438results about How to "Reduce blocking rate" patented technology

A link state routing communication device allowing path precalculation satisfying the required quality of a connection and reducing the call blocking probability is disclosed. A path satisfying a connection request can be selected from a plurality of precalculated paths which are stored for each destination in a memory. The precalculated paths reflect the latest link resource information using the feasibility check operation or precalculated path update operation. Therefore, a blocking probability of connection setup using precalculated paths can be decreased. In a border node, summarized information is calculated based on precalculated paths and therefore high-speed summarized information calculation is allowed, resulting in reduced computation load.

The invention discloses a routing and spectrum resource allocation method and a system for resource awareness in an elastic optical path network. The method comprises the following steps that when a request for communication service between an originating node and a destination node arrives, firstly whether the established idle optical paths in the current network can carry the communication service or not is judged, if so, the idle optical paths are directly used for communication, and if not, a PCE (Path Computation Element) generates an auxiliary list of candidate optical paths, wherein the auxiliary list contains link hops of each candidate optical path; a modulation method is determined according to the link hops and frequency slots required by the corresponding candidate optical path for carrying the communication service are computed; the PCE selects a working path according to the required frequency slots and the available frequency slots for the optical path; frequency slot distribution is conducted in the working path to establish a new optical path; and communication is conducted between the originating node and the destination node. After the communication is completed, the new optical path is temporarily not removed, a timer is started up and the steps are repeated within fixed time to realize the resource awareness in the optical path network and solve the problem of high network service blocking rate caused by blockage of the shortest path.

The invention discloses a heterogeneous wireless network vertical switching method based on a depth deterministic strategy gradient. The invention relates to the technical field of communication, solves the problem that user terminals with different service types are frequently switched among different networks in a heterogeneous wireless network environment, and adopts the technical scheme that an analytic hierarchy process is adopted to calculate the weight of network state parameters for constructing a reward function; the strategy network makes a switching decision based on the current network state, then a reward is obtained, the evaluation network is updated according to the reward, and the strategy network is updated in the suggested direction of the evaluation network; the algorithm is not only based on the current network state, but also considers the potential future network state to ensure the QOS requirement of the user. The optimal access network can be selected for usersof different service types, the average switching frequency and the switching failure probability can be effectively reduced, meanwhile, the blocking rate of new calling users is reduced, and the resource utilization rate of the system is improved.

The invention provides a mobility management method based on a clustered superdense small network in a 5G system. The mobility management method comprises the following steps: dividing a superdense cell into a plurality of microcell clusters, wherein each microcell cluster has a common pilot frequency; predicting the channel condition of the cell by using a birth-death model, and according to the quality of a received cell signal, comprehensively considering the business condition and the mobility state of a user terminal and selecting a proper base station as a switching target, wherein the blocking rate of new equipment calling and switching can be obtained, a correct switching strategy is established, the switching success rate is improved, and the call drop rate of the user terminal and the blocking rate of calling are reduced; when equipment is in an idle state and the user terminal is in a low-speed state, switching to a pilot frequency base station of a microcell; when the user terminal is in a medium-speed or high-speed state, switching to a macro base station; when the equipment is in a connection state, namely when a business service exists, if the user terminal is in the low-speed state, switching to a small base station of the microcell; when the user terminal is in the medium-speed or high-speed state, switching to the macro base station.

An embodiment of the invention discloses a PDCCH (physical downlink control channel) information transmission method and a device thereof. Through applying a technical scheme of the embodiment, a base station determines exclusive PDCCH search space of a terminal device according to deviation value information, and sends PDCCH information to the terminal device. The terminal device also determines the exclusive PDCCH search space of a terminal device according to the deviation value information, and acquires corresponding PDCCH information through the PDCCH search space. Thus, a blocking probability in a PDCCH scheduling process is reduced, and reliability of PDCCH transmission is raised.

The invention discloses a real-time migration method of a service function chain applied to a cloud computing network. The method includes the following steps: when remapping and migrating service function chain requests, considering each virtual network function and link connection condition in each service function chain request, and remapping and migrating the service function chain requests with the goal of consuming the minimum server resources and bandwidth resources and reducing the migration time, downtime and blocking rate of the service function chain migration requests in the case of meeting relevant constraint conditions. According to the method disclosed by the invention, the specificity of the service function chain requests is comprehensively considered, the common bandwidthresource requirements and server resource requirements are optimally configured, and the advantages of wide application scope, low remapping cost, short downtime, low mapping blocking rate and the like can be achieved.

A dynamic distribution method for synchronous digital system equipment space-time division cross timeslot resource is provided. The service data of the whole network collocated on a network management system is sent down to a network element. The network element adjusts the service collocation data. The states of all the space-time division resources are marked. One service collocation record is obtained and the required space-time timeslot resource is appointed. Whether the time division resource distribution is needed is determined. Whether the timeslot has already previously been distributed with resource is determined. Whether the distributable resources are available is determined; if the distributable resources are available, the occupation marks are distributed and given to the resources and the timeslot information is set down. The space-time division resource states are renovated, the time division resources no longer to be used are released and the resources as usable are remarked. The invention utilizes most of the node cross connection ability to ensure that the equipment have high service transmission rate and low blocking rate. The problem that the cross connection ability of the space-time division chip is not enough is effectively solved and the service break is avoided.

The invention discloses a method for calculating the bandwidth and distributing the bandwidth in a wireless ad hoc network. The method includes the TDMA-based bandwidth calculation method in the wireless ad hoc network and the bandwidth distribution scheme based on the service priority, wherein the TDMA-based bandwidth calculation method in the wireless ad hoc network includes the bandwidth calculation method under the condition of not considering a hidden terminal and the bandwidth calculation method under the condition of considering the hidden terminal. The available bandwidth information between any two nodes is obtained, and a source node can select the routing, meeting the bandwidth requirement, to the target node and can be used for deciding whether to allow new connection to be accepted or not. According to the self-adaption bandwidth distribution mechanism based on the service priority, the emergency degrees of service requirements of different services are taken into consideration, application is flexible, implementation is easy, and the method is feasible.