34results about How to "Shorten handover time" patented technology

A method of associating a mobile station to a base station in a wireless communication system comprises transmitting to a serving base station a scanning request message comprising an association indicator. The method also comprises receiving from the serving base station a scanning response message comprising a rendezvous time associated with a neighboring base station for initiating ranging with the neighboring base station, wherein the serving base station communicates an association notification to the neighboring base station, the association notification comprising the rendezvous time. The method also comprises associating with the neighboring base neighboring base station by transmitting a ranging request after passing of the rendezvous time determined from a transmission time of the scanning response message from the neighboring base station, wherein the rendezvous time is associated with a time the neighboring base station is expected to provide a non-contention based ranging opportunity for the mobile station.

In accordance with a movement detection method, a mobile terminal in moving among access router devices all set at the same frequency, stores the link layer address of the currently reachable access router device. When receiving a Layer 2 frame from a new access router device, the mobile terminal issues a trigger for requesting to implement a part of IP handover processing. By so doing, it allows IP handover processing to be initiated at higher speed than in the case of the conventional IP layer, thus enabling to reduce the total time of handover processing.

A method of triggering handoff of a mobile station to a candidate BSS, for VoWLAN communication, uses a roaming controller for monitoring link qualities of the serving and candidate BSS by selective/controlled fast scanning through RSSI screening at each packet reception. Using link qualities, a list of candidate BSSs for handoff is maintained. The controller selects a candidate BSS for handoff and completes pre-authentication of the mobile station with the selected best candidate BSS. When the link quality of the of the selected candidate BSS becomes better than that of the serving BSS, handoff is triggered. Link qualities may be monitored by screening a metric other than RSSI. When no candidate BSS is found, scanning is reduced/temporarily interrupted, to conserve power. When the serving BSS link quality is above a given threshold when the mobile station is in the serving BSS center, the functions of fast scanning and pre-authentication are interrupted.

A method, a system and a device for network handover are provided, which are applied to the field of communications technologies. The method includes the following steps that: a terminal first obtains information of a handover manner of handover from a virtual base station to a target base station, and then sends a corresponding message to the virtual base station according to the information of the handover manner, so as to perform network handover, so that in a procedure that the terminal is handed over from a non-WiMAX network to a WiMAX network, the terminal may be directly handed over according to the handover manner supported by the virtual base station. Compared with the conventional art in which handover manners require handover attempts, the adoption of the method for network handover reduces handover time and increases network handover efficiency.

A handover method of a mobile terminal device in a wireless local area network (WLAN) includes a mobile terminal device and at least two wireless access points (APs) which communicate with the mobile terminal device using particular radio resources. The mobile terminal device communicates with a wireless AP via a first radio resource, and receives signals from wireless APs via a second radio resource. The mobile terminal device arranges and stores the signals received from the wireless APs in a certain order of size. The mobile terminal device determines an AP for the handover by sequentially searching the stored APs when intensity of the signal received via the first radio resource is smaller than a predetermined value.

The present invention provides a wireless local area network handover method based on fuzzy rules, the method comprises: the mobile station

S1: receives the beacon frames sent in predefined time interval from the current associated access point and the adjacent access point during a preset time period, obtains and stores signal strength of two access points through beacon frames;

S2: performs fuzzy processing to the value of signal strength of the current access point and the adjacent access point and the change rate of signal strength respectively, then obtains fuzzy data characterizing levels of signal strength and the change rate of signal strength;

S3: performs fuzzy reasoning taking the fuzzy data as the input according to a preset fuzzy rules, obtains a reasoning output variables which contain handover modes of the mobile station, and determine the target access point according to the reasoning outputs;

S4: the mobile station authenticates with the target access point;

S5: the mobile station sends the re-association request frame to the target access point after passing through the authentication; the handover is completed when the establishment of the re-association is finished after the mobile station receives the re-association response frame.

According to the method of the present invention, the mobile station can automatically adjust the handover mechanism according to signal strength of the current access point and the adjacent point and change rate of signal strength and the better handover performance can therefore be achieved.

The invention discloses a silicon chip fast handing over device which is used for delivering silicon chips among a pre-alignment unit, a chip storehouse unit, a lower sheet buffer-storing platform and a workpiece platform. The silicon chip fast handing over device comprises a silicon chip transmission manipulator and a silicon chip handing-over mechanism. The silicon chip handing over mechanism comprises a plurality of rotary sleeves and a plurality of sheet forks; the rotary centers of the plurality of rotary sleeves are the same and the rotary sleeves are arranged by nesting; the top of each rotary sleeve is connected to one sheet fork for absorbing the silicon chip; each of the plurality of the sleeves can rotate around the rotation center; the sheet fork is of an U shape and the distance between the two edges of the sheet fork is greater than a maximum distance between silicon sheet absorption thimbles on the pre-alignment unit, the lower sheet buffer-storing platform and the workpiece platform. Compared with the prior art, the silicon sheet fast handing over device only rotates in the handing over process, and the sheet forks performs multi-point absorption, which guarantees high precision transmission and repeatability of the silicon chip. The single handing over sheet fork in the silicon sheet handing over mechanism can perform single movement, can realize a parallel movement through flow control, reduces handing over time and improves yield.

The invention belongs to the technical field of production of heating-free direct rolling of square and round billets, and relates to a control system for producing directly rolled casting billets anda control method thereof. The device comprises a casting billet shearing system, a sheared roller way, a conveying roller way, a billet discharging roller way, a converging roller way, a casting billet transverse moving device, a casting billet temperature measuring device, a control system, a secondary cooling water pipeline, a flow regulating valve and a nozzle. According to the control systemand the control method, whether the temperature of the casting billets meets the requirement of direct rolling on the temperature of the casting billets can be judged in time, and when the temperatureof the casting billets meets the requirement, a roller way is started to rapidly send the casting billets to steel rolling for rolling; when the temperature of the casting billets cannot meet the requirement of the direct rolling temperature, back-zone equipment is started, the casting billets are hoisted to be offline, and the secondary cooling water amount is adjusted according to factors suchas the measured temperature, the secondary cooling water inlet temperature, the molten steel superheat degree, and the historical effective casting speed of the casting billets in the secondary cooling spraying section to adjust the temperature of the casting billets to meet the requirement of the direct rolling.

The present invention provides an automatic cleaning device and method for a measurement cavity of a coal ash content detector. The automatic cleaning device comprises a fixed base, a movable support, a cleaning tool, and a control module. The mobile support is slidably embedded in a moving slide way of the fixed base, and may be driven by a support driving motor to slide horizontally and move up and down at the same time. The support driving motor is connected to and controlled by the control module. The cleaning method comprises detecting whether the measurement cavity is in a sample discharge state, putting the cleaning tool into the measurement cavity, driving by the support driving motor a vertical telescopic rod to put the cleaning tool in cleaning motion on the inner wall of the measurement cavity, and taking the cleaning tool out of the measurement cavity. The automatic cleaning device of the present invention is reasonable in structure and high in cleaning speed, thus greatly saving the cleaning time, good in cleaning effect, thus avoiding the case of blockage of the measurement cavity by residual waste samples and ensuring normal production progress, high in cleaning efficiency, prone to determine the degree of cleanliness and the termination of cleaning, and broad in application prospect.

The present invention relates to an access control method and device in a wireless power transmission system. A wireless power transmission device comprises: a power conversion circuit configured to have a plurality of primary coils and transmit wireless power to a wireless power reception device by using the primary coil which has formed magnetic coupling to the wireless power reception device at an operating frequency; and a communication/control circuit configured to perform in-band communication with the wireless power reception device by using the operating frequency and perform out-band communication with the wireless power reception device by using a frequency other than the operating frequency, wherein the communication/control circuit can transmit information for notifying whether or not connection to the wireless power reception device is possible by using the out-band communication.

The invention discloses a storage vehicle for a surgery. The storage vehicle for the surgery comprises a housing, an upper cover plate, a first storage chamber, a second storage chamber and a storageplate. The upper end of the housing is hinged with the upper cover plate. The left end of the inner side of the upper cover plate is connected with the inner wall of the housing through an electric telescopic rod B. The upper cover plate is internally provided with an ultraviolet lamp. The inner wall of the left side of the housing is fixedly connected with a support plate. The support plate is symmetrically hinged with a support rod A and a support rod B. The storage vehicle for the surgery is simple in structure, and capable of identifying a patient and conveniently storing articles of the patient, avoiding phenomena that the articles are lost or taken by mistake, effectively guaranteeing that the interior of the storage vehicle for the surgery is always positioned in an aseptic condition through an installed germicidal lamp; and conveniently taking by medical staff through an installed placing groove which can be retracted or stretched out of the housing, reducing handover time of anurse to surgical instruments, improving working efficiency, and enabling the articles to be always positioned in irradiation of the ultraviolet lamp in a handover process, thereby improving safety.

The invention discloses a coating glue solution for decorative paper and a preparation method of the coating glue solution, belongs to the technical field of decorative paper production and aims to solve the problem that existing coating glue cannot improve the opacity of body paper. The coating glue solution is composed of melamine glue and a titanium white solution according to the weight part ratio of 1:(0.1-0.2), wherein the titanium white solution comprises, by weight, 45-55 parts of water, 45-55 parts of titanium dioxide, 3-5 parts of dispersing agent, 0.5-1.2 parts of wetting agent and2.5-5 parts of acrylic resin. According to the preparation method, through mixing of the titanium white solution and the melamine glue in cooperation with the dispersing agent and the wetting agent, the milk-white coating glue solution is obtained; and when the surface of the body paper is coated with the titanium dioxide, the whiteness and opacity of the body paper are improved, so that the decorative white paper with qualified opacity is obtained.

The invention provides a high-capacity full-automatic sample handover method. The method comprises the following steps that an operator places a sample test tube rack in a sample receiving layer, a carrier rack leading-in mechanism conveys the sample test tube rack to a refrigeration module for storage, during identification, the sample test tube rack is conveyed to a sample identification layer,a gripper mechanism grips sample test tubes to an identification area for identification, and according to the identification result, the sample test tubes are placed on a classification test tube rack and conveyed to the refrigeration module to be classified and stored. The invention also provides a large-capacity full-automatic sample handover system for realizing the method. According to the high-capacity full-automatic sample handover method and handover system, a large number of samples can be quickly handed over outside a department and conveyed to the refrigeration module to be stored,then the samples are automatically scanned, recognized, classified and stored by corresponding mechanisms, the handover time of the high-capacity samples can be shortened, the workload of workers is reduced, the intelligent level of sample handover processing is improved, and the handover work efficiency is improved.