초록 ▼

A diagnostic system for use in a process control system collects and stores in a database information pertaining to the operation of the process control system, and that uses an expert engine to apply rules for analysis to the information in the database to determine solutions to problems. The datab

A diagnostic system for use in a process control system collects and stores in a database information pertaining to the operation of the process control system, and that uses an expert engine to apply rules for analysis to the information in the database to determine solutions to problems. The database stores various types of information such as event and alarm data, notices of scheduled maintenance and changes to operating parameters, and historical data related to previous changes to the process control system that are relevant to determining both the source of the problems detected in the process control system and the steps necessary to either further analyze or correct the detected problems. The diagnostic system identifies the source of the problem and identifies and runs the appropriate analytical tools or takes remedial measures based on the rules for analysis for the expert engine.

대표청구항 ▼

A diagnostic system for use in a process control system collects and stores in a database information pertaining to the operation of the process control system, and that uses an expert engine to apply rules for analysis to the information in the database to determine solutions to problems. The datab

A diagnostic system for use in a process control system collects and stores in a database information pertaining to the operation of the process control system, and that uses an expert engine to apply rules for analysis to the information in the database to determine solutions to problems. The database stores various types of information such as event and alarm data, notices of scheduled maintenance and changes to operating parameters, and historical data related to previous changes to the process control system that are relevant to determining both the source of the problems detected in the process control system and the steps necessary to either further analyze or correct the detected problems. The diagnostic system identifies the source of the problem and identifies and runs the appropriate analytical tools or takes remedial measures based on the rules for analysis for the expert engine. ing a significant portion of the defibrillation shock field to the heart itself. As a result, defibrillation shocks are less likely to activate extracardiac muscle(s) and/or nerve tissue(s) within the surrounding chest. Application of the shocks is thus less painful to the patient. HMP with the Handoff Core Server; obtaining a registration response from the Handoff Core Server; and if the registration response is successful, periodically refreshing the selected HMP's registration with the Handoff Core Server. 2. A method of enabling seamless user mobility in a short-range wireless networking environment comprising the steps of: providing one or more portable client devices, each of the client devices equipped with a short-range wireless communications capability for communicating in the short-range wireless networking environment; providing a plurality of Handoff Management Points (HMPs), each of the HMPs equipped with a short-range wireless link for communication with the client devices and a link to a networking environment wherein one or more application programs residing on one or more application servers can be accessed; providing a Handoff Core Server to the manage the HMPs, wherein the Handoff Core Server maintains a record of a current location of each client device; receiving at least one of (1) traffic generated by a particular client device and (2) traffic destined for a particular client device at the Handoff Core Server; and filtering the received traffic, by the Handoff Core Server, according to one or more of: (1) a destination of the traffic (2) a current location of the particular client device; and (3) an identity of a user of the particular client device. 3. A method of enabling seamless user mobility in a short-range wireless networking environment comprising the steps of: providing one or more portable client device each of the client devices equipped with a short-range wireless communications capability for communicating in the short-range wireless networking environment; providing a plurality of Handoff Management Points (HMPs), each of the HMPs equipped with a short-range wireless link for communication with the client devices and a link to a networking environment wherein one or more application programs residing on one or more application servers can be accessed; providing a Handoff Core Server to manage the HMPs; detecting, by a particular HMP, an establishment of a new communication channel with a selected client device; issuing a channel establishment notification to the Handoff Core Server, responsive to the detecting step; and updating, by the Handoff Core Server, an Active User Location (AUL) Registry, responsive to receiving the channel establishment notification. 4. The method according to claim 3, wherein the establishment is an explicit establishment. 5. The method according to claim 3, wherein the establishment is an implicit establishment. 6. The method according to claim 3, further comprising the steps of: detecting, by the particular HMP, a termination of an existing communication channel with a particular client device; issuing a channel termination notification to the Handoff Core Server, responsive to the step of detecting the termination; and updating, by the Handoff Core Server, the AUL Registry, responsive to receiving the channel termination notification. 7. The method according to claim 6, wherein the termination is an explicit termination. 8. The method according to claim 6, wherein the termination is an implicit termination. 9. A system for enabling seamless user mobility in a wireless networking environment, comprising: one or more portable user devices, each equipped with a short-range wireless communications capability for communicating in the wireless networking environment; one or more application programs residing on one or more application servers; a plurality of Handoff Management Points (HMPs), each equipped with a wireless link for communication with the user devices and a link to a networking environment wherein the application programs and application servers reside; a Handoff Core Server (HCS) to manage the HMPs; means for dynamically registering each HMP with the HCS as the HMP becomes operational, where in an installation and configuration of the operational HMP requires no incremental intervention by a human; means for making a selected user device known to a first HMP when the selected user device comes into communication range with the first HMP; means for handing the selected user device off from the fix HMP to a second HMP when the selected user device leaves the communication range of the first HMP and enters communication range of the second HMP; and means for maintaining, during and after the handing off, any on-going session that may be operating between the selected user device and one or more of the application programs. 10. The system according to claim 9, wherein the means for maintaining further comprises: means for assigning an Internet Protocol (IP) address to the selected user device when the selected user device is in the communication range of the first HMP; and means for continuing to use the IP address for the selected user device when the selected user device is in the communication range of the second HMP. 11. The system according to claim 10, wherein the means for assigning further comprises means for storing the IP address for the selected user device at the HCS, and wherein the means for continuing to use further comprises means for retrieving the stored IP address from the HCS. 12. The system according to claim 9, further comprising means for re-registering each dynamically registered HMP after expiration of a particular period of time. 13. Computer program instructions embodied on one or more computer readable media, the computer program instructions being adapted for causing a computer system to generate executable code for a computer program, the computer program enabling seamless user mobility in a wireless networking environment, the computer program instructions comprising: computer program instructions for dynamically registering a plurality of Handoff Management Points (HMPs) with a Handoff Core Server (HCS) as the HMP becomes operational, wherein each HMP is equipped with a wireless link for communication with a plurality of user devices and a link to a networking environment wherein a plurality of application programs and application servers reside, wherein each of the user devices being is equipped with a short-range wireless communications capability for communicating in the wireless networking environment, and wherein an installation and configuration of the operational HMP requires no incremental intervention by a human; computer program instructions for causing thee HCS to manage the HMPs; computer program instructions for making a selected user device known to a first HMP when the selected user device comes into communication range with the first HMP; computer program instructions for handing the selected user device off from the first HMP to a second HMP when the selected user device leaves the communication range of the first HMP and enters communication range of the second HMP; and computer program instructions for maintaining, during and after the handing off, any on-going session that may be operating between the selected user device and one or more of the application programs. 14. The computer program instructions according to claim 13, wherein the computer program instructions for maintaining further comprise: computer program instructions for assigning an Internet Protocol (IP) address to the selected user device when the selected user device is in the communication range of the first HMP; and computer program instructions for continuing to use the IP address for the selected user device when the selected user device is in the communication range of the second HMP. 15. The computer program instructions according to claim 14, wherein the computer program instructions for assigning further comprises computer program instructions for storing the IP address for the selected user device at the HCS, and wherein the computer program instructions for continu ing to use further comprises computer program instructions for retrieving the stored IP address from the HCS. 16. The computer program instructions according to claim 13, further comprising computer program instructions for re-registering each dynamically registered HMP after expiration of a particular period of time. 17. A system for enabling seamless user mobility in a short-range wireless networking environment, comprising: one or more portable client devices, each of the client devices equipped with a short-range wireless communications capability for communicating in the short-range wireless networking environment; a plurality of Handoff Management Points (HMPs), each of the HMPs equipped with a short-range wireless link for communication with the client devices and a link to a networking environment wherein one or more application programs residing on one or more application servers can be accessed; Handoff Core Server to manage the HMPs; means for dynamically making a selected one of the HMPs operational, further comprising: means for obtaining an Internet Protocol (IP) address for the selected HMP; means for discovering, by the selected HMP, an identity of the Handoff Core Server; and means for initiating, by the selected HMP, an HMP presence protocol exchange with the Handoff Core Server, further comprising means for sending a registration request to the Handoff Core Server to register the selected HMP with the Handoff Core Server; means for obtaining a registration response from the Handoff Core Server; and means for periodically refreshing the selected HMP's registration with the Handoff Core Server if the registration response is successful. 18. A system for enabling seamless user mobility in a short-range wireless networking environment, comprising: one or more portable client devices, each of the client devices equipped with a short-range wireless communications capability for communicating in the short-rage wireless networking environment; a plurality of Handoff Management Points (HMPs), each of the HMPs equipped with a short-range wireless link for communication with the client devices and a link to a networking environment wherein one or more application programs residing on one or more application servers can be accessed; a Handoff Core Server to manage the HMPs, wherein the Handoff Core Server maintains a record of a current location of each client device; means for receiving at least one of (1) traffic generated by a particular client device and (2) traffic destined for a particular client device at the Handoff Core Server; and means for filtering the received traffic, by the Handoff Core Server, according to one or more of: (1) a destination of the traffic; (2) a current location of the particular client device; and (3) an identity of a user of the particular client device. 19. A system for enabling seamless user mobility in a short-range wireless networking environment, comprising: one or more portable client devices, each of the client devices equipped with a short-range wireless communications capability for communicating in the short-range wireless networking environment; a plurality of Handoff Management Points (HMPs), each of the HMPs equipped with a short-range wireless link for communication with the client devices and a link to a networking environment wherein one or more application programs residing on one or more application servers can be accessed; a Handoff Core Server to manage the HMPs; means for detecting, by a particular HMP, an establishment of a new communication channel with a selected client device; means for issuing a channel establishment notification to the Handoff Core Server, responsive to the means for detecting; and means for updating, by the Handoff Core Server, an Active User Location (AUL) Registry, responsive to receiving the channel establishment notification. 20. The system according to claim 19, wherein the establishment is an explicit e