255.255.255.0] to [255.255.255.3]) for finding out which wireless system A100 to C300 the terminal belongs to. .

  The automatic setting / deleting device is configured as shown in FIG. 2, for example. FIG. 2 is a functional configuration diagram of the automatic setting / deleting apparatus 10.

  In FIG. 1, the automatic setting / deleting apparatus 10 includes a line interface (I / F) function 11 for NE, a network interface (I / F) function 12 for network side, and an address correspondence table 15.

  Next, the NE will be described. In the following, a new NE 303 accommodated in the radio system C300 will be described as an example.

  The NE 303 is configured as shown in FIG. 3, for example. FIG. 3 is a functional configuration diagram of the NE 303.

  In this figure, the NE 303 has an interface (I / F) function 21 for a terminal and a line interface (I / F) 22 function for the automatic setting / deleting apparatus 10.

  The operation of the network device management system configured as described above will be described with reference to FIG. FIG. 4 is a sequence diagram in the case where the automatic setting / deleting apparatus 10 performs line setting for the new NE 303.

  In the figure, when the newly installed NE 303 is first connected to the network (NE cable is connected to the network), the newly installed NE 303 automatically detects that it is connected to the network, and automatically sets and deletes its own unique address. 10 (S1). This unique address is a unique ID for uniquely identifying itself, and is, for example, a production number or a number assigned in advance by a business operator. When receiving the unique address notified from the newly installed NE 303, the automatic setting / deleting apparatus 10 refers to the address correspondence table 15 and searches whether the unique address of the newly installed NE 303 is in the address correspondence table 15 (S2). To do.

FIG. 5 is a diagram showing an example of the structure of the address correspondence table 15, and fields of “unique address”, “interface number”, and “line number” are provided for each NE (NE # 1 to NE # n). And that information is described using a topology structure,
Is retained.

  The automatic setting / deleting apparatus 10 searches the “unique address” field of the address correspondence table 15 and terminates the processing if the unique address is in the “unique address” field of the address correspondence table 15 (not a new NE). To be considered). On the other hand, if the unique address is not in the “unique address” field of the address correspondence table 15, an authentication request to the newly installed NE 303 is notified (S3). In the new NE 303, authentication is performed according to a predetermined authentication algorithm, and the result of authentication is notified to the automatic setting / deleting apparatus 10 as an authentication response (S4). When the automatic setting / deleting device 10 confirms the validity of the new NE 303 from the authentication response, the automatic setting / deleting device 10 uses the information related to the topology included in the address correspondence table 15 for the new line setting address necessary for line setting with the new NE 303. The generated line setting address is assigned to the newly installed NE 303 (S5) and notified (S6). At that time, the automatic setting / deleting apparatus 10 performs bridge setting for a new line for its network interface function 12.

  FIG. 6 is a diagram showing an example of automatic setting of a line setting address and bridge setting in the automatic setting / deleting apparatus 10 when the line interface function 22 on the side of the newly installed NE 303 is an ATM transmission line interface.

  When the automatic setting / deleting apparatus 10 receives the unique address from the newly installed NE 303, it automatically sets the address contents of the layer 2 (data link layer) to the newly installed NE 303 (see (1) below).

In ATM transmission, IP packets are cellized using AAL5 and transferred through a permanent connection (PVC) virtual connection. Therefore, the content of the set layer 2 address is, for example,
(1) Content of layer 2 address AAL5 setting PVC setting VPI = 0
VCI = 1
It becomes.

  At this time, the automatic setting / deleting device 10 automatically performs its own bridge setting (see (2) below).

(2) Automatic bridge setting contents VPI = 0
VCI = 1
Examples of the network interface function 12 include:
IP address: 10.10.88.1
Network prefix: 255.255.255.248
MAC address: 00.00.0c. 83.06.80
Is set.

  The new NE 303 holds the line setting address notified from the automatic setting / deleting apparatus 10 as described above (S7), and then transmits a response (ACK) indicating completion of the holding to the automatic setting / deleting apparatus 10 (S8). To do. When the automatic setting / deleting apparatus 10 receives the ACK, communication with the newly-installed NE 303 is started (S9).

  In the above embodiment, the case where the transmission path interface of the newly installed NE 303 accommodated in the automatic setting / deleting apparatus 10 is ATM has been described as an example. However, even if the transmission path interface is different for each wireless system (a plurality of transmission path interfaces). By managing the interface (when there is STM, Ethernet (registered trademark), etc. in addition to ATM), the unique address, interface number, and line number accommodated in the automatic setting / deleting device 10 in the address correspondence table 15, Automatic line setting for NE is possible for each transmission path interface.

  As described above, according to the present embodiment, if the unique address notified from the NE connected to the network is not in the pre-stored address correspondence table, the automatic setting / deleting apparatus 10 newly sets the NE. Judge as NE. Then, a new line setting address is automatically generated and notified to the NE. Thereby, the line setting of the new NE can be automatically completed without performing the line setting work that has been performed manually. That is, plug-and-play for a newly-installed NE becomes possible, and the management cost of network devices can be greatly reduced.

  In the above embodiment, the unique address is notified to the automatic setting / deleting device 10 when the new NE 303 is connected to the network, but it is detected that the new NE 303 is connected to the network. At this point, the detection result may be once notified to the automatic setting / deleting apparatus 10 and a request for a unique address may be issued from the automatic setting / deleting apparatus 10.

  In the above embodiment, when the new NE 303 is connected to the network, the automatic setting / deleting apparatus 10 automatically gives a line setting address to the NE to start communication. When an NE already connected to the network is removed from the network, the automatic setting / deleting device 10 is notified of non-connection information indicating that the NE has been removed from the network. When the automatic setting / deleting device 10 detects the non-connection information notification, the automatic setting / deleting device 10 deletes the line setting information related to the NE from the address correspondence table 15. As a result, the line setting information deletion operation that has been performed manually in the past is automatically performed, so that the management cost of the network device can be reduced.

  In the above embodiment, the line setting address to be assigned to the newly installed NE 303 is determined based on the topology information held in the address correspondence table. However, the present invention is not limited to this. For example, the address correspondence table may obtain and store a line setting address that can be assigned in advance based on the topology information, and read the line setting address from the automatic setting / deleting apparatus 10.

  When the automatic setting / deleting apparatus 10 completes the line setting for the new NE 303 as described above, the automatic setting / deleting apparatus 10 automatically sets the transmission power value for the terminal interface function 21 of the new NE 303. This transmission power value automatic setting processing is performed, for example, according to the sequence shown in FIG.

(Transmission power value setting of new NE303)
In FIG. 7, the automatic setting / deleting apparatus 10 transmits a burst test signal all at once to the communicating NEs (not including NEs newly connected to the network) (destination address is NE). Terminal interface (however, even if no terminal is present, a notification channel or the like that can be transmitted by the NE to the terminal interface is used)). Each NE device in communication transmits a test signal from the automatic setting / deleting device 10 to the newly-installed NE 303 using a broadcast channel or the like (S12). The new NE 303 notifies the automatic setting / deleting device 10 of the received power value A (total value from each NE) of the test signal transmitted from each NE (S13). When receiving the notification of the received power value A from the new NE 303, the automatic setting / deleting apparatus 10 holds the received power value A (S14) and transmits the test signal to the new NE 303 again (S15). At that time, the transmission power value B of the test signal transmitted by itself is held (S16). The new NE 303 notifies the automatic setting / deleting device 10 of the received power value C of the received test signal (S17).

  The automatic setting / deleting apparatus 10 holds the received power value C notified from the new NE 303 (S18), and uses the received power value A, transmission power value B, and received power value C that are stored in the terminal interface of the new NE 303. The optimum transmission power of the function 21, that is, the transmission power transmitted from the antenna of the base station is calculated if the newly installed NE 303 is a base station (S19). Specifically, the calculation is performed as follows.

(Calculation procedure 1)
First, the transmission loss between the newly installed NE 303 and the automatic setting / deleting device 10 is calculated from the transmission power value B-reception power value C.

(Calculation procedure 2)
Since the received power value A can be regarded as interference power from other NEs, assuming that CIR (Carrier-Interference power Ratio) is D, the desired transmission power value E of the newly installed NE 303 is expressed by the following equation (1). Is calculated by

E = A × D + B−C (1)
When the automatic setting / deleting apparatus 10 finishes calculating the desired transmission power value E of the new NE 303 using the above equation (1), it notifies the new NE 303 of the calculation result (S20), and sets the transmission power to the new NE 303. Let it be done.

  As described above, according to the present embodiment, the automatic setting / deleting apparatus 10 considers the transmission loss between the new NE 303 and itself, and also considers the interference power experienced by the new NE 303, and increases the transmission power of the new NE 303. decide. As a result, NE transmission power setting after line setting, which has been performed manually in the past, can be performed more accurately and automatically.

  In the above embodiment, the automatic setting / deleting device 10 is built in the access router. However, the present invention is not limited to this. For example, the automatic setting / deleting apparatus 10 may be configured as a server and provided in any node on the network.

  As described above, according to the present embodiment, by providing the automatic setting / deleting device 10 on the network, it is possible to delete the line setting or the line setting information for the newly installed NE, which has been performed in the conventional manual operation. The work is automated and the cost of manual work can be reduced.

  In the above example, the network device setting control device according to claim 1 corresponds to the automatic setting / deleting device 10. Functions of the automatic setting / deleting device 10 are line setting means, search means, auto configuration setting means, line setting address generation means, first line setting address notification means, second line setting address notification means, unique address notification request Means, data deletion means, test signal transmission means, transmission loss estimation means, test signal transmission instruction means, interference power estimation means, and first to third transmission power setting means. The address correspondence table 15 of the automatic setting / deleting apparatus 10 corresponds to the address correspondence table, and the function of the address correspondence table 15 corresponds to the line setting address generation means. Further, the NE function corresponds to a unique address notification means, a connection state information notification means, a first reception level measurement / notification means, and a second reception level measurement / notification means.

  As described above, according to the present invention, if the unique address notified from the NE connected to the network is not in the address correspondence table held in advance, the automatic setting / deleting device newly establishes the NE. This is judged as NE. Then, a new line setting address is automatically generated and notified to the NE. Thereby, the line setting of the new NE can be automatically completed without performing the line setting work that has been performed manually. That is, plug-and-play for a newly-installed NE becomes possible, and the management cost of network devices can be greatly reduced.

1 is a configuration diagram of a network device management system according to an embodiment of the present invention. FIG. 2 is a functional configuration diagram of the automatic setting / deleting device shown in FIG. 1. It is a functional block diagram of NE shown in FIG. FIG. 10 is a sequence diagram when the automatic setting / deleting apparatus performs line setting for a newly installed NE. It is a figure which shows an example of the structure of an address corresponding table. It is a figure which shows an example of the line setting address automatic assignment | providing and bridge | bridging setting in an automatic setting / deletion apparatus when the line interface function by the side of new NE is an ATM transmission line interface. It is a sequence diagram at the time of automatically setting the transmission power value for the terminal interface function of the new NE.

Explanation of symbols

10 automatic setting / deleting device 11 line interface function 12 network interface function 15 address correspondence table 21 terminal interface function 22 line interface function 100 wireless system A
101-103, 201-203, 301-303 Network equipment (NE)
200 Wireless system B
300 Wireless system C

Claims (15)

In the network device management system that sets the conditions necessary for starting communication of network devices connected to the network,
A network device setting control device having line setting means for setting a line for the network device on the network;
The network device includes a unique address notification means for notifying the network device setting control device of an address unique to the network device,
The line setting means of the network device setting control device includes:
An address correspondence table storing line setting information corresponding to an address unique to the network device;
Search means for searching whether the unique address notified from the network device is in the address correspondence table;
Auto-configuration setting means for transferring configuration setting information necessary for line setting with the network device to the network device when the address is not found in the address correspondence table as a result of the search. A network device management system characterized by that. The network device management system according to claim 1,
The address correspondence table holds topology information indicating a connection state of the network device to the network,
The auto configuration setting means includes line setting address generation means for determining a line setting address based on the topology information;
A network device management system comprising: first line setting address notifying means for notifying the determined line setting address to a network device newly connected to a network as the configuration setting information. The network device management system according to claim 1,
The address correspondence table has topology information indicating a connection state of the network device to the network, and includes line setting address storage means for obtaining and storing an assignable line setting address based on the topology information.
The auto configuration setting means determines a line setting address that can be allocated from the line setting address storage means, and notifies the determined line setting address to the network device newly connected to the network as the configuration setting information. And a second line setting address notifying means. The network device management system according to any one of claims 1 to 3,
The auto configuration setting means comprises an authentication means for authenticating the network device before notifying the network device newly connected to the network of the line setting address. . The network device management system according to any one of claims 1 to 4,
The network device includes connection state information notification means for notifying the network device setting control device of connection information indicating a connection / disconnection state with the network,
The network device setting control device, when receiving information indicating a connection state from the network device, a unique address notification request means for requesting the network device to notify a unique address;
A network device management system, comprising: data deletion means for deleting line setting information corresponding to a network device from the address correspondence table when information indicating a non-connection state is received from the network device. In the network equipment management system according to claim 2 or 3,
The network device setting control device notifies the network device of a line setting address for the newly connected network device by the first line setting address notifying unit or the second line setting address notifying unit. A test signal transmitting means for transmitting the test signal;
The network device includes first reception level measurement / notification means for measuring a reception signal level of the test signal and notifying the network device setting control device,
The network device setting control device, based on the received signal level, transmission loss estimation means for estimating a transmission loss of a transmission path from the network device setting control device to the network device;
A network device management system comprising: first transmission power setting means for setting transmission power of the network device in consideration of the transmission loss. The network device management system according to claim 6, wherein
The network device setting control device includes a test signal transmission instruction unit that transmits a test signal to a newly connected network device from another network device already connected to the network,
The network device includes a second reception level measurement / notification means for measuring a reception signal level of the test signal and notifying the network device setting control device,
The network device setting control device is configured to estimate interference power from the other network device based on the received signal level;
Second transmission power setting means for setting the transmission power of the network device in consideration of the interference power;
3. A network device management system, further comprising third transmission power setting means for setting transmission power of the network device in consideration of the transmission loss and the interference power. In a network device management method in a network device management system for setting conditions necessary for starting communication of a network device connected to a network,
A network device setting control device for setting a line for the network device on the network;
The network device notifies the network device setting control device of an address unique to the network device;
The network device setting control device includes:
Store line setting information corresponding to the address unique to the network device in an address correspondence table;
Search whether the unique address notified from the network device is in the address correspondence table,
As a result of the search, when there is no unique address in the address correspondence table, configuration setting information necessary for line setting with the network device is transferred to the network device. Method. A network device setting control device for setting a line for a network device connected to a network,
An address correspondence table storing line setting information corresponding to an address unique to the network device;
Search means for searching whether the unique address notified from the network device is in the address correspondence table;
Auto-configuration setting means for transferring configuration setting information necessary for line setting with the network device to the network device when the address is not found in the address correspondence table as a result of the search. A network device setting control device. The network device setting control device according to claim 9,
The address correspondence table holds topology information indicating a connection state of the network device to the network,
The auto configuration setting means includes line setting address generation means for determining a line setting address based on the topology information;
A network device setting control apparatus comprising: a first line setting address notifying unit for notifying the determined line setting address to the network device newly connected to the network as the configuration setting information. The network device setting control device according to claim 9 or 10,
The address correspondence table has topology information indicating a connection state of the network device to the network, and includes line setting address storage means for obtaining and storing an assignable line setting address based on the topology information.
The auto configuration setting means determines a line setting address that can be allocated from the line setting address storage means, and notifies the determined line setting address to the network device newly connected to the network as the configuration setting information. A network device setting control apparatus comprising: a second line setting address notifying unit. The network device setting control device according to any one of claims 9 to 11,
The auto configuration setting means includes an authentication means for authenticating the network device before notifying the network device newly connected to the network of the line setting address. apparatus. The network device setting control device according to any one of claims 9 to 12,
A unique address notification requesting unit for requesting a notification of a unique address to the network device when information indicating a connection state is received from the network device;
A network device setting control apparatus comprising: a data deleting unit that deletes line setting information corresponding to a network device from the address correspondence table when information indicating a non-connected state is received from the network device. The network device setting control device according to any one of claims 9 to 12,
After notifying the line setting address for the newly connected network device by the first line setting address notifying unit or the second line setting address notifying unit by the automatic setting unit, a test signal is sent to the network device. A test signal transmitting means for transmitting
Test signal transmission instructing means for transmitting a test signal from another network device already connected to the network to the newly connected network device;
When information on the received signal level of the signal transmitted by the test signal transmitting means is received from the newly connected network device, from the network device setting control device to the network device based on the received signal level Transmission loss estimation means for estimating the transmission loss of the transmission path of
First transmission power setting means for setting transmission power of the network device in consideration of the transmission loss;
When information on the received signal level of the signal transmitted from the other network device transmitted by the test signal transmission instruction means is received from the newly connected network device, from the other network device based on the received signal level. Interference power estimation means for estimating the interference power of
Second transmission power setting means for setting the transmission power of the network device in consideration of the interference power;
And a third transmission power setting unit configured to set transmission power of the network device in consideration of the transmission loss and the interference power. A network device connected to the network,
A unique address notification means for notifying the network device setting control device of a unique address of the network device;
Connection state information notifying means for notifying the network device setting control device of connection information indicating a connection / disconnection state with the network;
A first reception level measurement / notification means for measuring a reception signal level of a test signal transmitted from a network device setting control device that performs line setting for itself and notifying the network device setting control device;
And a second reception level measuring / notifying means for measuring a received signal level of a test signal transmitted from another network device already connected to the network and notifying the network device setting control device. Network equipment.

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