36 results about "Handover algorithms" patented technology

A method and apparatus for ensuring application of quality of service requirements on an access network. The method includes comparing, in a mobile communication device, one or more application signaling requirements of a selected application with one or more link characteristics of a link between the mobile communication device and an access node of an access network. Based on the comparison, the method further includes selecting at least one of: signaling, in the mobile communications device, to a handover algorithm to indicate that a handover to another access node is desired if it is determined that the application signaling requirements cannot be met by the link; and determining, in the mobile communication device, one or more transmission characteristics for the selected application based on the one or more application signaling requirements and the one or more link characteristics, and transmitting a signal from the mobile communication device to the access node for the selected application using the determined one or more transmission characteristics if it is determined that the application signaling requirements can be met by the link.

A method is used for detecting the environment of a vehicle and utilizes a number of sensors, the sensors having different detection ranges, and a transition of an object between two detection ranges is bridged by prediction by using a handover algorithm.

The invention relates to applying a handover algorithm in a mobile terminal. In the method, the state of a user interface component of the terminal is checked, and the handover algorithm is applied on the basis of the current state of the user interface component. The handover algorithm is applied only if the current state of the user interface component is active.

The present invention discloses a method and device for optimally selecting a primary carrier in a multi-carrier mixed configuration mode, which is used to solve the problem that the existing RRM handover algorithm does not take into account the multi-carrier mixed working mode, resulting in that the reselection or handover cannot be performed according to the UE's The problem of selecting the optimal target primary serving cell for multi-carrier capability. During reselection or handover in the present invention, the candidate target cell whose multi-carrier capability dimension of the cell is greater than or equal to the UE multi-carrier capability dimension is preferentially selected as the final target primary serving cell of the UE, and the multi-carrier capability dimension of the cell is greater than or equal to the UE multi-carrier capability Among the candidate target cells in the dimension, the cell that is in the same primary carrier plane as the current UE is further preferentially selected as the final target primary serving cell of the UE, so as to optimize the selection of the primary carrier that is conducive to the multi-carrier capability of the UE and give full play to the multi-carrier of the UE. Function.

The invention discloses a high-precision pan-tilt control and implementation method based on subdivision driving, and particularly relates to the technical field of pan-tilt control. An address and acommunication rate of a pan-tilt are configured through a system parameter configuration unit according to selection of a dial switch, and then, a universal PelcoD protocol is received through an RS485 communication unit to control the pan-tilt. According to the high-precision pan-tilt control and implementation method based on subdivision driving, through cooperation of the embedded micro-controlunit, the RS485 communication unit, the system parameter configuration unit and the stepping motor subdivision driving unit, subdivision driving of a stepping motor is adopted to achieve driving of the motor; and through the acceleration and deceleration algorithm of the motor and the switching algorithm of the subdivision data in the movement process of the motor, high-precision and stable control over the pan-tilt is achieved, and the requirements of the pan-tilt for the precision and stability of the pan-tilt in a special application scene are greatly improved.

The invention discloses a multi-mode registration center architecture switching method in a mobile environment, and aims to provide a method capable of realizing flexible switching of single-center, multi-center and non-center multi-mode architectures. According to the technical scheme, a multi-mode registration center switching engine serves as an operation carrier for framework control of the whole registration center, and a multi-mode registration center switching algorithm is adopted to periodically monitor a platform of a whole network domain and the load service state of a carried sensor; a gravity center method is adopted to select a multi-mode center platform, then sensor multi-mode service registration in a specific mode is carried out for the selected mode and the center platform, and a display control unit is responsible for registration center mode and center list input of a manual mode; and the multi-mode registration center realizes automatic multi-mode registration center architecture switching according to the sensed network environment, the service condition deployed by the mobile platforms, the distance between the mobile platforms, the communication quality and the like.

The invention discloses a same-frequency switching method and device for an endangered electric quantity terminal, and the method is applied to a base station, and comprises the steps: receiving an endangered electric quantity alarm signal reported by a terminal; according to a measurement report reported by the terminal, judging whether the uplink signal-to-noise ratio of the terminal is not less than a signal-to-noise ratio threshold value and whether the moving speed of the terminal is not greater than a speed threshold value; if yes, amplifying the current same-frequency switching hysteresis value to obtain a same-frequency switching hysteresis value of the endangered electric quantity mode; based on the same-frequency switching hysteresis value of the endangered electric quantity mode, issuing a measurement control instruction to the terminal, so that the terminal detects whether a first event A3 is triggered or not according to the same-frequency switching hysteresis value of the endangered electric quantity mode; and receiving a first event A3 reported by the terminal, and completing cell switching processing of the terminal according to the first event A3. According to the mode, the common-frequency switching algorithm of the endangered electric quantity mode is obtained by modifying the normal common-frequency switching algorithm, and the residence time of the endangered electric quantity terminal in the service cell can be prolonged.

The invention discloses an attitude control shift handover method and system during mid-terminal guidance shift handover. According to the invention, research is carried out based on attitude control shift handover problems caused by different guidance instructions under different mid-terminal guidance systems; and corresponding control strategies and control parameters are completely different due to the fact that the guidance instructions are different and control types corresponding to controlled objects are different, so that when switching is carried out between the guidance instructions, it is possible to cause jumping of a control instruction and a violent change of missile body attitude, and for a strapdown seeker with a small field of view, it is likely to cause target lock losing. Therefore, the invention designs an attitude control shift handover algorithm for the situation to ensure stable transition of the missile body attitude during the mid-terminal guidance shift handover.

The invention belongs to the technical field of low-orbit satellite mobile communication mobility management, and particularly discloses a fast RACH-free switching method based on resource reservation, an access network and a switching system. The switching system comprises a satellite, a terminal and the access network, the access network receives measurement information of the terminal, and after the access network determines a target beam, the source beam burst type and the time-frequency resource of the terminal are inquired according to the ID of the terminal, a controller RRC layer of the access network applies for the same burst type from a wireless resource management module, the RRC layer receives a request success instruction, the RRC layer judges whether to be cross-satellite switching, and the access network judges whether to start an intra-satellite or inter-satellite RACH-free switching algorithm switch or not and controls whether to execute RACH switching or not. By adopting the technical scheme, the burst configuration resources are reserved in advance, and non-perception rapid RACH-free switching of the terminal is realized.

The invention discloses a high-speed railway 5G-R wireless communication algorithm based on a rapid switching model, and aims to solve the problem that the key technology of wireless communication needs to be innovated continuously along with flourishing development of high-speed railways, especially the problem of low-delay switching of the fifth generation (5G) in a rapid moving scene causes wide attention. On the basis of analyzing a large amount of actually measured data and the position of user equipment (UE), the invention provides a rapid switching algorithm to solve the problem of long delay of a 5G-R railway high-speed train, by calculating the running speed and direction of the train, selecting a reasonable switching mode and identifying a switching chain of an adjacent cell, the position of the train can be calculated to determine whether UE enters a defined pre-handover identification area, according to values collected in a measurement report, when the weight of a target cell is larger than that of a source cell, a handover command is triggered, and the algorithm has important guiding significance on the design of a 5G-R wireless network, construction of a base station and improvement of communication performance.

The invention requests to protect a network selection method based on a matching game in a security risk network. The method aims at solving the problem that user information is illegally stolen due to the fact that most of current vertical switching algorithms do not consider network access point safety and user safety requirements. The main idea of the method is as follows: firstly, sensing the historical internet surfing behavior of a user, and evaluating the security demand of the user; secondly, evaluating the security of the network access point through a decision tree algorithm; respectively designing satisfaction functions of the network side and the user side, and establishing satisfaction ranking value matrixes of the two sides; and finally, matching the user and the network through a matching game method. Simulation experiments show that the method can provide higher user satisfaction, and the total throughput of the system is not obviously reduced compared with other algorithms.