615 results about "Ping pong" patented technology

A method for managing mobility of a terminal in a heterogeneous network environment is provided. According to an aspect, there is provided an operation method of a terminal receiving parameters for Coordinated Multi-point transmission/reception (CoMP) operation in a heterogeneous network environment, the operation method including, at the terminal, receiving at least one parameter among a CoMP operation mode parameter, a time information parameter regarding a time at which the CoMP operation starts, a point information parameter about points that participate in the CoMP operation, and a CoMP operation parameter, from a base station, through a layer-3 message. Therefore, it is possible to avoid an unnecessary ping-pong handover and efficiently provide service continuity.

A half-transmittance photodiode usable as a photodetector in receivers for "ping-pong transmission" is improved in temperature characteristic, so that a half-transmittance photodiode usable at low temperatures is available. A p-n junction is formed in a buffer layer, not in an absorption layer.

The invention discloses a user selection switching method based on a moving load balancing mechanism, mainly solving the problems of interrupted communication or Ping-Pong switching caused by rapidly descensive signal quality easily appearing in the prior method under the circumstance that a user moves at high speed. The user selection switching method has the specific process that a source base station detects the load condition of a cell and decides whether the load balancing mechanism is started or not; the source base station and an adjacent base station exchange load information by an X2 interface and determine an objective cell to which the load is transferred according to the obtained load information of the cell and an adjacent cell; the source base station and an objective base station consult to update respective switching parameter; the source base station makes the reselection on users satisfying switching toggle conditions after the switching parameters are altered so as to determine non real-time service users moving in the manner of deviating from the direction of the base station as final users to be switched; and the users to be switched are switched to the objective cell so as to realize the intra-cell load balancing. The invention greatly increases the probability of normal conversation after the switching is finished, ensures the continuity of user service and improves the user service quality and the system performance and is used for the moving load balancing mechanism of the next-generation mobile communication system.

The invention discloses a vertical switching method based on dynamic weight optimization in a heterogeneous wireless network. Aiming at the problems that the mobility of terminals and the time-varying characteristics of network states lead to dynamic performance, different service types have personalized requirements for networks, and poor vertical switching performance is caused, performance optimization is carried out from the following aspects: firstly, separately calculating subjective weights and objective weights of network parameters by using an analytic hierarchy process (AHP) and an entropy evaluation method, and initializing the combined weights based on a linear single objective optimization (SOP) theory; secondly, introducing weight adjustment factors, and dynamically adjusting the weight of each network parameter to adapt to the dynamic change performance of network conditions; and finally, selecting an optimum access network by adopting utility functions with adjustable switching thresholds based on the personalized requirements of a terminal. Experimental results show that by adopting the vertical switching method disclosed by the invention, the switching blocking rate and call drop rate of the terminal can be effectively reduced, unnecessary switching can be reduced, 'ping-pong effects' can be reduced, and the comprehensive performance of vertical switching can be improved.

The invention discloses a method and a device capable of judging whether a terminal is switched between two wireless networks. The method comprises the following steps: judging whether the signal intensity of a first wireless network on the position of the terminal which is accessed to the first wireless network satisfies a first switching condition, if does not satisfy, judging not to switch; otherwise, judging whether the switching times in a first period satisfy a second switching condition, if does not satisfy, judging not to switch, and otherwise judging the terminal to be switched. The invention further discloses a method capable of judging whether the terminal is switched from the second wireless network to the first wireless network, and the device capable of judging whether the terminal is switched between the two networks. The signal strength is used as a first condition to judge whether the terminal is switched between networks, when the switching conditions are satisfied, the switching times in unit time are used for deciding whether to be switched, so that the ping-pong switching phenomena between different networks are reduced, and energy consumption and network source cost brought by the terminal are reduced.

Efficient design to implement LDPC decoder. The efficient design presented herein provides for a solution that is much easier, smaller, and has less complexity than other possible solutions. The use of a ping-pong memory structure (or pseudo-dual port memory structure) in conjunction with a metric generator near the decoder's front end allows parallel bit/check node processing. An intelligently operating barrel shifter operates with a message passing memory that is operable to store updated edges messages with respect to check nodes as well as updated edges messages with respect to bit nodes. Using an efficient addressing scheme allows the same memory structure to store the two types of edges messages with respect to bit nodes: (1) corresponding to information bits and (2) corresponding to parity bits. In addition, an intelligently designed hardware macro block may be instantiated a number of times into the decoder design to support ever greater design efficiency.

A table tennis ball service machine includes a ball-collecting unit, a control valve and a ball service mechanism. The ball-collecting unit has a ball-collecting groove connected with ping pong table and having its rear side provided with a blocking net and its lower side connected with a ball-collecting tube and a ball-feeding tube. The control valve is positioned at the lower end of the ball-collecting tube for controlling dropping of balls. The ball service mechanism connected with the upper side of the ball-feeding tube includes a ball service tube, a blower, a support frame, a universal joint, a cam and a motor. The ball serving tube has its outer end extending through the blocking net and formed with an outlet and its rear side formed with an inlet communicating with the ball-feeding tube. Thus, the ball serving speed and the angle can be controlled.

For each access point in a first network of a first type, a mobile device identifies a frame error rate of communications. The frame error rate is measured while simultaneously communicating with a second network of a second type. The mobile device stores the frame error rate in association with an access point identifier of the access point. Upon encountering, the first network again, the mobile device prioritizes the selection of an access point based on a ranking of the access points according to their associated frame error rates from lowest to highest. Further, the mobile device may use adjusted hysteresis parameters for making a handover decision in order to reduce a “ping-pong” selection between access points. Additionally or alternatively, the mobile device may select or suggest a channel of the access point based on a signal strength of signals from the second network.

The invention discloses a cell reselection method and a cell reselection terminal, which can be used for controlling the cell selection of a terminal which can support a first wireless access technical network and a second wireless access technical network and is resided in a cell of the first network currently. In the invention, the method comprises the steps following that: the terminal determines a target cell, wherein the target cell is a cell of the second wireless access technical network; the terminal acquires cell residence parameters of the target cell; and the terminal judges whether the target cell meets the cell residence conditions according to the acquired cell residence parameters, and if the target cell meets the cell residence conditions, the terminal determines that the target cell is a reselected cell. The cell reselection method and the cell reselection terminal have the advantages of reducing unnecessary cell selection in related technology, reducing failure times of the reselection, avoiding the ping-pong effect of the cell reselection, reducing the calculation consumption and power consumption of the terminal, avoiding bad influence of the frequent switching of the wireless access technical networks on the services of the terminal and improving the selection property of the wireless access technology.

A portable cooler and table assembly that may be easily transported in a single, self-contained unit is disclosed. The assembly may be converted for use as a table for a variety of recreational activities, e.g., dining, drinking, games such as ping pong, beer pong, table hockey, card games, board games, preparation for sporting events and meals. The table and cooler may be permanently attached to each other, or alternatively, the cooler may be detachable from the table. The table may fold or collapse to assist in converting the assembly from a compact, lightweight transportable unit into a fully extended and operable table and cooler. The table surface may contain surface features such as grooves, indentations, nets, game pieces, etc. The cooler may comprise any container that is capable of containing ice or some other refrigeration or heating system, e.g., a conventional 54 quart beverage cooler. Alternatively, the cooler may be replaced with a storage container or other storage device. The assembly may also contain various wheels, legs and handles to assist in mobility and conversion.

The invention discloses a mobile load balancing (MLB) method which is applied to a wireless cellular mobile communication system and realizes load balance between adjacent cells in a same cell cluster by taking a cell cluster containing a plurality of cells as a base unit. Concretely, each cell in the cell cluster initiates MLB operation to the adjacent cells according to the load state per se and the load states of the adjacent cells and carries out load transfer with the adjacent cells. The MLB operation initiated by each cell comprises active MLB initiated by a light load cell and passive MLB initiated by a serious overload cell. The cells in the cell cluster can periodically initiate MLB operation for many times, thereby realizing load balance gradually and stably between two adjacent cells, solving the problem of overload of the cell subjected to MLB, avoiding the occurrence of a ping-pong effect, and increasing the convergence rate of load balancing. The adjacent cells exchange load state information, thereby saving the network signaling overhead, lowering the load of network interaction, increasing the utilization ratio of wireless resources, and furthermore ensuring the stability of the network.

In this invention, a novel vertical handover control algorithm, consisting of a throughput-based mapping function, QoS-based dynamic handover thresholds, and performance-based trigger timers, are proposed to resolve uncommon pilot problem, QoS requirements, and ping-pong effects, respectively. An analytic model based on a finite state machine is developed to evaluate the proposed algorithm in terms of the handover frequency and achievable throughput. A numerical analysis is also provided to further quantify the performance impacts.

The invention discloses a quasi-periodic handoff triggering mechanism based on handoff invitation sending. The quasi-periodic handoff triggering mechanism based on handoff invitation sending comprises, according to the mobile line diagram and the moving speed of a mobile terminal as well as the localization information of the base station of a serving cell and the base station of a neighboring cell to structure a cell cluster and to determine the reference time, the basic period and the quasi-period for transmitting handoff invitation; transmitting the handoff invitation to the mobile terminal periodically through every substation in the cell cluster and accordingly triggering handoff. The quasi-periodic handoff triggering mechanism based on handoff invitation sending overcomes the shortcomings of traditional handoff triggering mechanisms based on signal strength receiving and enables handoff triggering to be timely, accurate and reliable, and meanwhile, shortens the executing time for handoff, improves the handoff speed and efficiency and avoids ping-pong handoff, thereby having a broad application prospect in wireless communication environments with relatively fixed mobile lines and relatively high moving speed such as high-speed railways, highways, urban BRT (bus rapid transit) and the like.

The invention discloses a method for acquiring a ball-hitting gesture and a ball-hitting speed of a ping-pong robot racket. The method comprises the following steps of: establishing a ping-pong ball flying analysis model; calculating a ball outlet speed after the robot racket hits a ball by using the model according to positions of an expected ball-returning falling point and a predicted hitting point in combination with a speed of the expected ball-returning falling point; deriving a group of non-linear equations containing the ball-hitting gesture and the ball-hitting speed of the racket according to the speeds of a ping-pong ball before and after the racket hits the ball and in combination with a rebounding model of the racket and a kinematics model of a ping-pong robot; and solving the non-linear equations by using a known optimization method, and calculating the ball-hitting gesture and the ball-hitting speed of the ping-pong robot racket.

A method for determining the co-location of cell sites includes the steps of acquiring a neighbor cell list (602), monitoring the neighbor cell sites for longitude and latitude information (604). Te longitude and latitude information is used fo calculating the distance and bearings between the serving and neighbor cell sites (606 and 608). Neighbor cell sites having similar bearing and distances are grouped together (610), if grouped neighbors are in close proximity, the centroid of a polygon formed by the sector vertices is determined (614) and new latitude and longitude information for the centorid is determined (616). The neighbor cell list is then modified to indicate sectored versus omni-directional sites (620) and the information is then used by the communication device to make better mobility decisions. In another embodiment of the invention, the co-location information is used to minimize ping-pong effect which causes a communication device to be continually being handed back and forth between ell sites.

The invention provides a handover type based method for optimizing handover parameters in a wireless cellular communication system. The method comprises the following steps: firstly, determining the handover type according to handover priority information; and optimizing handover parameters according to the corresponding handover type. In the method, a service base station judges that user equipment UE belongs to one of a radio quality based handover type H1, a mobile speed based handover type H2, or load condition based handover type H3 according to the preset priority algorithm, and optimizes the corresponding handover parameter HOM (Handover Margin) and TTT (time-to-tiger) according to the handover type. The method optimizes the handover parameters according to the handover type of the user equipment so as to avoid the ping-pong effect and reduce handover time delay and unnecessary handover times.

The invention relates to the field of image processing and machine vision, and particularly relates to a system and a method of recognizing, positioning and tracking a ping-pong trajectory. The image in the case of movement of a ping-pong ball is acquired in real time through two high-speed high-definition cameras; after target recognition and space positioning are carried out on the acquired image, data are formed, the data are filtered and tracked, and ping-pong trajectory information is obtained; and according to the ping-pong trajectory information obtained through a ping-pong target tracking module and in combination of inner and outer parameters of the cameras, a ping-pong ball three-dimensional trajectory is simulated and reproduced. The problems of interference of complicated background changes and not high tracking real-time performance of a quick moving target can be solved, and the accuracy of tracking and acquiring the image information of the high-speed moving target is enhanced.

The invention discloses a switching self-optimizing method for a mobile communication network. The method comprises the following steps of: periodically acquiring switching performance indexes such as dropped call rate, switching failure rate, ping-pong switching rate, congestion rate and the like of a switching region; judging whether a current switching problem is early switching, late switching, ping-pong switching or switching to a wrong cell according to the value of each acquired switching performance index; and adjusting switching parameters such as cell offset, trigger time and the like to automatically solve the switching problem, effectively control the phenomena of call drop, switching failure, ping-pong switching, switching to a wrong cell and the like in the switching process, increase the utilization ratio of a wireless resource and enhance the user service quality. According to the method, a large quantity of human resources consumed by the adjustment of the switching parameters can be effectively reduced, the operation cost is saved, and the operation efficiency is increased remarkably.

A network-equipment-implemented method and apparatus for tracking durations of flows received at a network node in consecutive intervals utilizes two counting bloom filters in ping-pong operation to reduce memory and processing. Identifiers for flows that exceed a predetermined duration or number of intervals are stored in a long-duration flow-identifier table. Hash functions used within the counting bloom filters and optionally used in the long-duration flow-identifier table are chosen to minimize the probability of false positives in the detection of long-duration flows. In some embodiments, flows are sampled to conserve memory and processing resources at the risk of missing detection of some long-duration flows.

An adaptive data stream filter removes narrowband interference from the CATV return path prior to these paths being combined in the network. A method for removing narrowband interference from the CATV return path detects potential narrowband interference in real-time and adapts a filter to remove this potential narrowband interference. An exemplary embodiment of the above method uses previously created filters that are combined based on detected interference in an adaptive manner to continually adapt to new interference sources. Another exemplary embodiment of the above method calculates new filter coefficients for the data stream filter based on detected interference. In another embodiment, two filters are operated in a ping-pong manner for each band of interference identified as above threshold. This enables updating of one filter while another filter is performing the data stream filter operation.

An embodiment of the invention discloses a cell optimization method. The method comprises obtaining mobility robustness optimization (MRO) and mobility load balancing (MLB) key performance indicators (KPIs) of managed communities; selecting a cell with the poorest MRO and MLB combined performance indicator as a cell to be optimized, selecting a terminal to be switched from a switching region of the cell to be optimized, and determining an adjacent cell to be optimized; obtaining a relative switch offset of the cell enabling the terminal to be switched to meet an A3 event and an MRO KPI of the cell to be optimized to be lower than a preset value; and configuring the relative switch offset of the cell for the terminal to be switched. Correspondingly, an embodiment of the invention further discloses a cell optimization device and a communication system. By means of the technical scheme, the cell with the poorest performance and the corresponding adjacent cell are optimized integrally on the basis of calculation of the KPI, ping-pong switching is reduced to the greatest extent while cell load balance is achieved, and accordingly, conflicts of MRO and MLB performances are reduced effectively, and the user experience is improved.

The present invention discloses a coder of LDPC code used in hierarchical quasi-cyclic expansion structure, comprising an input cache, a first depositing and caching pipeline grade, a second depositing pipeline grade, a third caching pipeline grade, a fourth depositing and caching pipeline grade and an output grade. By utilizing the character that the check matrix H is formed by connecting the quasi-cyclic sift matrix, the present invention simplifies the pipeline structure of the RU coding method, reduces the grades of the pipeline from sixth grade to fourth grade, and shortens the coding delay. Besides, the present invention decreases the largest pipeline delay and increases the coding thuoughput according to the fulfilling character of the main functional module. And the present invention also reduces the energy consumption of the coder ROM according to the operational character of the quasi-cyclic sift matrix; replaces the sparse matrixmultiply vector in the RU method with the quasi-cyclic sift unit matrix multiply vector; and replaces the non sparse matrix multiply vector in the RU method with the quasi-cyclic sift matrix multiply vector. A larger storing space can be remained in the ping pong RAM amid the grades to fit the demand of the variable length code and the VBR.