JP5282625B2 - RELAY DEVICE AND CLIENT SERVER SYSTEM CONTROL METHOD - Google Patents

Description

  The present invention relates to a power saving technique of a client server system.

  Patent Document 1 discloses a technology for controlling the transition of a peripheral device connected to an information processing device via a network to a low power consumption mode. In this technique, a peripheral device periodically transmits a response request to each information processing device having a record of accessing the peripheral device, and monitors the response. If there is no response from any of the information processing apparatuses, the mode immediately shifts to the low power consumption mode. This reduces wasteful power consumption in situations where there is no user.

JP 2007-108862 A

  In the technique described in Patent Literature 1, when a new information processing apparatus is added to the network, the peripheral apparatus may shift to the low power consumption mode before the information processing apparatus accesses the peripheral apparatus. There is. In this case, the user of the information processing apparatus waits for the use of the peripheral device until the peripheral device returns from the low power consumption mode to the normal mode. The technique described in Patent Document 1 can reduce wasteful power consumption of a peripheral device (server), but no consideration is given to power saving of an information processing device (client) that uses the peripheral device. Not.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique capable of reducing wasteful power consumption of not only a server but also a client.

In order to solve the above-described problems, the present invention provides a relay device that relays data communication between a client and a server that supports remote control of starting and stopping. Monitor. When the operating status of any server connected to the local relay device changes from active to inactive, the client is connected to the local relay device and uses the service provided by this server. Stop all clients that want to. Further, when the operation state of any of the clients connected to the own relay apparatus shifts to the stopped from running, if running status of all clients to use the same service as the client stopped, the own A server connected to the relay device that provides a service used by these clients is stopped.

For example, the present invention is a relay device that relays data communication between network devices corresponding to remote control of start and stop ,
A plurality of connection means for connecting the network device;
Monitoring means for monitoring the operating state of the network device connected to the connection means based on the link status of the connection means or the packet reception frequency in the connection means for each connection means;
Storage means for storing service ID and server / client type information, which are identification information of handling services, for each network device;
Control means for remotely controlling start and stop of each of the network devices connected to the plurality of connection means,
The control means includes
When the monitoring result by the monitoring unit of the network device whose type information stored in the storage unit indicates a server shifts from operating to stopping, the network unit and the service ID are stored in the storage unit. Stop the network device that matches and the type information indicates a client,
When the monitoring result by the monitoring unit of the network device in which the type information stored in the storage unit indicates a client shifts from operating to stopping, the storage unit stores the network device and the service ID. If the monitoring result by the monitoring unit of all the network devices that match and the type information indicates a client is stopped , all the network devices and service IDs match in the storage unit, and the type The network device whose information indicates the server is stopped.

  According to the present invention, wasteful power consumption of not only a server but also a client can be reduced.

FIG. 1 is a schematic diagram of a network system to which a first embodiment of the present invention is applied. FIG. 2 is a schematic configuration diagram of the relay device 1 shown in FIG. FIG. 3A is a diagram schematically illustrating an example of registered contents in the device information storage unit 131, and FIG. 3B is a diagram schematically illustrating an example of registered contents in the link state storage unit 132. is there. FIG. 4 is a flowchart for explaining processing related to operation control of the network device 2 executed by the relay device 1 shown in FIG. FIG. 5 is a flowchart for explaining the stop control process (S15) shown in FIG. FIG. 6 is a flowchart for explaining the activation control process (S16) shown in FIG. FIG. 7 is a sequence diagram for explaining a first example relating to operation control of the network system shown in FIG. FIG. 8 is a sequence diagram for explaining a first example relating to operation control of the network system shown in FIG. FIG. 9 is a sequence diagram for explaining a second example of the operation control of the network system shown in FIG. FIG. 10 is a sequence diagram for explaining a second example of the operation control of the network system shown in FIG.

  Embodiments of the present invention will be described below.

  FIG. 1 is a schematic diagram of a network system to which an embodiment of the present invention is applied.

  As shown in the figure, the network system according to the present embodiment is configured by connecting a plurality of network devices 2 to a relay device 1 via LAN cables (UTP cables) 3. Here, the network device 2 is a server that provides a predetermined service (services A and B in FIG. 1) such as an IP telephone and Web distribution, or a client that uses the service. The relay device 1 relays data communication between the network devices 2 connected to the own relay device 1 and controls the operation of the network device 2 that provides or uses the service for each service.

  FIG. 2 is a schematic configuration diagram of the relay device 1 shown in FIG.

  As illustrated, the relay device 1 includes a plurality of connection ports 11, a relay processing unit 12, a storage unit 13, a link monitoring unit 14, a POE control unit 15, a WOL control unit 16, and a main control unit 17. And having.

  The connection port 11 is an interface for connecting the network device 2 via the LAN cable 3 and has a Power Over Ethernet (Ethernet is a registered trademark) function.

  The relay processing unit 12 performs data relay processing between the connection ports 11 such as a router, a switching hub, and a repeater.

  The storage unit 13 includes a device information storage unit 131 and a link state storage unit 132.

  In the device information storage unit 131, various information of each network device 2 connected to the own relay device 1 is stored. FIG. 3A is a diagram schematically illustrating an example of registered contents in the device information storage unit 131.

  As illustrated, a record 1310 is registered in the device information storage unit 131 for each network device 2 connected to the own relay device 1. The record 1310 includes a field 1311 in which a device ID for identifying the network device 2 is registered, a field 1312 in which the address (MAC address, IP address, etc.) of the network device 2 is registered, and handling of the network device 2 The field 1313 in which a service ID for identifying a service is registered, the field 1314 in which the device type (“server” or “client”) of the network device 2 is registered, and the startup procedure of the network device 2 are It has a registered field 1315 and a field 1316 in which the stop procedure of this network device 2 is registered.

  In FIG. 3A, “WOL” means Wake On Lan. When “WOL” is designated as the activation procedure of a certain network device 2, the network device 2 is activated by transmitting an activation command to the network device 2 using a Wake On Lan magic packet. Similarly, when “WOL” is designated as the stop procedure of a certain network device 2, this network device 2 is stopped by sending a stop command to this network device 2 using a Wake On Lan magic packet. .

  In FIG. 3A, “POE” means Power Over Ethernet (Ethernet is a registered trademark). When “POE” is designated as the activation procedure of a certain network device 2, the network device 2 is activated by starting the power supply using the LAN cable 3. Similarly, when “POE” is designated as the stop procedure of a certain network device 2, the network device 2 is stopped by stopping the power supply using the LAN cable 3.

  On the other hand, the link state storage unit 132 stores the link state between the connection port 11 of the own relay device 1 and the network device 2 connected thereto. FIG. 3B is a diagram schematically illustrating an example of registered contents in the link state storage unit 132.

  As illustrated, a record 1320 is registered in the link state storage unit 132 for each connection port 11. The record 1320 includes a field 1321 in which a port number for identifying the connection port 11 is registered, and a field 1322 in which the device ID of the network device 2 connected to the connection port 11 via the LAN cable 3 is registered. The field 1323 in which the monitoring result of the link state (“link up” or “link down”) of this connection port 11 by the link monitoring unit 14 is registered, and the previous monitoring result of the link state of this connection port 11 And a field 1324 in which a state change (“changed” or “no change”) is registered.

  For example, the link monitoring unit 14 periodically monitors the link state of each connection port 11, and the link state (field 1323) and state change (field 1324) of each connection port 11 stored in the link state storage unit 132. ).

  The POE control unit 15 controls power supply by the Power Over Ethernet (Ethernet is a registered trademark) of each connection port 11 in accordance with an instruction from the main control unit 17.

  The WOL control unit 16 follows this instruction from the main control unit 17 to start or stop the network device 2 connected to the connection port 11 specified by this instruction via the LAN cable 3. Sends a Wake On Lan magic packet.

  And the main control part 17 controls each part 11-16 of the own relay apparatus 1 centralizedly.

  FIG. 4 is a flowchart for explaining processing related to operation control of the network device 2 executed by the relay device 1 shown in FIG.

  First, the link monitoring unit 14 waits for a link state monitoring timing to arrive due to elapse of a predetermined time (S10). Then, when the monitoring timing of the link state has arrived (YES in S10), the link monitoring unit 14 checks the link state of each connection port 11 and sets each connection port 11 stored in the link state storage unit 132. The link status (field 1323) and status change (field 1324) are updated (S11).

  Next, the main control unit 17 selects the record 1320 of the unselected connection port 11 from the link state storage unit 132 (S12), and the state change registered in the field 1324 of this record 1320 is “changed”. It is checked whether or not there is (S13). When the state change is “no change” (NO in S13), the process proceeds to S17.

  On the other hand, when the state change registered in the field 1324 of the selected record 1320 is “changed” (YES in S13), the main control unit 17 indicates that the link state registered in the field 1323 of the record 1320 is “ It is further examined whether or not “link down” (S14). When the link state is “link down” (YES in S14), a stop control process described later is performed (S15), and the process proceeds to S17. When the link state is “link up” (NO in S14), the activation control process described later is performed (S16), and the process proceeds to S17.

  In S <b> 17, the main control unit 17 checks whether or not the record 1320 of the unselected connection port 11 exists in the link state storage unit 132. If such a record 1320 exists (YES in S17), the process returns to S12. On the other hand, if it does not exist (NO in S17), the process returns to the start.

  FIG. 5 is a flowchart for explaining the stop control process (S15) shown in FIG.

  First, the main control unit 17 searches the device information storage unit 131 for the record 1310 using the device ID registered in the field 1322 of the record 1320 selected in S12 of FIG. 4 as a key. Accordingly, the device information record 1310 of the network device 2 connected to the connection port 11 specified by the selected record 1320 is specified (S1500).

  Next, the main control unit 17 checks whether or not the device type registered in the field 1314 of the record 1310 identified in S1500 is “server” (S1501). When the device type registered in the field 1314 of the specified record 1310 is “server” (YES in S1501), the main control unit 17 acquires the service ID from the field 1313 of the specified record 1310. Then, an unselected record 1310 in which the service ID is registered in the field 1313 and the device type “client” is registered in the field 1314 is selected from the device information storage unit 131 (S1502).

  Next, the main control unit 17 searches the link state storage unit 132 for the record 1320 using the device ID registered in the field 1311 of the record 1310 selected in S1502 as a key, and is registered in the field 1323 of this record 1320. It is checked whether or not the current link state is “link up” (S1503).

  If the link state is “link up” (YES in S1503), the network device 2 (selected client) specified by this record 1310 is followed according to the stop procedure registered in the field 1316 of the record 1310 selected in S1502. Is called) (S1504), and the process proceeds to S1505.

  Specifically, when the stop procedure registered in the field 1316 of the record 1310 selected in S1502 is “WOL”, the main control unit 17 controls the WOL control unit 16 to select the address of the selected client (record 1310). The Wake On Lan magic packet including the address registered in the field 1312) is transmitted from the connection port 11 specified by the port No. in the field 1321 of the record 1320 searched in S1503. If the stop procedure registered in the field 1316 of the record 1310 selected in S1502 is “POE”, the main control unit 17 controls the POE control unit 15 to search for the field 1321 in the record 1320 searched in S1503. The power supply by the Power Over Ethernet (Ethernet is a registered trademark) of the connection port 11 specified by the port number is stopped.

  On the other hand, if the link state registered in the field 1323 of the record 1320 searched in S1503 is “link down” (NO in S1503), the process proceeds to S1505 without performing S1504.

  In step S <b> 1505, the main control unit 17 stores an unselected record 1310 in which the service ID acquired in step S <b> 1502 is registered in the field 1313 and the device type “client” is registered in the field 1314. Whether it exists in 131 is checked. If it exists (YES in S1505), the process returns to S1502, and if it does not exist (NO in S1505), this flow ends.

  When the device type registered in the field 1314 of the record 1310 identified in S1500 is “client” (NO in S1501), the main control unit 17 starts from the field 1313 of this record 1310. Get the service ID. Then, an unselected record 1310 in which the service ID is registered in the field 1313 and the device type “client” is registered in the field 1314 from the device information storage unit 131 is a record 1310 other than the record 1310. Select (S1506).

  Next, the main control unit 17 searches the link state storage unit 132 for the record 1320 using the device ID registered in the field 1311 of the record 1310 selected in S1506 as a key, and is registered in the field 1323 of this record 1320. It is checked whether or not the current link state is “link down” (S1507). If the link state is “link up” (NO in step S1507), the flow ends. On the other hand, if the link state is “link down” (YES in S1507), the main control unit 17 registers the record 1310 other than the record 1310 specified in S1500 and the service ID acquired in S1506 in the field 1313. It is checked whether or not an unselected record 1310 in which the device type “client” is registered in the field 1314 exists in the device information storage unit 131 (S 1508). If there is such an unselected record 1310 (YES in S1508), the process returns to S1506.

  On the other hand, if there is no such unselected record 1310 (NO in S1508), all clients using the service specified by the service ID acquired in S1506 are stopped. In this case, the main control unit 17 searches the device information storage unit 131 for the record 1310 in which the service ID acquired in S1506 is registered in the field 1313 and the device type “server” is registered in the field 1314. The record 1320 in which the device ID registered in the field 1311 of the record 1310 is registered in the field 1322 is searched from the link state storage unit 132 (S1509).

  The main control unit 17 then stops the network device 2 (referred to as the target server) specified by the record 1310 according to the stop procedure registered in the field 1316 of the searched record 1310 (S1510), finish.

  Specifically, when the stop procedure registered in the field 1316 of the record 1310 selected in S1509 is “WOL”, the main control unit 17 controls the WOL control unit 16 to control the address of the target server (record 1310). The Wake On Lan magic packet including the address registered in the field 1312) is transmitted from the connection port 11 specified by the port No. in the field 1321 of the record 1320 searched in S1509. When the stop procedure registered in the field 1316 of the record 1310 selected in S1509 is “POE”, the main control unit 17 controls the POE control unit 15 to search for the field 1321 in the record 1320 searched in S1509. The power supply by the Power Over Ethernet (Ethernet is a registered trademark) of the connection port 11 specified by the port number is stopped.

  FIG. 6 is a flowchart for explaining the activation control process (S16) shown in FIG.

  First, the main control unit 17 searches the device information storage unit 131 for the record 1310 using the device ID registered in the field 1322 of the record 1320 selected in S12 of FIG. 4 as a key. Accordingly, the device information record 1310 of the network device 2 connected to the connection port 11 specified by the selected record 1320 is specified (S1600).

  Next, the main control unit 17 checks whether or not the device type registered in the field 1314 of the record 1310 identified in S1600 is “server” (S1601).

  When the device type registered in the field 1314 of this record 1310 is “server” (YES in S1601), the main control unit 17 acquires the service ID from the field 1313 of this record 1310. Then, an unselected record 1310 in which the service ID is registered in the field 1313 and the device type “client” is registered in the field 1314 is selected from the device information storage unit 131 (S1602).

  Next, the main control unit 17 searches the link state storage unit 132 for the record 1320 using the device ID registered in the field 1311 of the record 1310 selected in S1602 as a key, and registers it in the field 1323 of the searched record 1320. It is checked whether or not the linked state is “link down” (S1603). If the link state is “link down” (YES in S1603), the network device 2 (selected client) specified by the record 1310 is selected according to the activation procedure registered in the field 1315 of the record 1310 selected in S1602. Is called) (S1604), and the process proceeds to S1605.

  Specifically, when the activation procedure registered in the field 1315 of the record 1310 selected in S1602 is “WOL”, the main control unit 17 controls the WOL control unit 16 to select the address of the selected client (record 1310). The Wake On Lan magic packet including the address 1312) is transmitted from the connection port 11 specified by the port ID of the field 1321 of the record 1320 searched in S1603. If the activation procedure registered in the field 1315 of the record 1310 selected in S1602 is “POE”, the main control unit 17 controls the POE control unit 15, and the field 1321 of the record 1320 searched in S1603. The power supply by the Power Over Ethernet (Ethernet is a registered trademark) of the connection port 11 specified by the port ID is started.

  On the other hand, if the link state registered in the field 1323 of the record 1320 searched in S1603 is “link up” (NO in S1603), the process proceeds to S1605 without performing S1604.

  In step S <b> 1605, the main control unit 17 stores an unselected record 1310 in which the service ID acquired in step S <b> 1602 is registered in the field 1313 and the device type “client” is registered in the field 1314. Whether it exists in 131 is checked. If such a record 1310 exists (YES in S1605), the process returns to S1602, and if it does not exist (NO in S1605), this flow ends.

  When the device type registered in the field 1314 of the record 1310 identified in S1600 is “client” (NO in S1601), the main control unit 17 starts from the field 1313 of this record 1310. Get the service ID. Then, an unselected record 1310 in which the service ID is registered in the field 1313 and the device type “server” is registered in the field 1314 is searched from the device information storage unit 131 (S1606).

  Next, the main control unit 17 searches the link state storage unit 132 for the record 1320 using the device ID registered in the field 1311 of the record 1310 searched in S1606 as a key, and registers it in the field 1323 of the searched record 1320. It is checked whether or not the linked state is “link down” (S1607). If the link state is “link up” (NO in step S1607), this flow ends. On the other hand, if the link state is “link down” (YES in S1607), the main control unit 17 is specified by this record 1310 in accordance with the activation procedure registered in the field 1315 of the record 1310 searched in S1606. The network device 2 (referred to as a target server) is activated (S1608), and this flow ends.

  Specifically, when the activation procedure registered in the field 1315 of the record 1310 searched in S1606 is “WOL”, the main control unit 17 controls the WOL control unit 16 to control the address of the target server (record 1310). Wake On Lan magic packet including the address of the field 1312) is transmitted from the connection port 11 specified by the port ID of the field 1321 of the record 1320 searched in S1607. If the activation procedure registered in the field 1315 of the record 1310 searched in S1606 is “POE”, the main control unit 17 controls the POE control unit 15 and the field 1321 of the record 1320 searched in S1607. The power supply by the Power Over Ethernet (Ethernet is a registered trademark) of the connection port 11 specified by the port ID is started.

  7 and 8 are sequence diagrams for explaining a first example relating to operation control of the network system shown in FIG.

  7 and 8 show an example of operation control of the relay device 1 for the network device 2A functioning as a service A server and the network devices 2B to 2D functioning as service A clients.

  Here, the start / stop procedure of the network devices 2A and 2D is “WOL”, and the start / stop procedure of the network devices 2B and 2C is “POE”. The network devices 2B and 2C operate with power supplied from the relay device 1, and the network devices 2A and 2D operate with power supplied from a power source different from the relay device 1.

  The relay device 1 and the network devices 2A to 2D are all in operation (S201 to S205), and the relay device 1 is linked up with each of the network devices 2A to 2D (S206).

  In this state, when the network device 2A functioning as the server of the service A receives a stop operation from an operator (system administrator of the service A) (S207), the network device 2A stops the network device 2A (S208). As a result, the connection between the network device 2A and the relay device 1 is linked down (S209).

  When the relay device 1 detects that the connection with the network device 2A is linked down, the relay device 1 confirms that the network device 2A is a server of the service A, and the network devices 2B to 2D functioning as clients of the service A Stop according to each stop procedure. Specifically, for the network devices 2B and 2C, power supply by Power Over Ethernet (Ethernet is a registered trademark) is stopped (S210 and S211), thereby stopping the network devices 2B and 2C (S213 and S214). . Also, the Wake On Lan magic packet is transmitted to the network device 2D (S212), and the network device 2D is stopped (S215). As a result, the connection between each of the network devices 2B to 2D and the relay device 1 is linked down (S216).

  Thus, when the server 2A of the service A stops, all the clients 2B to 2D of the service A automatically stop.

  Here, when the network device 2D functioning as a client of the service A receives an activation operation from an operator (such as a user of the service A) (S217), the network device 2D activates the network device 2D (S218). Thereby, the connection between the network device 2D and the relay device 1 is linked up (S219).

  When the relay device 1 detects that the connection with the network device 2D is linked up, the relay device 1 confirms that the network device 2D is a client of the service A, and starts up the network device 2A functioning as a server of the service A. Start according to Specifically, the Wake On Lan magic packet is transmitted to the network device 2A (S220), thereby starting the network device 2A (S221). Thereby, the connection between the network device 2A and the relay device 1 is linked up (S222).

  When the relay apparatus 1 detects that the connection with the network apparatus 2A has been linked up, the relay apparatus 1 confirms that the network apparatus 2A is a server of the service A, and the network apparatuses 2B and 2C functioning as clients of the service A Start according to each startup procedure. Specifically, power supply by Power Over Ethernet (Ethernet is a registered trademark) is started (S223, S224), and the network devices 2B, 2C are activated (S225, S226). Thereby, the connection between each of the network devices 2B and 2C and the relay device 1 is linked up (S227).

  As described above, when any of the clients 2D is activated in a state where all the clients 2B to 2D and the server 2A of the service A are stopped, all the other clients 2B and 2C and the server 2A are automatically activated. to start.

  9 and 10 are sequence diagrams for explaining a second example relating to the operation control of the network system shown in FIG.

  9 and 10 show an example of operation control of the relay device 1 for the network device 2E functioning as a service B server and the network devices 2F to 2H functioning as service B clients.

  Here, the start / stop procedure of the network devices 2E to 2H is “WOL”. Further, the network devices 2E to 2H operate by power feeding from a power source different from that of the relay device 1.

  It is assumed that the relay device 1 and the network devices 2E to 2H are all in operation (S251 to S255), and the relay device 1 is linked up with each of the network devices 2E to 2H (S256).

  In this state, when the network device 2F that functions as a client of the service B receives a stop operation from an operator (such as a user of the service B) (S257), the network device 2F stops the local network device 2F (S258). Thereby, the connection between the network device 2F and the relay device 1 is linked down (S259).

  When the relay device 1 detects that the connection with the network device 2F has been linked down, the relay device 1 confirms that the network device 2F is a client of the service B, and other network devices 2G and 2H functioning as clients of the service B Check the link status of. Here, the connections with the network devices 2G and 2H are all linked up. In this case, the relay device 1 does nothing.

  Similarly, when the network device 2G functioning as a client of the service B receives a stop operation from an operator (such as a user of the service B) (S260), the network device 2G stops the local network device 2G (S261). Thereby, the connection between the network device 2G and the relay device 1 is linked down (S262).

  When the relay apparatus 1 detects that the connection with the network apparatus 2G has been linked down, the relay apparatus 1 confirms that the network apparatus 2G is a client of the service B, and other network apparatuses 2F and 2H that function as clients of the service B Check the link status of. Here, the connection with the network device 2G is linked down, but the connection with the network device 2H is linked up. In this case, the relay device 1 does nothing.

  Similarly, when the network device 2H functioning as a service B client receives a stop operation from an operator (such as a user of the service B) (S263), the network device 2H stops the network device 2H (S264). Thereby, the connection between the network device 2H and the relay device 1 is linked down (S265).

  When the relay apparatus 1 detects that the connection with the network apparatus 2H has been linked down, the relay apparatus 1 confirms that the network apparatus 2H is a client of the service B, and other network apparatuses 2F and 2G functioning as clients of the service B Check the link status of. Here, both the network devices 2F and 2G are linked down. In this case, the relay device 1 stops the network device 2E functioning as a service B server according to the stop procedure. Specifically, by transmitting a Wake On Lan magic packet to the network device 2E (S266), the network device 2E is stopped (S267). Thereby, the connection between the network device 2E and the relay device 1 is linked down (S268).

  As described above, when all of the clients 2F to 2H of the service B are stopped, the server 2E of the service B is automatically stopped.

  Here, when the network device 2E functioning as a service B server accepts a start operation from an operator (service B system administrator or the like) (S269), the network device 2E starts up its own network device 2E (S270). Thereby, the connection between the network device 2E and the relay device 1 is linked up (S271).

  When the relay device 1 detects that the connection with the network device 2E is linked up, the relay device 1 confirms that the network device 2E is a service B server, and the network devices 2F to 2H functioning as clients of the service B Start according to each startup procedure. More specifically, the network devices 2F to 2H are activated (S275 to S277) by transmitting Wake On Lan magic packets to the network devices 2F to 2H (S272 to S274). Thereby, the connection between each of the network devices 2F to 2H and the relay device 1 is linked up (S278).

  In this way, when the server 2E is activated in the state where all of the clients 2F to 2H and the server 2E of the service B are stopped, all the clients 2F to 2H are automatically activated.

  The embodiment of the present invention has been described above.

  In the present embodiment, the relay device 1 monitors the operating states of the client and the server (network device 2) connected to the own relay device 1. When any server connected to the own relay device 1 shifts from running to stopped, the client is connected to the own relay device 1 and uses a service provided by this server. Stop all clients. In addition, a client connected to the own relay device 1 when all clients using the same service shift from operating to stopping, the server connected to the own relay device 1, Stop the servers that provide the services used by these clients.

  Therefore, according to the present embodiment, it is possible to reduce the wasteful power consumption of not only the server but also the client, and the power saving of the client server system can be achieved.

  Further, in the present embodiment, the relay device 1 is a server connected to the own relay device 1 when any client connected to the own relay device 1 shifts from being stopped to operating. If the server providing the service used by these clients is stopped, it is started. Further, when any server connected to the own relay device 1 shifts from being stopped to operating, it is a client connected to the own relay device 1 and uses a service provided by this server. If the client is stopped, start it.

  Therefore, according to the present embodiment, the entire client server system can be activated from any client or server.

  Further, in the present embodiment, the relay device 1 starts / stops the network device 2 connected to the own relay device 1 according to each start / stop procedure stored in the device information storage unit 131. Therefore, according to the present embodiment, it is possible to control the start / stop of these network devices 2 from the relay device 1 even when network devices 2 having different start / stop methods coexist in the network system.

  In the present embodiment, the relay device 1 determines the operating state of the network device 2 by monitoring the link state with the network device 2. Therefore, according to the present embodiment, it is not necessary to transmit a response request (PING) on the network for determining the operating state of the network device 2, and therefore traffic for determining the operating state is generated on the network. Therefore, it is possible to determine the operating state of the network device 2.

  In addition, this invention is not limited to said embodiment, Many deformation | transformation are possible within the range of the summary.

  For example, in the above-described embodiment, the case of using either Wake On Lan magic packet or power supply control by Power Over Ethernet (Ethernet is a registered trademark) as an example of the start / stop procedure of the network device 2 has been described. . However, the present invention is not limited to this. The starting and stopping of the network device 2 may be controlled using a unique packet.

  In the above embodiment, the relay device 1 is a client connected to the self-relay device 1 when any server connected to the self-relay device 1 shifts from a stop state to an operation state. Therefore, all clients that use the service provided by this server are activated. However, the present invention is not limited to this. Any device that activates at least one of the clients that use the service provided by the server that has been moved from the stopped state to the active state may be used. For example, only a predetermined client may be activated.

  In the above embodiment, the relay device 1 determines the operating state of the network device 2 by monitoring the link state with the network device 2. However, the present invention is not limited to this. For example, the operating state of the network device 2 may be determined by monitoring the frequency of packets sent from the network device 2 to the own relay device 1. Specifically, for each connection port 11, when the number of packets per unit time that arrive from the network device 2 via the LAN cable 3 is equal to or greater than a predetermined value, it is determined that the network device 2 is in operation, and the predetermined value If it is less than that, it is determined to be stopped.

  Further, in the above embodiment, the relay device 1 is the network device 2 connected to the own relay device 1, and the monitoring result of the operation state of each network device 2 connected to the own relay device 1. Alternatively, a notification may be sent to a predetermined network device 2 (presence server or the like) set to be excluded from the start / stop control target.

  Further, in the above embodiment, the configuration of the relay apparatus 1 shown in FIG. 2 may be realized in hardware by an integrated logic IC such as ASIC (Application Specific Integrated Circuit) or FPGA (Field Programmable Gate Array). Alternatively, it may be realized by software by a computer such as a DSP (Digital Signal Processor). Alternatively, in a general-purpose computer such as a PC (Personal Computer) equipped with an auxiliary storage device such as a CPU, memory, HDD, DVD-ROM, and a communication interface such as a NIC (Network Interface Card) and a modem, the CPU executes a predetermined program. It may be realized by loading from an auxiliary storage device onto a memory and executing it.

  1: relay device, 2: network device, 3: LAN cable, 11: connection port, 12: relay processing unit, 13: storage unit, 14: link monitoring unit, 15: POE control unit, 16: WOL control unit, 17 : Main control unit, 131: device information storage unit, 132: link state storage unit

Claims (4)

A relay device that relays data communication between network devices corresponding to remote control of start and stop ,
A plurality of connection means for connecting the network device;
Monitoring means for monitoring the operating status of the network device connected to the connection means based on the link status or packet reception frequency of the connection means for each connection means;
Storage means for storing service ID and server / client type information, which are identification information of handling services, for each network device;
Control means for remotely controlling start and stop of each of the network devices connected to the plurality of connection means,
The control means includes
When the monitoring result by the monitoring unit of the network device whose type information stored in the storage unit indicates a server shifts from operating to stopping, the network unit and the service ID are stored in the storage unit. Stop the network device that matches and the type information indicates a client,
When the monitoring result by the monitoring unit of the network device in which the type information stored in the storage unit indicates a client shifts from operating to stopping, the storage unit stores the network device and the service ID. If the monitoring result by the monitoring unit of all the network devices that match and the type information indicates a client is stopped , all the network devices and service IDs match in the storage unit, and the type A relay device characterized in that the network device whose information indicates a server is stopped. The relay device according to claim 1,
The control means includes
When the monitoring result by the monitoring unit of the network device whose type information stored in the storage unit indicates a client shifts from a stop state to an operating state, the network unit and the service ID are stored in the storage unit. If the monitoring result by the monitoring unit of the network device that matches and the type information indicates the server is stopped, the type information starts the network device that indicates the server,
When the monitoring result by the monitoring unit of the network device whose type information stored in the storage unit indicates a server shifts from the stop state to the operating state, the storage unit stores the network device and the service ID. The relay apparatus is characterized by activating at least one of the network apparatuses that match and the type information indicates a client. The relay device according to claim 1 or 2,
In the storage means,
For each network device, a startup procedure and a shutdown procedure of the network device are further stored,
The control means includes
The relay device according to claim 1, wherein the network device is controlled to start and stop according to a startup procedure and a stop procedure of the network device stored in the storage unit. A control method of a client server system having a plurality of clients and at least one server interconnected via a relay device,
The plurality of clients and the at least one server are:
Each corresponds to remote control of start and stop, and is connected to one of the connection ports of the relay device,
The relay device is
Managing services provided by the at least one server and services used by the plurality of clients;
For each connection port, based on the link state or packet reception frequency of the connection port, monitor the operating state of the client or the server connected to the connection port ,
When the operating state of any of the servers shifts from operating to stopping, the service provided by the server is specified, all the clients that use the specified service are specified, and the specified service is specified Remotely control all the clients that use
When the operating state of any one of the clients shifts from operating to stopping, the service used by the client is specified, all the clients using the specified service are specified, and the specified service is If the operating state of all the clients to be used is stopped, the server that provides the specified service is specified, and the server that provides the specified service is stopped by remote control Server system control method.

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