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 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 provides a satellite and ground network switching method by preempting a reserved channel based on time. In the strategy, a cell I and a cell III are two cells in a ground network; a cell II is a cell in a satellite network; the cell I is a set of all cells including users wanting to switch the satellite network; the cell III is a set of cells, into which all satellite network users are switched; no available public channel exists in the cell II; only a reserved channel special for switching exists; when the cell II has a new call access request, the system can preempt the reserved channel according to a decision rule of the strategy so as to accept the new call access; the strategy is as follows: on the basis of channel reservation, on the premise that the switching performance of a previous cell is not influenced, whether a new call user can preempt the idle reserved channel in the cell or not can be judged based on the pre-switching time; therefore, the new call blocking rate is reduced; and the satellite resource utilization rate is increased.

The invention discloses an intelligent spectrum cooperative sensing method based on reinforcement learning, which is applied to the field of spectrum sensing. According to the method of the present invention, for each secondary user SUk, when a calling request is reached, a decision of sensing a channel is made to minimize the scanning overhead according to a channel priority list obtained by learning the channel state closest to the secondary users based on a Q-learning technology; secondly, the node can request other SUs to perform cooperative spectrum sensing to improve the detection probability when detecting the channel and selects the secondary user with strong detection capability to cooperate to improve the detection probability through a bandit gambling mechanism. Once detection of the channel is completed, the state of the detected channel and the detection weight are broadcasted to notify other secondary users. The method of the invention effectively reduces the average number of scans of the channel and reduces the call blocking rate, thereby improving the detection probability.

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 present invention relates to a heterogeneous wireless network joint admission control method. The method comprises the steps of defining a system state space, determining network overall energy consumption, setting an action set, determining a gain model, calculating a state transition probability and a maximized long-term expected gain, and using an improved value iteration algorithm to obtain an optimal strategy. According to the method, optimal admission control is used, in the condition that a network state and a service blocking rate / dropping rate are changed, based on the above resources, the allowance or rejection of calling access or switching is adaptively determined and controlled, and minimal energy consumption is obtained. By using a network overall energy consumption model, while the switching dropping rate and calling blocking rate are reduced, the QoS of a whole system is effectively ensured, the resource is effectively utilized, and two sides are balanced. Based on a semi-Markov decision process, a whole network admission decision strategy is obtained, and the computation and complexity of an algorithm are reduced.

The invention discloses a satellite network access selection method based on QoS (Quality of Service) constraint and load balancing, which mainly solves the problems of unbalanced overall load of a network and high real-time service time delay when a satellite is selected to access in the prior art. The method comprises steps of when a user initiates a service request, firstly identifying the typeof the service, and judging the relationship between the idle bandwidths of all satellites covering the user and the minimum bandwidth required by the service request to obtain an accessible satellite set; determining the dependence degree of the service on each parameter, and calculating the QoS comprehensive weighted value and the network load value of each satellite in the accessible satelliteset; and finally, calculating to obtain a comprehensive utility function value, and taking the satellite with the minimum function value as the satellite selected to be accessed by the user. According to the method, the service quality of the user and the overall load condition of the network are comprehensively considered, the end-to-end time delay of the real-time service and the new call blocking rate of the network are reduced, the satisfaction degree and the resource utilization rate of the user are improved, and the method can be used for satellite network communication.

The invention discloses a self-adaptive over-booked LEO satellite system channel distribution method, and belongs to the field of mobile communication. The self-adaptive over-booked LEO satellite system channel distribution method specifically comprises the steps of firstly building a mobile model of an LEO satellite system and setting a condition for a channel distribution strategy; aiming at a beam cell Ci, initially setting the total occupation number of virtual channels S to be equal to zero; then aiming at a call request of a user with high priority, accessing the beam cell Ci and judging whether the call request is a new calling request or a switched call request, and aiming at different requests, performing self-adaptive over-booked channel distribution processing respectively and determining whether to access the new call request or the switched call request; and finally, processing the ended call by the beam cell Ci and transferring a preserved request at any virtual channel to the occupied available channel. The self-adaptive over-booked LEO satellite system channel distribution method has the advantages of obtaining a relatively low new call blocking rate and improving the service quality of the whole system under the condition of ensuring that the switching call drop rate of the user with high priority is close to zero.

Method and system for managing radio resources to support voice and data traffic. The method uses adaptive resource partitioning between voice and data as the basis for improving call access control. A cost function is used to determine partitioning based on an operator's desired call blocking rates for both incoming voice and data traffic. Other examples of the cost function can be constructed using other quality of service measures for the carried services. In the dynamic burst allocation area, three methods are provided that make use of adaptive burst allocation, scheduled bursts and power borrowing between users as enhancements to the conventional methods used for integrated wide-band CDMA networks. The methods disclosed may be used in isolation as an enhancement to the current CDMA networks, or in combination to provide a combined improvement in network performance. The first scheme for adaptive burst allocation equalizes the rate of information transmitted by different data users. The second scheme varies adaptively the burst rate pool size as network interference varies. The third scheme links between the quality of service requirements and burst rate.

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

A method and apparatus for enabling a network to determine the call volume rate versus the call blocking rate on a predefined time interval basis over multiple predefined time intervals are disclosed. For example, if call blocking rates do not show a progressive trend of decline as call volume rates decline over multiple predefined time intervals, an alarm can be generated and corrective actions to flush out congested signaling message queues can be initiated to return the network to normal operating conditions.

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.

A method and apparatus for enabling a network to determine the call volume rate versus the call blocking rate on a predefined time interval basis over multiple predefined time intervals are disclosed. For example, if call blocking rates do not show a progressive trend of decline as call volume rates decline over multiple predefined time intervals, an alarm can be generated and corrective actions to flush out congested signaling message queues can be initiated to return the network to normal operating conditions.

The invention discloses a link establishment method by taking a user as a center in a cognitive radio scene, and belongs to the technical field of wireless communication. In a system taking the user as the center, the user can freely select a seller having available channels, so call blocking can be generated unless all sellers are overloaded. Therefore, the call blocking rate is reduced, and the spectral efficiency is improved. The method comprises three steps of initial spectrum environment sensing, optimal seller locking, and stabilization of transceiving spectral masks. In the initial spectrum environment sensing, an MS scans BS beacons, a seller of which the link quality meets the requirement is selected, a request is sent, and a seller model and a related loss function are established; in the optimal seller locking, the optimal seller is selected in the established model basin, the MS sends a locking request to an MRC, the MRC sends locking information to the selected seller, and an initial link is established between the MS and the seller BS; and in the stabilization of transceiving spectral masks, the difference between the transceiving spectral masks is reduced by exchanging spectrum detecting results between the MS and the BS, a stable link is established, and the BS provides communication service for the MS in the update time T. The invention introduces the thought of taking the user as the center, and can effectively reduce the call blocking rate and improve the spectral efficiency.

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.

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 interference suppression based cell admission control method of a D2D communication system. A terminal of the D2D communication system comprises a honeycomb network terminal (CUE) and a D2D mobile terminal (DUE). The method comprises the steps of (1) initializing system parameters, including the signal-to-noise ratio threshold, the power of a D2D emission terminal, and the CUE signal strength received by a base station; (2) acquiring the quantity of DUE pairs in the network and the distance of the terminals; (3) updating the interference parameter value in the network, and calculating the radius of a protecting area; (4) determining whether the DTUE to be accessed to the network is in a CUE suppression area; if so, entering step 7; (5) determining whether all DUE meet the communication service quality requirement after new DUE pairs accesses the network; if not, entering step 7; (6) accessing new DUE pairs to the network, and updating the quantity of the new DUE; (7) finishing the method. With the adoption of the method, the extra interference can be effectively removed, the new call blocking rate can be reduced, the network capacity can be improved, outstanding performances are achieved, and the implementation is easily carried out.

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 the field of communication, in particular to a method and a device for carrying out interference avoidance on a call based on a spectrum map, which comprise the following steps of: 1, carrying out service classification on a new call or an ongoing call; and 2, extracting auxiliary information from pre-stored spectrum map data, performing availability classification on channels according to the auxiliary information and the service classification result, and performing interference avoidance on the new call or the ongoing call according to the availability classification result. According to the method, interference avoidance is carried out on the new call or the ongoing call, so that the new call blocking rate, the switching failure rate and the call drop rate of the call can be effectively reduced, and meanwhile, the situation that the accessed call cannot realize correct communication due to serious interference is reduced.

The present invention relates to a heterogeneous wireless network joint admission control method. The method comprises the steps of defining a system state space, determining network overall energy consumption, setting an action set, determining a gain model, calculating a state transition probability and a maximized long-term expected gain, and using an improved value iteration algorithm to obtain an optimal strategy. According to the method, optimal admission control is used, in the condition that a network state and a service blocking rate / dropping rate are changed, based on the above resources, the allowance or rejection of calling access or switching is adaptively determined and controlled, and minimal energy consumption is obtained. By using a network overall energy consumption model, while the switching dropping rate and calling blocking rate are reduced, the QoS of a whole system is effectively ensured, the resource is effectively utilized, and two sides are balanced. Based on a semi-Markov decision process, a whole network admission decision strategy is obtained, and the computation and complexity of an algorithm are reduced.

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 discloses a load balancing method based on QoS sensing in a heterogeneous network. Load balancing in the heterogeneous network is achieved through the method. At first, loads of all base stations and reachable rates of users are imported into an optimization problem, and a corresponding optimized objective function is set, and modeled into a weighting utility maximization problem of the whole network; secondarily, a distributed method is adopted for solving. At a base station side, each base station needs to update the optimal load and a Lagrangian multiplier, and then broadcasts information to the users; at a user side, each user obtains the optimal base station serial number according to the received broadcast information and is connected with the base station serial number. Compared with an access method based on the users, the method is low in calculation complexity, easy to realize and higher in convergence rate, reduces the calling blocking rate, and obtains a higher load balancing level.

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.