KR20080063438A - A method that keeps suspended mode and allows remote wakeup of a computer that is connected to the network by defining wakeup patterns - Google Patents

Abstract

A method for keeping standby mode and providing remote wakeup on a computer connected to a network by defining wakeup patterns is provided to keep the standby mode state of a computer and wake up the computer by a terminal connected to a network at a desired time by a software method without additional hardware, thereby enabling a user to access an in-company computer or a home computer to perform necessary operations. A method for keeping standby mode and providing remote wakeup on a computer connected to a network by defining wakeup patterns comprises the following steps of: setting a wakeup pattern for satisfying keeping the standby mode and remote wakeup; assigning the wakeup pattern to a remote wakeup target computer(330); and transmitting the wakeup pattern to the remote wakeup target computer from a network terminal(310).

Description

A method that keeps suspended mode and allows remote wakeup of a computer that is connected to the network by defining wakeup patterns}

1 is a diagram illustrating a wakeup packet basic setting value;

2 is a diagram illustrating a wakeup packet pattern, and

3 is a diagram illustrating a remote wake up using a wakeup packet pattern.

Explanation of symbols on the main parts of the drawings

310: user terminal 320: server

330: target computer

The present invention relates to a method for providing a wake-up and remote wake-up of a computer connected to a network by defining a wake-up packet pattern.

A computer with a network adapter that supports Wake-up On Lan (WOL) and that supports Advanced Configuration and Power Interface (ACPI) receives a magic packet or a wake-up packet over the network after entering standby mode for low power consumption. It is possible to set it to wake up again. Among the wakeup packets, it is possible to define a pattern. An example of a wakeup packet value basically set is shown in FIG. 1.

Referring to FIG. 1, a unicast packet, an ARP request for device address acquisition, and a NetBIOS name query packet are included. If you put a computer with these defaults in a wake-up packet pattern into standby mode, packets from unicast packets, ARP requests to obtain device addresses, and NetBIOS name queries are sent out of standby mode. This feature helps the computer to perform its normal role on the network, but as a result, the computer wakes up when the user doesn't want it or can't predict it.

On the other hand, in order to prevent this phenomenon, by ignoring the wake-up packet and setting to wake up only as a magic packet or not to wake up with any packet, the standby mode can be kept stable, but the other devices on the network can maintain their presence. Because of the inability to keep constantly aware or provide information for new perceptions, over time, they become inaccessible over the network except in extremely limited LAN environments, making it impossible to wake the computer remotely over the network. This is a problem caused by the intercommunication protocol between the network devices and the computers that do not fully consider the computer that has switched to the standby mode for power management.

Accordingly, an object of the present invention is to minimize wake-up by unnecessary packet events transmitted through a network by a computer connected to the network and to maintain a standby mode, and to remotely wake up by a remote terminal connected to the network when the user requests it. It provides a method for setting the network environment to perform the.

The network environment setting method according to the present invention for achieving the above object includes defining an appropriate wakeup packet pattern and assigning the defined wakeup packet pattern to a remote wakeup target computer.

When an arbitrary packet is delivered through the network, the network adapter compares the packet against a previously registered wake-up pattern and, if a match is found, wakes up the entire computer system from standby mode and delivers the packet to the computer system.

1 is a wakeup packet pattern set basically, and FIG. 2 is a wakeup packet pattern defined in the present invention. The ARP packet pattern 110 of FIG. 1 is to respond to a device address translation request for an IP address of the system (172.16.22.12 in the example of the figure). The ARP protocol is used to determine the Ethernet hardware address of another IP host network device that is connected to the network on the same network. Here, the equipment connected to the network includes a computer. In this case, the device connected to the network must process the ARP packet to announce its existence on the network, or it can not be woken up through the network.

On the other hand, even if the Ethernet hardware address is already known, ARP packets can be delivered to check whether the equipment still exists on the network. If it is. Packets for acknowledgment requests are not necessary for a computer connected to the network to maintain their existence on the network. However, in the case of the default pattern, when the ARP response acknowledgment packet occurs, the computer enters standby mode. The side effects of waking up regularly occur.

In this case, the ARP request packet for knowing the Ethernet hardware address is transmitted in broadcast, the packet for the ARP response confirmation request generated for network maintenance is the difference is transmitted in unicast. Accordingly, if the wakeup pattern is limited to the ARP request transmitted through broadcast, such as 210, the ARP response confirmation request packet for maintenance that is not transmitted unnecessarily may be excluded and the standby mode may be maintained.

The unicast packet destined for the Ethernet hardware of a specific device is also one of the wakeup packet patterns basically set by the system (120). This, too, is an obstacle to maintaining the standby mode because it matches packets transmitted by the Internet service provider and unnecessary packets by software installed in other network equipment. On the other hand, the packet sent by the user-designated network terminal needs to react normally and wake up from the standby mode.

In both cases, the pattern is designated to match only the packet pattern sent from a specific network terminal (220), or more generally, a pattern that is specifically defined between a user-specified network terminal and a target computer, i. If there is a pattern long enough and complex enough to not duplicate the packet, it can be satisfied simultaneously by specifying the matching pattern. For example, in the wakeup pattern, specify the IP address of the computer that will send the remote wakeup packet as the source IP address.

The NetBIOS name query packet pattern is also included in the basic wakeup pattern (130). This is to reply when a query for the NetBIOS name of the computer is requested. However, waking a computer over the network does not require a NetBIOS name, so this pattern is also removed from the wake-up pattern list to prevent unnecessary waking from standby.

When a network terminal having an IP address registered in the wake-up packet pattern 220 is forwarded to a remote wake-up target computer, or a packet having a specific pattern of a specific length at a specific location inside is remote wake-up target When the packet is delivered to the computer, the remote wake-up target computer is woken up by the corresponding wake-up packet pattern 220. If the IP address of the remote wake-up computer disappears from the ARP table cache of the remote wake-up computer gateway, the gateway sends an ARP request packet as a broadcast. In this case, according to the wakeup packet pattern 210 set in the remote wake-up computer, Wakes up. Therefore, by using the wake-up packet pattern shown in FIG. 2, it is possible to perform a remote wake up when the user wants while keeping the computer connected to the network in the WAN in standby mode.

However, even when unnecessary network packets are attempted to be delivered to a remote wake-up target computer while the gateway's ARP table cache is gone, the gateway will send an ARP request packet as a broadcast, which will eventually wake up the remote wake-up target computer. Is an inevitable part of the network operation method. To cope with this situation, you can install software on the remote wake-up computer to monitor for wake-up events, so that if you wake up even if the packet is not delivered from the network terminal you specified, you can immediately put it back to standby mode to minimize power consumption. have.

In this case, the user may actually wake up by pressing the power switch of the computer or by operating the keyboard or the mouse, and in such a case, it should not be set to the standby mode again. If you are unable to detect these events, display a dialog on the screen that allows you to enter standby mode, so that if you do not have any input for a period of time (for example, 15 to 30 seconds), you will be prompted to enter your computer's input device. It may be determined that the operation has not been performed, and it may be set back to the standby mode. Although the network operation may inevitably wake up in this manner, hacking-related packets in the company's environment or ISP's environment without the user installing software that receives packets from unspecified network terminals such as P2P software or web servers. This is rarely the case as long as you normally block. In addition, this case occurs only when the gateway's ARP table cache disappears. Once this occurs, the table cache is generated and does not occur again for a certain period of time.

3 is an example of using the terminal 310 connected to the network to remotely wake up the target computer 330 using the wakeup packet pattern of FIG. First, in the target computer 330, all of the wake-up patterns set as default values are deleted, and the wake-up packet shown in FIG. 2, that is, the IP packet pattern 220 including the broadcast ARP packet 210 and the server 320 IP as a source address. Register as a wake-up pattern (350). In operation 355, the target computer 330 is connected to the server 320. This server connection is later used as a path to deliver wake-up packets for remote wake up. Here, pattern registration and server connection do not matter which one is performed first. Thereafter, the target computer 330 is automatically switched to the standby mode by a user's explicit command or a preset of the computer. After that, all packets that do not match the defined wake-up packet pattern are ignored and the standby mode is maintained as the user intended. Then, the user connects to the server 320 from a terminal 310 such as a computer, a PDA, or a mobile phone connected to the WAN, inquires a list of target computers, selects a desired computer, and transmits a remote wake-up command to the server 320 ( 360). Server 320 forwards the wakeup packet to the target computer (370). Here, the wakeup packet is an arbitrary packet originating from the server 320 IP, and is a general TCP packet so as not to be deleted by a packet filtering rule such as a gateway relaying a network connection between the server 320 and the target computer 330. It is preferable to set it as. When the wake-up packet is delivered, the target computer wakes up from standby.

In this example, since the server 320 always maintains a connection with the remote wake-up target computer, even in an environment where an external connection attempt or a direct packet transmission without a connection cannot be attempted, for example, a target computer existing in a NAT environment. It can provide remote wake up function. If the remote wake-up target computer is in an environment in which a direct connection from outside or a packet is received without a connection, the packet may be sent directly without the server 320.

So far, we have described the environment in which the remote wake-up target computer must handle ARP to announce its existence on the network, but there may be cases where the network environment must handle other protocols than ARP, in which case the pattern 210 Instead, you register a pattern for that protocol.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

As described above, according to the present invention, due to the expansion of the Internet network, the spread of portable devices, and the appearance of related services, a user can access a company computer or a home computer with a terminal such as a PDA or a mobile phone from anywhere to perform necessary tasks. Can be. However, there is a problem that the user has to keep the access target computer on for external use, which may not occur when.

Computers with WOL-capable network adapters and Advanced Configuration and Power Interface (ACPI) can alleviate some of these problems by using remote power on and standby functions. However, in case of remote power-on, it can be operated only in LAN environment, and separate hardware device configuration is needed in WAN. In addition, the standby mode allows remote wake-up operation at a desired time, but the problems described above also exist.

According to the present invention, no additional hardware is required, and the computer can maintain the standby mode of the computer only by a software method, and remote wake-up to a terminal connected to the network can be performed at a desired time.

Claims (4)

Setting a wake-up pattern that satisfies standby mode and remote wake up; Assigning the wakeup pattern to a remote wake-up target computer; And Transmitting the wake-up pattern from the network terminal to the remote wake-up target computer; and maintaining a standby mode of the computer connected to the network through the wake-up packet pattern definition. The method of claim 1, The wakeup pattern may include a broadcast ARP request pattern, IP packet pattern that sets the IP address of the network terminal to which the wake-up pattern will be sent, or more specifically, a pattern that is specifically defined between the network terminal and the target computer, that is, long enough and not enough to duplicate any packet from a particular offset within the packet. A wake-up packet pattern definition, characterized in that the complex pattern for maintaining the standby mode and remote wake-up of the computer connected to the network. The method of claim 2, In order to respond to a case where the computer wakes up by sending a broadcast ARP request packet for transmitting an unnecessary network packet, the packet of the second pattern of claim 2 was not delivered from a user-specified network terminal. And a wake-up packet pattern definition method for providing wake-up and remote wake-up of a computer connected to a network, characterized in that it comprises software for resetting the standby mode if the user does not wake up from the standby mode. The method of claim 2, For network environments in which a remote wake-up target computer must process a protocol other than ARP to announce its presence on the network, specify a pattern that logically acts as the first pattern of paragraph 2 for that protocol. How to maintain wake mode and provide remote wake-up of computer connected to network by defining wake-up packet pattern.

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