32 results about "Call blocking rate" patented technology

The invention provides for the management of wireless resources, which can reduce call blocking by allowing high priority services, under suitable conditions, to use resources allocated to low priority services. Thus high priority services can pre-empt the usage of wireless resources by low priority services. This has the advantage of reducing call blocking for high priority calls, while permitting low priority calls to have more access to radio resources than conventional systems with the same call blocking rate. Thus a base station can implement a preemption mechanism that would reclaim Walsh Code and Forward Power resources from an active Supplemental Channel (SCH) burst in order to accommodate incoming Fundamental Channel (FCH) requests.

The invention discloses a call access control method of a D2D communication system based on interference suppression. The terminals of the D2D communication system include a cellular network terminal (CUE) and a D2D mobile terminal (DUE). The method includes: (1) initializing system parameters, Including the signal-to-noise ratio threshold, the power of the D2D transmitting terminal, and the signal strength of the CUE received by the base station; (2) Obtain the number of DUE pairs in the network and the distance between the terminals; (3) Update the parameter value of the interference in the network, and calculate Radius of the protected area; (4) Judging whether the DTUE to be connected to the network is located in the CUE restricted area, and if so, go to step 7; (5) Judging whether all DUE pairs meet the communication service quality requirements after the new DUE pair accesses the network, if not If it is satisfied, go to step 7; (6) The new DUE pair is connected to the network, and the number of DUEs is updated; (7) The method ends. The invention can effectively eliminate extra interference, reduce new call blocking rate and increase network capacity, has superior performance and is easy to implement.

The invention discloses a heterogeneous network access selecting method for pre-screening a network based on a predictive call blocking rate, and belongs to the technical field of heterogeneous wireless network access. The method mainly comprises three steps: pre-screening of a candidate network, subjective and objective weight combined network preference selection and access execution of an optimal network. The method can effectively remove the networks which are relatively congestive and weak in signals, thereby improving the efficiency that a user selects the optimal network and the quality of service; the optimal network is selected by the traditional subjective and objective combined network preference selection algorithm based on the pre-screened candidate network, and the optimal network is finally accessed according to the judgment result of a network selecting decision. The simulation result shows that the judgment process of the algorithm gives consideration to both of the network state and the user preference, the effects of reducing the ping-pong effect and maximizing the utilization rate of network resources are achieved, and the accuracy and the practicability of network access are improved.

The present invention relates to the field of communications, in particular to a method and device for avoiding interference to a call based on a frequency spectrum map, comprising the following steps: Step 1: classifying new or ongoing calls; The auxiliary information is extracted from the frequency spectrum map data, the channel availability is classified according to the auxiliary information and the service classification result, and the interference avoidance is performed on the new call or the ongoing call according to the availability classification result. The present invention can effectively reduce the new call blocking rate, handover failure rate, and call drop rate of the call by avoiding the interference of the new call or the ongoing call, and at the same time reduce the situation that the call that has been connected cannot realize correct communication due to serious interference .

The invention relates to a service bandwidth adjustability prediction based heterogeneous wireless network load balancing method. The service bandwidth adjustability prediction based heterogeneous wireless network load balancing method comprises the steps of 1) establishing a seasonal moving average differential model; 2) calculating a prediction step length, obtaining a predicting moment of a call arrival rate and predicting the call arrival rate of the heterogeneous wireless network in the current time bucket through the seasonal moving average differential model so as to obtain the call arrival rate at the predicting moment; 3) selecting a target network to which a service is switched by adopting an SAW algorithm or by adopting an improved SAW algorithm based on the call arrival rate at the predicting moment; and 4) after the service is switched to the target network, establishing a power and exponential function transfer curve based on the call arrival rate at the predicting moment and adjusting a service access bandwidth nonlinearly. Compared with the prior art, the service bandwidth adjustability prediction based heterogeneous wireless network load balancing method has the advantages of balanced active load, accurate and scientific prediction algorithm, predictable bandwidth adjustment algorithm, rapid and effective load control, decreased fluctuation of load, low call blocking rate and the like.

The invention discloses an adaptive channel allocation method for an oversubscribed LEO satellite system, which belongs to the field of mobile communication; specifically, firstly, a mobility model of the LEO satellite system is established, and conditions for channel allocation strategies are set; for beam cell C i , initially set the total number of virtual channel occupancy S = 0; then, the call request for a high-priority user accesses the beam cell C i , judging whether the call request is a new call request or a switching call request, respectively performing adaptive oversubscription channel allocation processing for different requests, and deciding whether to access the new call request or the switching call request; finally, the beam cell C i Process the terminated call, and transfer the reservation request on any virtual channel to the available channel it occupies; the advantage is that it can ensure that the call drop rate of high-priority users is close to zero, and the acquisition is small The blocking rate of new calls improves the overall service quality of the system.

A channel distribution system of multifrequency radio network includes channel distribution centre, micro-subarea base station, macro-subarea base station and mobile station. The method for channel distribution incldues the following: the channel distribution centre distributing radio channel of base station in micro-subarea or macro-subarea to the mobile station to be used by applying the method of recombination to requirement, when the mobile station is trying to set up connection or to carry on switching. A method of recombination to requiring works as distributing idle channel in micro-subarea first and secondly distributing idle channel in macro-subarea if there is no micro-subsarea channel; carrying on recombination, if there is no macro-subarea channel. Recombination is to switch connection of another station from macro-subarea to another micro-subarea to recover occupied macrosubarea channel and to distribute it to the

The present invention provides a clustering-based ultra-dense small network mobility management method in a 5G system. In the present invention, ultra-dense cells are divided into several micro-cell clusters, and each micro-cell cluster has a common pilot frequency. Use the birth-death model to predict the channel conditions of the cell, and according to the quality of the received cell signal, comprehensively consider the service situation and mobile state of the user terminal to select a suitable base station as the handover target, and the blocking rate of the new call and handover of the device can be obtained. Formulate correct handover strategy, improve the success rate of handover, and reduce the call drop rate and call blocking rate of user terminals. When the device is in the idle state and the user terminal is at low speed, switch to the pilot base station of the micro cell; when the user terminal is at medium and high speed, switch to the macro base station; when the device is in the connected state, there is business service , if the user terminal is at low speed, handover to the small base station of the micro cell; when the user terminal is at medium and high speed, handover to the macro base station.

The invention relates to a load balancing method for heterogeneous wireless network load advanced transfer. The method comprises the following steps: 1) predicting based on an initial seasonal movement average differential model to obtain a predicted value for history data; 2) modifying parameters of the initial seasonal movement average differential model; 3) acquiring call arrival rate data based on a time sequence in the heterogeneous wireless network during a current time period, calculating a prediction step, acquiring a prediction time, and acquiring a predicted call arrival rate at the prediction time; 4) establishing an advanced guiding factor according to the predicted call arrival rate at the prediction time, selecting a target network to which services are switched in candidate networks; and 5) when services are switched to the target network, setting an advanced bandwidth transfer value according to the network conditions at the prediction time. Compared with the existing technology, the method provided by the invention has the advantages of active load balancing, scientific and accurate prediction algorithm, predictive switching algorithm, load lagging elimination, call blocking rate reduction and the like.

The invention discloses an intelligent spectrum cooperative sensing method based on reinforcement learning, which is applied in the field of spectrum sensing. k , when a call request arrives, firstly, according to the channel priority list obtained by learning the latest channel status of each user based on Q-Learning technology, a decision to perceive the channel is made to minimize the scanning overhead; secondly, the node can detect the channel Request other SUs to perform cooperative spectrum sensing to improve the detection probability, and select secondary users with strong detection capabilities to cooperate through the bandit gambling machine mechanism to improve the detection probability; once the channel is detected, broadcast the status and detection weight of the detected channel to notify other SUs For the secondary user, the method of the invention effectively reduces the average channel scanning times, reduces the call blocking rate, and improves the detection probability.

The invention discloses an emergency preemptive upward handoff method based on a time threshold between heterogeneous networks. The method, based on the upward vertical handoff method based on the time threshold, provides a priority emergency preemptive algorithm for a cellular mobile channel in single cellular coverage to enhance a capability of the upward vertical handoff calling and the newly-added cellular calling for competing for the cellular mobile channel. The method has the advantages of greatly improving the system UVH calling loss rate and newly-added cellular calling blocking rate at the expense of the quality of service of the non-sensitive voice user part at a limited degree while maintaining a high cellular mobile channel utilization rate of the system, and realizing effective use of the channel resources.