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92 results about "Lost time" patented technology

Lost time is the term within traffic engineering for the time during which no vehicles are able to pass through an intersection despite the traffic signal displaying a green (go) signal. The total lost time is the sum of two separate elements: start-up lost time and clearance lost time.Start-up lost time happens when a traffic signal changes from red (stop) to green (go).

Access method for periodic contention-free sessions

An access method for periodic contention-free sessions (PCFS) reduces interference between overlapping first and second wireless LAN cells contending for the same medium. Each cell includes a respective plurality of member stations and an access point (AP) station. The access method for periodic contention-free sessions (PCFS) includes a fixed cycle time that reduces conflicts with PCFS from other cells. The PCFS from several cells are repeated in cycles of cycle period (CP), which is the contention-free period (CFP) of an access point times a factor that is a function of the number of overlapping cells. Periodic contention-free sessions (PCFSs) are generated, one from each overlapping cell. PCFS transmission attempts occur at the fixed specified time spacing following the start of the previous cycle. Each active AP sets a timer at CP and a PCFS is initiated when the timer expires. The timer is then reset to CP and this starts a new cycle. Contention transmissions are attempted by stations based on their assigned priority. If a channel is busy at the designated start time for transmitting a PCFS, the PCFS is shortened by the time lost. Interleaving PCFSs and CFSs reduces conflicts with CFSs from other cells. To lessen the contention between APs of different cells, each station's Network Allocation Vector (NAV) and Inter-BSS Network Allocation Vector (IBNAV) is updated by an increased value of the next CFS length, the increment being the inter-BSS contention period (IBCP). APs will attempt to access the channel during the IBCP only for transmitting a PCFS, while they will wait for the NAV and IBNAV expirations before attempting to transmit a CFS. Interleaving PCFSs and CFSs also enables maintaining quality of service (QoS).
Owner:AT&T INTPROP II L P

Access method for periodic contention-free sessions

An access method for periodic contention-free sessions (PCFS) reduces interference between overlapping first and second wireless LAN cells contending for the same medium. Each cell includes a respective plurality of member stations and an access point (AP) station. The access method for periodic contention-free sessions (PCFS) includes a fixed cycle time that reduces conflicts with PCFS from other cells. The PCFS from several cells are repeated in cycles of cycle period (CP), which is the contention-free period (CFP) of an access point times a factor that is a function of the number of overlapping cells. Periodic contention-free sessions (PCFSs) are generated, one from each overlapping cell. PCFS transmission attempts occur at the fixed specified time spacing following the start of the previous cycle. Each active AP sets a timer at CP and a PCFS is initiated when the timer expires. The timer is then reset to CP and this starts a new cycle. Contention transmissions are attempted by stations based on their assigned priority. If a channel is busy at the designated start time for transmitting a PCFS, the PCFS is shortened by the time lost. Interleaving PCFSs and CFSs reduces conflicts with CFSs from other cells. To lessen the contention between APs of different cells, each station's Network Allocation Vector (NAV) and Inter-BSS Network Allocation Vector (IBNAV) is updated by an increased value of the next CFS length, the increment being the inter-BSS contention period (IBCP). APs will attempt to access the channel during the IBCP only for transmitting a PCFS, while they will wait for the NAV and IBNAV expirations before attempting to transmit a CFS. Interleaving PCFSs and CFSs also enables maintaining quality of service (QoS).
Owner:AT&T INTPROP II L P

System and method for automatically analyzing and managing loss factors in test process of semiconductor integrated circuit devices

A system and method automatically analyzes and manages loss factor data of test processes in which a great number of IC devices are tested as a lot with a number of testers. The lot contains a predetermined number of identical IC devices, and the lot test process is performed sequentially according to a predetermined number of test cycles. The system include a means for verifying test results for each of the test cycles and for determining whether or not a re-test is to be performed and an IC device loading/unloading means for loading IC devices to be tested and contained in the lot to a test head and for unloading the tested IC devices from the test head by sorting the tested IC devices according to the test results. The system also includes raw data generating means for generating raw data on the basis of time data occurring when the test process is performed; data calculating means for calculating testing time data, index time data based on the raw data, and loss time data; data storage means for storing the raw data and the calculated data; and data analyzing and outputting means for analyzing the raw data and the calculated data according to the lots, the plurality of testers and the IC device loading/unloading means and for outputting the analyzed output through an user interface. The test system includes testers, a server system and terminal computer, and the server system is provided with data storage means for integrally manipulating time data generated by the testers according to lots and test cycles and for storing manipulated time data.
Owner:SAMSUNG ELECTRONICS CO LTD

Quick positioning method of satellite navigation receiver after recapture of lost lock

ActiveCN104678419ASolve the problem that it is not suitable for fast positioning of moving objectsSatellite radio beaconingClock rateAmbiguity
The invention discloses a quick positioning method of a satellite navigation receiver after the recapture of a lost lock. The quick positioning method comprises the following steps: recording a satellite lock losing time, participated positioning satellite number and ephemeris before the lock losing, and user location speed information and user clock correction clock rate information before the lock losing; after recapture, calculating user rough location by utilizing user location speed information at current time, lock-losing time and before the lock losing, and calculating satellite rough location by utilizing the current time; calculating pseudo-range by utilizing the user rough location and the satellite rough location and correcting a pseudo-range value by utilizing the user clock correction and the user clock rate; solving pseudo-range ambiguity of the whole milliseconds by utilizing pseudo-range value which is provided by a code tracking loop and is less than 1 millisecond and the calculated pseudo-range value to obtain a correct pseudo-range value and the satellite signal emission time to position. Positioning can be carried out by adopting the method to track, bit synchronization and vertical synchronization are not needed, and index of positioning in a condition that the lock is lost within 60 second and the lock is recaptured in 1 second is realized, and the problem that conventional positioning method is not suitable for quickly positioning a movable object is solved.
Owner:TIANJIN 764 COMM AIRMANSHIP

Method and system for eliminating time lost in initial stages of a web conference due to participants not being in-place on-time

A system for eliminating the time lost in initial stages of a Web conference due to participants not being in-place on-time is disclosed. The system enables automatic steps to be taken at the server to pull conference participants into a conference based on their acceptance of an invitation to the conference. A server system provides indications of confirmed conference participants to agent software on the client systems, and activates client side agents when the a conference is about to start. The Web conference server communicates relevant conference information to each client side agent. The agent launches the user's client side browser and automatically performs any other preliminary steps that are required to join the participant to the conference. The participant user may be presented with a user interface that enables them to either accept or reject the automatic login to the conference. If the user rejects the automatic login, then indication of this rejection is passed to the server. Other information passed from the client system to the server may include an indication that no response to the accept / reject prompt was received from the user, an indication that automatic login to the conference was attempted but failed for some specified reason, indication that the participant was automatically logged in to the conference but is not at their desk, that the participant's client system is not connected to the network, or that the participant is currently active in another application or activity on their client system.
Owner:IBM CORP

Automatic tracking method and system applied to space-based space target

ActiveCN103838258ASmall control torqueOvercome the effects of the tracking processControl using feedbackSpace objectSatellite
The invention provides an automatic tracking method and system applied to a space-based space target. The method includes the steps that an image including the space target needed to be tracked is collected; whether an automatic tracking task is executed for the first time or not is judged; if yes, the space target is detected and tracked, and a current second miss distance of the space target is calculated; if not, whether a tracking step executed in the process of automatic tracking is executed previously or not is judged; if yes, whether the number of continuous-losing times of space object tracking exceeds a preset threshold value of the number of losing times of space object tracking or not is judged, and if yes, the space object is detected again; if not, tracking is executed, and a current second miss distance of the space object is calculated; if the tracking step is not executed, the space object is detected again. The influences on the tracking process by a satellite dynamic base are eliminated, the requirement for automatically capturing and tracking the space object is met, when the target is located in a view field, the tracking state can be captured at once without forecasting the priori knowledge of the target through the ground, the method is reliable, miss distance calculation is precise, and the space-based tracking requirement is met.
Owner:SHANGHAI ENG CENT FOR MICROSATELLITES

Method for achieving information transmission of vehicle-mounted cloud service terminal of commercial vehicle in layering communication mode

ActiveCN104618479ASmooth uploadAvoid situations where time period information is lostProgram controlTransmissionSignal qualityInformation transmission
The invention relates to a method for achieving information transmission of a vehicle-mounted cloud service terminal of a commercial vehicle in a layering communication mode. The method for achieving the information transmission of the vehicle-mounted cloud service terminal of the commercial vehicle in the layering communication mode includes: classifying various information collected by the vehicle-mounted cloud service terminal of the commercial vehicle according to basic functions and industry application characteristics, generating corresponding information lists, setting different priority levels for all the information lists, and uploading the information lists into a cloud server according to the different priority levels. According to the method for achieving the information transmission of the vehicle-mounted cloud service terminal of the commercial vehicle in the layering communication mode, the circumstances that information transmission is blocked and data is lost, caused by poor quality of communication network signals, are effectively avoided, and therefore the effects that good stability and reliability of the information transmission of the vehicle-mounted cloud service terminal are kept, vehicle information can be smoothly uploaded, and the circumstance that time segment information is lost is prevented from occurring are guaranteed under the circumstances that the commercial vehicle is located in different areas and communication quality is irregular due to different network modes.
Owner:SHENZHEN BUGUNIAO TECH CO LTD
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