최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0138536 (1998-08-24) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 155 인용 특허 : 9 |
A wireless data network includes a wireless packet switched data network for end users that divides mobility management into local, micro, macro and global connection handover categories and minimizes handoff updates according to the handover category. The network integrates MAC handoff messages wit
A wireless data network includes a wireless packet switched data network for end users that divides mobility management into local, micro, macro and global connection handover categories and minimizes handoff updates according to the handover category. The network integrates MAC handoff messages with network handoff messages. The network separately directs registration functions to a registration server and direct routing functions to inter-working function units. The network provides an intermediate XTunnel channel between a wireless hub (also called access hub AH) and an inter-working function unit (IWF unit) in a foreign network, and it provides an IXTunnel channel between an inter-working function unit in a foreign network and an inter-working function unit in a home network. The network enhances the layer two tunneling protocol (L2TP) to support a mobile end system, and it performs network layer registration before the start of a PPP communication session.
A wireless data network includes a wireless packet switched data network for end users that divides mobility management into local, micro, macro and global connection handover categories and minimizes handoff updates according to the handover category. The network integrates MAC handoff messages wit
A wireless data network includes a wireless packet switched data network for end users that divides mobility management into local, micro, macro and global connection handover categories and minimizes handoff updates according to the handover category. The network integrates MAC handoff messages with network handoff messages. The network separately directs registration functions to a registration server and direct routing functions to inter-working function units. The network provides an intermediate XTunnel channel between a wireless hub (also called access hub AH) and an inter-working function unit (IWF unit) in a foreign network, and it provides an IXTunnel channel between an inter-working function unit in a foreign network and an inter-working function unit in a home network. The network enhances the layer two tunneling protocol (L2TP) to support a mobile end system, and it performs network layer registration before the start of a PPP communication session. esponse to the notification, to indicate that the information has been updated, the second channel having a bandwidth smaller than a bandwidth of the first channel, wherein the message sent to the remote client device comprises an address identifying the information updated at the remote network server; receiving a request from the remote client device, the request including an indication of the address; and forwarding the updated information to the remote client device via the first channel in response to the request. 2. A method as recited in claim 1, wherein the remote client device is a mobile device operating on the wireless network, wherein the remote network server operates on a landline data network. 3. A method as recited in claim 2, further comprising maintaining a user account associated with the remote client device, wherein said identifying comprises using a subscriber identifier in the notification to extract a client device identifier from the user account. 4. A method as recited in claim 1, further comprising fetching the updated information from the remote network server. 5. A method as recited in claim 4, further comprising providing the updated information to the remote client device via the first channel. 6. A method as recited in claim 4, further comprising: receiving a request from the remote client device to establish a communication session via the wideband channel; authenticating the remote client device; and forwarding the updated information to the remote client device via the first channel. 7. A method as recited in claim 1, further comprising maintaining a queue of notifications received from one or more remote network servers, wherein information in each of the notifications is to be delivered to one of a plurality of remote client devices. 8. A method as recited in claim 7, further comprising assigning a sequence number to the received notification prior to sending the message to the client device; and storing the received notification in the queue of notifications according to the sequence number. 9. A method as recited in claim 1, wherein the notification further comprises an action type, the action type for use in causing the remote client device to react to the notification upon the remote client device receiving the message. 10. A method comprising: receiving a notification at a link system coupling a landline data network to a wireless network when information at a remote network server is updated, wherein the remote network server is remote with respect to the link system, and wherein the information is available to a remote client device via a first channel; identifying in the link system the remote client device as being associated with the notification; and sending a message corresponding to the notification from the link system to the remote client device via a second channel in response to the notification, to indicate that the information has been updated, the second channel having a bandwidth smaller than a bandwidth of the first channel; and causing a cached copy of the information in the remote client device to be invalidated, so as to cause the updated specific information to be fetched when the cached copy is accessed by a user of the remote client device. 11. A method as recited in claim 9, further comprising causing an alert message to be generated with respect to the action type to inform a user of the remote client device of the information updated at the network server. 12. A method as recited in claim 1, wherein the address comprises a Uniform Resource Locator. 13. A method as recited in claim 1, wherein sending the message corresponding to the notification comprises: assigning a notification identifier to the notification; and transforming the notification along with the assigned notification identifier to the message so that the message is transportable in the narrowband channel. 14. A method as recited in claim 13, wherein the message comp rises a PUSH protocol data unit (PDU). 15. A method as recited in claim 13, wherein said transforming comprises encoding at least part of the notification message into a format transportable by a message system according to a predefined encoding/decoding scheme. 16. A method as recited in claim 13, wherein said transforming comprises encoding the message in a short message service (SMS) format. 17. An intermediary network node for use in an infrastructure coupling a wireless network to a landline network, the intermediary network node comprising: a messenger to receive a notification that information on a web server on the landline network has been updated, the information being subscribed by a client device on the wireless network, and to generate, in response to the notification, a corresponding message for delivery to the client device via a narrowband channel to indicate the information has been updated; and a pull engine to obtain the updated information from the web server in response to a request from the client device and to provide the updated information to the client device via a wideband channel. 18. An intermediary network node as recited in claim 17, wherein the intermediary network node comprises a proxy server to proxy requests and responses to the requests between a plurality of mobile client devices on the wireless network and a plurality of servers on the landline network. 19. An intermediary network node as recited in claim 17, wherein the messenger comprises an encoder to encode the message for delivery to the client device in a short message service (SMS) format. 20. An intermediary network node as recited in claim 17, wherein the messenger comprises a notification queue, and wherein the messenger stores the notification in the notification queue when the messenger does not successfully deliver the corresponding message to the client device. 21. An intermediary network node as recited in claim 17, wherein the messenger comprises a notification manager to maintain a queue of notifications received from one or more remote web servers on the landline network, wherein information in each of the notifications is to be delivered to one of a plurality of mobile client devices on the wireless network. 22. An intermediary network node as recited in claim 21, wherein the messenger further comprises a protocol data unit (PDU) constructor to construct the message for delivery to the client device in the form of a PDU. 23. An intermediary network node as recited in claim 21, wherein the messenger further comprises an encoder to encode the message for delivery to the client device in a short message service (SMS) format. 24. An intermediary network node as recited in claim 21, wherein the messenger further comprises a segmentor to segment the message into a plurality of notification messages when a maximum message length is exceeded. 25. An intermediary network node as recited in claim 17, wherein the notification comprises an address identifying the updated information in the web server. 26. An intermediary network node as recited in claim 25, wherein the address represents a hyperlink to the updated information. 27. An intermediary network node as recited in claim 25, wherein the notification further comprises a subscriber identification corresponding to the client device. 28. An intermediary network node as recited in claim 17, wherein the messenger delivers the message to the client device when the subscriber identification in the notification is matched to one of the user accounts in the proxy server. 29. An intermediary network node as recited in claim 28, wherein the messenger assigns a notification identification to the received notification from the web server and wherein the corresponding notification message includes the notification identification. 30. An apparatus comprising: means for receiving a notification at a link system coupling a landline data network to a wireless network when information at a remote network server is updated, wherein the remote network server is remote with respect to the link system, and wherein the information is available to a remote client device via a first channel; means for identifying in the link system the remote client device as being associated with the notification; means for sending a message corresponding to the notification from the link system to the remote client device via a second channel in response to the notification, to indicate that the information has been updated, the second channel having a bandwidth smaller than a bandwidth of the first channel; and means for causing a cached copy of the information in the remote client device to be invalidated, so as to cause the updated specific information to be fetched when the cached copy is accessed by a user of the remote client device. 31. An apparatus as recited in claim 30, wherein the remote client device is a mobile device operating on the wireless network, wherein the remote network server operates on the landline data network. 32. An apparatus as recited in claim 31, further comprising means for maintaining a user account associated with the remote client device, wherein said means for identifying comprises means for using a subscriber identifier in the notification to extract a client device identifier from the user account. 33. An apparatus as recited in claim 30, further comprising means for fetching the updated information from the remote network server. 34. An apparatus as recited in claim 33, further comprising means for providing the updated information to the remote client device via the first channel. 35. An apparatus as recited in claim 33, further comprising: means for receiving a request from the remote client device to establish a communication session via the wideband channel; means for authenticating the remote client device; and means for forwarding the updated information to the remote client device via the first channel. 36. An apparatus as recited in claim 30, further comprising means for maintaining a queue of notifications received from one or more remote network servers, wherein information in each of the notifications is to be delivered to one of a plurality of remote client devices. 37. An apparatus as recited in claim 36, further comprising means for assigning a sequence number to the received notification prior to sending the message to the client device; and means for storing the received notification in the queue of notifications according to the sequence number. 38. An apparatus as recited in claim 30, wherein the notification further comprises an action type, the action type for use in causing the remote client device to react to the notification upon the remote client device receiving the message. 39. An apparatus as recited in claim 38, further comprising means for causing an alert message to be generated with respect to the action type to inform a user of the remote client device of the information updated at the remote network server. 40. An apparatus as recited in claim 30, wherein the address comprises a Uniform Resource Locator. 41. An apparatus comprising: means for receiving a notification at a link system coupling a landline data network to a wireless network when information at a remote network server is updated, wherein the remote network server is remote with respect to the link system, and wherein the information is available to a remote client device via a first channel; means for identifying in the link system the remote client device as being associated with the notification; and means for sending a message corresponding to the notification from the link system to the remote client device via a second channel in response to the notification, to indicate that the information has been updated, the second channel having a bandwidth smaller than a bandwidth of the first channel, wherein the message sent to the remote client device comprises an address i dentifying the information updated at the remote network server; means for receiving a request from the remote client device, the request including an indication of the address; and means for forwarding the updated information to the remote client device via the first channel in response to the request. 42. An apparatus as recited in claim 30, wherein the means for sending the message corresponding to the notification comprises: means for assigning a notification identifier to the notification; and means for transforming the notification along with the assigned notification identifier to the message so that the message is transportable in the narrowband channel. 43. An apparatus as recited in claim 30, wherein the message is a PUSH protocol data unit (PDU). 44. An apparatus as recited in claim 43, wherein said means for transforming comprises means for encoding at least part of the notification message into a format transportable by a message system according to a predefined encoding/decoding scheme. 45. A method as recited in claim 10, wherein the first channel and the second channel are both implemented at least partially on the wireless network. 46. An intermediary network node as recited in claim 17, wherein the narrowband channel and the wideband channel are both implemented at least partially on the wireless network. 47. An apparatus as recited in claim 30, wherein the first channel and the second channel are both implemented at least partially on the wireless network. formation is stored in the pickup information storing unit; and a deleting step for deleting the information which has been stored in the pickup information storing unit from the information stored in the address list storing unit as well as deleting the same information as the head information from the information stored in the key address list storing unit, and thereafter performing said pickup step on condition that some information remains in the key address list storing unit. 3. A topology information automatic configuration method for configuring topology information indicating how to connect each equipment, based on configuration information, including equipment name, IP address and subnet mask and further including group ID for distinguishing each subnetwork as for an interface of the equipment connected to one of the subnetworks given the identical network address existing in the network, established for every interface of several equipment including one management equipment connected to a network, comprising the steps of: a network address calculation step for obtaining network address of a subnetwork to which an interface is connected, as for every interface, based on the IP address and the subnet mask of the interface, and as for an interface having no group ID in the configuration information, storing a pair of the network address of the interface and the equipment name of the corresponding equipment having the same interface into an address list storing unit, and as for an interface having the group ID in the configuration information, storing a pair of the network address of the interface and the equipment name of the corresponding equipment having the same interface into the address list storing unit; a management equipment key address registration step for storing the network address within information in a key address list storing unit when the information about an interface of the management equipment stored in the address list storing unit in said network address calculation step includes no group ID, and storing a pair of the network address and the group ID within the information into the key address list storing unit when the information includes group ID; a pickup step for picking up the same information as for the network address and the group ID as the head information stored in the key address list storing unit, from the information stored in the address list storing unit, and storing the same into a pickup information storing unit; and a topology information configuration step for configuring the topology information indicating that each equipment having an interface whose information is stored in the pickup information storing unit in said pickup step, is connected to the identical subnetwork represented by the network address or a pair of the network address and the group ID within the information and that the equipment having a plurality of interfaces, of all the equipment each having an interface whose information is stored in the pickup information storing unit, connects together the subnetworks indicated by the network addresses of the interfaces owned by the equipment or each pair of the network address and group ID of an interface. 4. A topology information automatic configuration method as set forth in claim 3, further comprising: an additional registration step for, when there exists the information of an interface of the equipment which has a plurality of interfaces and whose information is not stored in the key address list, in the information of each interface stored in the pickup information storing unit, additionally storing a pair of the network address and the corresponding equipment name of the interface in the rearmost portion of the key address list storing unit, as for an interface including no group ID in the configuration information, of all the interfaces owned by the equipment, and additionally storing a set of the network address, the equipment name and the gr oup ID of the interface in the key address list storing unit, as for an interface including the group ID in the configuration information; and a deleting step for deleting the information which has been stored in the pickup information storing unit from the information stored in the address list storing unit as well as deleting the same information as the head information from the information stored in the key address list storing unit, and thereafter performing said pickup step on condition that some information remains in the key address list storing unit. 5. A topology information automatic configuration means for configuring topology information indicating how to connect each equipment, based on configuration information, including equipment name, IP address, and subnet mask, established for every interface of management equipment and a plurality of managed equipment connected to a network, comprising the steps of: a network address calculation means for obtaining network address of a subnetwork to which an interface is connected, as for every interface, based on the IP address and the subnet mask of the interface, and storing a pair of the obtained network address of each interface and the equipment name of the corresponding equipment having the interface, into an address list storing unit; a management equipment key address registration means for storing a pair of the network address of an interface owned by the management equipment which is obtained by said network address calculation means and the corresponding equipment name, into a key address list storing unit; a pickup means for picking up the same information as that of the head of the network addresses stored in the key address list storing unit, from the information of each interface stored in the address list storing unit, and storing the same into a pickup information storing unit; and a topology information configuration means for configuring the topology information indicating that the equipment having an interface whose information is stored in the pickup information storing unit by said pickup means, is connected to the identical subnetwork represented by the network address within the information and that the equipment having a plurality of interfaces, of all the equipment each having an interface whose information is stored in the pickup information storing unit, connect together the subnetworks indicated by the network addresses of the plurality of interfaces stored in the address list storing unit. 6. A topology information automatic configuration system as set forth in claim 5, further comprising: an additional registration means for additionally storing a pair of the network address and the corresponding equipment name as for all the interfaces owned by the equipment in the rearmost portion of the key address list storing unit, when there exists some equipment which has a plurality of interfaces and whose information is not stored in the key address list, in all the equipment each having an interface whose information is stored in the pickup information storing unit; and a deleting means for deleting the information which has been stored in the pickup information storing unit from the information stored in the address list storing unit as well as deleting the same information as the head information from the information stored in the key address list storing unit, and thereafter performing said pickup means on condition that some information remains in the key address list storing unit. 7. A topology information automatic configuration system for configuring topology information indicating how to connect each equipment, based on configuration information, including equipment name, IP address and subnet mask and further including group ID for distinguishing each subnetwork as for an interface of the equipment connected to one of the subnetworks given the identical network address existing in the network, established for every interfac e of several equipment including one management equipment connected to a network, comprising the steps of: a network address calculation means for obtaining network address of a subnetwork to which an interface is connected, as for every interface, based on the IP address and the subnet mask of the interface, and as for an interface having no group ID in the configuration information, storing a pair of the network address of the interface and the equipment name of the corresponding equipment having the same interface into an address list storing unit, and as for an interface having the group ID in the configuration information, storing a pair of the network address of the interface and the equipment name of the corresponding equipment having the same interface into the address list storing unit; a management equipment key address registration means for storing the network address within information in a key address list storing unit when the information about an interface of the management equipment stored in the address list storing unit by said network address calculation means includes no group ID, and storing a pair of the network address and the group ID within the information into the key address list storing unit when the information includes group ID; a pickup means for picking up the same information as for the network address and the group ID as the head information stored in the key address list storing unit, from the information stored in the address list storing unit, and storing the same into a pickup information storing unit; and a topology information configuration means for configuring the topology information indicating that each equipment having an interface whose information is stored in the pickup information storing unit in said pickup means, is connected to the identical subnetwork represented by the network address or a pair of the network address and the group ID within the information and that the equipment having a plurality of interfaces, of all the equipment each having an interface whose information is stored in the pickup information storing unit, connects together the subnetworks indicated by the network addresses of the interfaces owned by the equipment or each pair of the network address and group ID of an interface. 8. A topology information automatic configuration system as set forth in claim 7, further comprising: an additional registration means for, when there exists the information of an interface of the equipment which has a plurality of interfaces and whose information is not stored in the key address list, in the information of each interface stored in the pickup information storing unit, additionally storing a pair of the network address and the corresponding equipment name of the interface in the rearmost portion of the key address list storing unit, as for an interface including no group ID in the configuration information, of all the interfaces owned by the equipment, and additionally storing a set of the network address, the equipment name and the group ID of the interface in the key address list storing unit, as for an interface including the group ID in the configuration information; and a deleting means for deleting the information which has been stored in the pickup information storing unit from the information stored in the address list storing unit as well as deleting the same information as the head information from the information stored in the key address list storing unit, and thereafter performing said pickup means on condition that some information remains in the key address list storing unit. 9. A computer readable memory storing a topology information automatic configuration program for configuring topology information indicating how to connect each equipment, based on configuration information, including equipment name, IP address, and subnet mask, established for every interface of management equipment and a plurality of managed equipment connected t o a network, the topology information automatic configuration program comprising: a network address calculation step for obtaining network address of a subnetwork to which an interface is connected, as for every interface, based on the IP address and the subnet mask of the interface, and storing a pair of the obtained network address of each interface and the equipment name of the corresponding equipment having the interface, into an address list storing unit; a management equipment key address registration step for storing a pair of the network address of an interface owned by the management equipment which is obtained in said network address calculation step and the corresponding equipment name, into a key address list storing unit; a pickup step for picking up the same information as that of the head of the network addresses stored in the key address list storing unit, from the information of each interface stored in the address list storing unit, and storing the same into a pickup information storing unit; and a topology information configuration step for configuring the topology information indicating that the equipment having an interface whose information is stored in the pickup information storing unit in said pickup step, is connected to the identical subnetwork represented by the network address within the information and that the equipment having a plurality of interfaces, of all the equipment each having an interface whose information is stored in the pickup information storing unit, connect together the subnetworks indicated by the network addresses of the plurality of interfaces stored in the address list storing unit. 10. A computer readable memory storing a topology information automatic configuration program as set forth in claim 9, the topology information automatic configuration program further comprising: an additional registration step for additionally storing a pair of the network address and the corresponding equipment name as for all the interfaces owned by the equipment in the rearmost portion of the key address list storing unit, when there exists some equipment which has a plurality of interfaces and whose information is not stored in the key address list, in all the equipment each having an interface whose information is stored in the pickup information storing unit; and a deleting step for deleting the information which has been stored in the pickup information storing unit from the information stored in the address list storing unit as well as deleting the same information as the head information from the information stored in the key address list storing unit, and thereafter performing said pickup step on condition that some information remains in the key address list storing unit. 11. A computer readable memory storing a topology information automatic configuration program for configuring topology information indicating how to connect each equipment, based on configuration information, including equipment name, IP address and subnet mask and further including group ID for distinguishing each subnetwork as for an interface of the equipment connected to one of the subnetworks given the identical network address existing in the network, established for every interface of several equipment including one management equipment connected to a network, the topology information automatic configuration program comprising: a network address calculation step for obtaining network address of a subnetwork to which an interface is connected, as for every interface, based on the IP address and the subnet mask of the interface, and as for an interface having no group ID in the configuration information, storing a pair of the network address of the interface and the equipment name of the corresponding equipment having the same interface into an address list storing unit, and as for an interface having the group ID in the configuration information, storing a pair of the network address of t he interface and the equipment name of the corresponding equipment having the same interface into the address list storing unit; a management equipment key address registration step for storing the network address within information in a key address list storing unit when the information about an interface of the management equipment stored in the address list storing unit in said network address calculation step includes no group ID, and storing a pair of the network address and the group ID within the information into the key address list storing unit when the information includes group ID; a pickup step for picking up the same information as for the network address and the group ID as the head information stored in the key address list storing unit, from the information stored in the address list storing unit, and storing the same into a pickup information storing unit; and a topology information configuration step for configuring the topology information indicating that each equipment having an interface whose information is stored in the pickup information storing unit in said pickup step, is connected to the identical subnetwork represented by the network address or a pair of the network address and the group ID within the information and that the equipment having a plurality of interfaces, of all the equipment each having an interface whose information is stored in the pickup information storing unit, connects together the subnetworks indicated by the network addresses of the interfaces owned by the equipment or each pair of the network address and group ID of an interface. 12. A computer readable memory storing a topology information automatic configuration program as set forth in claim 11, the topology information automatic configuration program further comprising: an additional registration step for, when there exists the information of an interface of the equipment which has a plurality of interfaces and whose information is not stored in the key address list, in the information of each interface stored in the pickup information storing unit, additionally storing a pair of the network address and the corresponding equipment name of the interface in the rearmost portion of the key address list storing unit, as for an interface including no group ID in the configuration information, of all the interfaces owned by the equipment, and additionally storing a set of the network address, the equipment name and the group ID of the interface in the key address list storing unit, as for an interface including the group ID in the configuration information; and a deleting step for deleting the information which has been stored in the pickup information storing unit from the information stored in the address list storing unit as well as deleting the same information as the head information from the information stored in the key address list storing unit, and thereafter performing said pickup step on condition that some information remains in the key address list storing unit. formation collected, and said specifying step comprises: a first step, in which a specific job is noticed in accordance with a predetermined rule; a second step, for repeating a process in which, when an execution start time of said noticed job is delayed from a planned start time of said job by more than a predetermined degree, then, a job executed just prior to the noticed job in said order is noticed; and a third step, in which, with regard to each noticed job, when an execution time of said job exceeds a planned execution time of said job by a predetermined degree, said job is extracted as the delay factor in processing said job net. 2. The method of specifying a delay factor according to claim 1, wherein: in said third step, when a certain job is extracted as the delay factor in processing said job net, a computer assigned to said job is further extracted as a delay factor in processing said job net. 3. The method of specifying a delay factor according to claim 1, wherein: said history information is information that can specify an execution end time at which a computer ended execution of the job; said definition information is information that can specify a planned end time, a planned time at which execution of each job is ended; said specifying step further comprises: a fourth step, in which, when the execution start time of the noticed job is delayed from the planned start time by more than the predetermined degree, and when an execution end time of a job whose execution end time is latest among jobs executed just prior to said noticed job is not delayed from a planned end time by more than a predetermined degree, an interval between the noticed job and the job executed just prior to said noticed job is extracted as a delay factor in processing said job net. 4. The method of specifying a delay factor according to claim 6, wherein in said fourth step, when an interval between a certain job and a job executed just prior to said job is extracted as a delay factor in processing said job net, and when a computer assigned to said job is different from a computer assigned to the job executed just prior to said job, a network between said computers is further extracted as a delay factor in processing said job net. 5. A method of specifying a delay factor, for analyzing a delay factor in processing a job net executed by a computer system having a plurality of computers, wherein said method comprises: a collecting step in which history information is collected from each computer assigned each of a series of jobs which are executed in a predetermined order and constitute said job net, said history information being information that can specify an execution start time at which said computer started execution of a job, an execution end time at which said computer ended the execution of the job, and an execution time which the computer required to execute the job, and a specifying step in which the delay factor in processing said job net is decided by comparing definition information, which is defined in advance and can specify a planned start time, a planned time at which execution of each job is started, a planned end time, a planned time at which execution of each job is ended, and a planned execution time, a planned time required for execution of each job, with the history information collected, and said specifying step comprises: a first step, in which a specific job is noticed in accordance with a predetermined rule; a second step, for repeating a process in which, among jobs executed just prior to the noticed job in said order, jobs whose execution end times stand within n-th (n: a natural number) from the latest are extracted and noticed; and a third step, in which, with regard to each noticed job, when an execution time of said job exceeds a planned execution time of said job by a predetermined degree, said job is extracted as the delay factor in processing said job net. 6. The meth od specifying a delay factor according to claim 5, wherein: in said second step, when an execution start time of the noticed job is not delayed from a planned start time by more than a predetermined degree, the process of extracting and noticing the jobs whose execution end times stand within n-th (n: a natural number) from the latest among the jobs executed just prior to said noticed job in said order is not performed. 7. The method of specifying a delay factor according to claim 5, wherein: in said third step, when a certain job is extracted as the delay factor in processing said job net, a computer assigned to said job is further extracted as a delay factor in processing said job net. 8. The method of specifying a delay factor according to claim 5, wherein: said specifying step further comprises: a fourth step, in which, when the execution start time of the noticed job is delayed from the planned start time by more than the predetermined degree, and when an execution end time of a job whose execution end time is latest among jobs executed just prior to said noticed job is not delayed from a planned end time by more than a predetermined degree, an interval between the noticed job and the job executed just prior to said noticed job is extracted as a delay factor in processing said job net. 9. The method of specifying a delay factor according to claim 8, wherein: in said fourth step, in a case where an interval between a certain job and a job executed just prior to said job is extracted as a delay factor in processing said job net, when a computer assigned to said job is different from a computer assigned to the job executed just prior to said job, a network between said computers is further extracted as a delay factor in processing said job net. 10. A method of specifying a delay factor, for specifying a delay factor in processing a job net executed by a computer system having a plurality of computers, wherein said method comprises: a collecting step in which history information is collected from each computer assigned each of a series of jobs which are executed in a predetermined order and constitute said job net, said history information expressing a history of executing a job which constitutes said job net and is assigned to said computer; a specifying step in which a job and a computer assigned to said job that became the delay factors in processing said job net are decided, on the basis of a form of delay in execution of each of said series of jobs constituting said job net, expressed by said history information collected, in relation to an execution schedule of each of said series of jobs constituting said job net, expressed in definition information defined in advance, and in accordance with computers assigned to each of said series of jobs; a computer utilization status acquiring step in which a resource utilization status owing to each process executed in said computer to which the job became the delay factor in processing said job net is assigned is acquired, from said computer; a process specifying step in which a process is specified as an execution form of the job that became the delay factor in processing said job net, on the computer to which said job is assigned, and a computer utilization status of said computer owing to the process of the job that became the delay factor in processing said job net is specified, among resource utilization statuses owing to respective processes acquired from the computer to which the job that became the delay factor in processing said job net is assigned; and a computer utilization status displaying step in which a resource utilization status of the computer to which the job that became the delay factor in processing said job net is assigned is displayed, owing to each process, acquired from said computer, distinguishing, at least, the resource utilization status of said computer owing to the process specified with respect to the job that became the delay factor in processing said job net. 11. The method of specifying a delay factor according to claim 10, wherein: in said process specifying step, it is further judged if the resource utilization status of the computer to which the job that became the delay factor in processing said job net is assigned, owing to each process, includes a resource utilization status corresponding to jobs other than the job that became the delay factor in processing said job net; and in said computer utilization status displaying step, when the resource utilization status of the computer to which the job that became the delay factor in processing said job net is assigned, owing to each process, includes a resource utilization status corresponding to jobs other than the job that became the delay factor in processing said job net, said definition information that is defined in advance for a job net including those jobs other than the job that became the delay factor, and expresses an execution schedule of each of a series of jobs constituting the job net in question, is further displayed. 12. The method of specifying a delay factor according to claim 10, wherein: said definition information is information that can specify, for each job of the series of jobs constituting said job net, an execution schedule, which indicates a computer assigned to said job and a planned start time of execution, and a name of executable file that is executed by said computer to realize the execution of said job; said resource utilization status of said computer owing to each process acquired from said computer is a resource utilization status of said computer for each executable file executed in said computer; and in said process specifying step, as information for specifying the process as the execution form of the job that became the delay factor in processing said job net, on the computer to which said job is assigned, a name of an executable file associated with said job by said definition information is acquired; and out of resource utilization statuses of the computer to which the job that became the delay factor in processing said job net is assigned, i.e., respective resource utilization statuses owing to executable files, acquired from said computer, a resource utilization status owing to the executable file of the job that became the delay factor in processing said job net is specified. 13. A method of specifying a delay factor, for specifying a delay factor in processing a job net executed by a computer system having a plurality of computers, wherein said method comprises: a collecting step in which history information is collected from each computer assigned each of a series of jobs-which are executed in a predetermined order and constitute said job net, said history information expressing a history of executing a job which constitutes said job net and is assigned to said computer; a specifying step in which a job and a computer assigned to said job that became the delay factors in processing said job net are decided, on the basis of a form of delay in execution of each of said series of jobs constituting said job net, expressed by said history information collected, in relation to an execution schedule of each of said series of jobs constituting said job net, expressed in definition information defined in advance, and in accordance with computers assigned to each of said series of jobs; a network specifying step in which a process is specified as an execution form of the job that became the delay factor in processing said job net, on the computer to which said job is assigned, and a part of the network to which a logical channel used by the specified process is set is specified; a traffic status collecting step in which a traffic status in the specified network is collected, for each logical channel set to said network; and a traffic status displaying step in which the traffic status collected for said each logical channel
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