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

The invention discloses an optimized deployment method of a service function chain in a 5G mobile network, belonging to the field of mobile communication. According to the method, when server resources and bandwidth resources of an underlying network are allocated to each service function chain request coming dynamically, three different mapping solutions are brought up due to consideration of deployment manners of a VNF combination policy, a virtual reuse policy and a temporary chain policy in deployment. The three different mapping solutions are as follows: minimizing the resource cost, wherein the highest mapping cost of each virtual chain that a service provider can accept is limited in deployment; minimizing the path length of the service function chain, wherein the highest mapping cost of each virtual network function that the service provider can accept is limited in deployment; and fairly optimizing and calculating the resource cost and chain resource cost by using a gender war game theory model. All the three solutions of the invention can minimize the total mapping expenditure as much as possible while improving the mapping success rate of the service function chain request and the resource use ratio of the underlying network.

The present invention is directed to a distributed approach to handoff and cell site selection that takes into account the load dynamics in a multi-cell system.

A method and a device for determining a search space and for determining candidate control channel resources are provided in present invention. The method for determining the search space includes: determining the number of downlink control information bits of each type of control channel currently required to be monitored by a UE; determining a temporary search space corresponding to the each type of control channel according to a mapping relationship currently used by the UE; and determining that an actual search space corresponding to a selected type of control channel is all or a part of CCEs of a union of temporary search spaces corresponding to all or a part of control channels with the same number of the downlink control information bits, when the DCI bit number of one or more other control channels is the same as the DCI bit number of the selected type of control channel.

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 provides a determining method and device for a search space in a narrowband system. The method comprises the steps that a terminal detects the search space in which a narrowband downlink control channel is located, wherein the search space takes R sub-frames or a sub-frame set as a unit in a time domain, the search space takes a whole narrowband or M subcarriers in the narrowband as the unit in a frequency domain, an R and M value set is a positive integer, the sub-frame set comprises X sub-frames, and an X value is a fixed value or is configured by a base station. Through application of the method and the device, the problem that in related technologies, the structures of the search spaces of the control channels in an LTE (Long Term Evolution) system are not applicable to demands of an NB-IoT (Narrowband Internet of Things) narrowband system of which frequency domain bandwidth has only one PRB (Physical Resource Block) is solved.

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 present invention discloses a control information transmitting and receiving method, a control information transmitting and receiving device, and a control information transmitting system, wherein the control information transmitting method comprises: a base station determines the source repeatedly sending the control information according to predefined information, wherein the predefined information comprises at least one of: a starting sub-frame k0, a system frame number SFN, the number of repeat times or a repeat level N and a user identification UE ID; and the base station repeatedly sends control information on the source.

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 transmission method and a device. The method comprises the following steps of: setting a transmission mode X; sending downlink control information to user equipment through downlink control information format corresponding to the transmission mode X, wherein the downlink control information format comprises at least one element in the following elements: the downlink control information format 1A, the downlink control information format 0, the downlink control information format Y1 and the downlink control information format Y2. In the correlation technique, the transmission mode design scheme for reducing the load requirement of the physical downlink control channel (PDCCH) is also not determined. The invention provides the transmission mode design scheme, through the transmission mode design and the corresponding PDCCH load reduction, the capacity of the PDCCH can be improved, the blockage rate of the PDCCH can be reduced, and the practical application is convenient.

The invention discloses a service functional chain deployment method of transmission delay optimization. A service functional chain is deployed with shortening delay of the service functional chain being a main purpose, merging and splitting of network functions are combined, and meanwhile a deployment path with the shortest delay is sought. According to the method, merging and splitting algorithms are adopted for the transmission delay problem, a merging-splitting model is established, meanwhile a brand new algorithm seeking the shortest path is brought up, and p shortest paths can be sought simultaneously to deploy the service functional chain. According to the service functional chain deployment method of the transmission delay optimization, on the basis of shortening the delay of the service functional chain, a higher receptance and a shorter responding time for deploying the service functional chain are achieved. Besides, the method can avoid segmentation of resources, and maintain the robustness of networks.

Routing and bandwidth assignment of new paths of different bandwidths, occupying different numbers of adjacent frequency slots in a wavelength switched optical network, involves selecting a route, and assigning a set of adjacent frequency slots. The assignment can place wider bandwidth ones of the new paths at an opposite end of a spectrum of the available frequency slots, to an end where narrower bandwidth ones are placed. A size of sets of available adjacent slots remaining after the assignment is likely to be increased, compared to a conventional first fit assignment. A wider subsequent new path can sometimes be accommodated along all or some of the route and thus the blocking probability can be lowered. The selecting of which of the possible routes to use can be made dependent on which has more sets of available adjacent frequency slots, or which has a wider gap between occupied slots.

The invention discloses an optimal path selection method based on the load balance in a communication network, which can balance the load at each node among networks and reduce the network blocking rate. The method includes the following steps: when selecting an optimal path, a top-level network element manager knowing an entire network topology utilizes the existing shortest path algorithm to obtain a plurality of short paths, selects one path with small load or short path as the optimal path, or utilizes the existing shortest path algorithm to calculate and determine a certain shortest path as the optimal path, then increases weights of the determined optimal path according to the path length or load factor, calculates the shortest path among other nodes according to the path weights, and then takes the obtained shortest path as the optimal 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 requests to protect an environmentally-friendly energy-saving network exclusive protection method, which relates to the communication network field. The invention provides the environmentally-friendly energy-saving network exclusive protection method by aiming at the performance defects that an all optical network has more energy consumption and high blocking rate and damage is serious once faults happen, and by aiming at the problem that the traditional environmentally-friendly energy-saving and protection technology is not suitable for a large completely-dynamic high-speed WDM (wavelength division multiplexing) network. A corresponding optical fiber cost factor is determined by the wavelength use situation of a single optical fiber on a link to further determine the link cost factor, and finally, the link cost factor is combined with the corresponding link energy consumption to obtain a link energy consumption weight mode to find an optimal route; finally, wavelength distribution is carried out; the phenomena that overmuch energy is used and an overlong route is formed can be avoided; and meanwhile, each working path can be protected to the maximum degree.

The invention provides a steel plate width control method, which comprises the following steps of: determining a mathematical model based on a rough rolling mathematical model setting and broadening coefficient according to a width difference between the width of an incoming slab and the width of a finished strip steel, namely a side pressure quantity, and adding a broadening compensation coefficient of between -0.1 and -0.65 into the mathematical model; and during the rolling process, adjusting the broadening compensation coefficient twice to thrice according to the practical rolling state and the strip steel width detection result, wherein the adjusting amplitude of each time is 0.1. Therefore, the method basically eliminates the steel plate width oscillation phenomenon, reduces the strip steel blockade rate generated by excessive width difference by 0.011 percent, improves the width precision qualification rate of the strip steel by 4.2 percent, and has quite remarkable economic benefit.

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.

The invention provides a glazed brick production process, belonging to the technical field of building ceramic production. The production process comprises the steps of forming cloth material, applying ground coat, printing, applying cover glaze, sintering, polishing and grinding, wherein ground coat used in the ground coat applying step is phosphor-boron or boron-calcium multiphase opaque glaze, and the ground coat contains 0.5%-3% (in percent by mass) of anatase titanium oxide and 0.5%-5% of attapulgite. Compared with the prior art, the glazed brick production process provided by the invention has the advantages that the glazed brick production process is less in ink dosage, clear in color, and almost free of chromatic aberration color cast; moreover, inkjet blocking probability is lowered, cleaning and maintaining times of a spray head are reduced, production continuity is improved, and a situation of midway downtime rarely happens except from necessary maintenance.

The invention discloses a hierarchical cellular network base station sleep method based on a low-power base station. The hierarchical cellular network base station sleep method comprises the following steps of: S1, executing a sleep judgment of a macro base station according to the distribution density of the low-power base stations in a macro cell of the macro base station; and S2, after the sleep judgment of the macro base station is completed, executing a sleep judgment of the lower-power base stations in the macro cell. According to the invention, the problem that the traditional base station sleep policy is not applicable to a hierarchical network with co-existence of base stations of different types is solved; according to the characteristics of the hierarchical network, the advantages of the low-power base stations are fully utilized to make the sleep of the macro base station more flexible; and due to a dynamic bias value set in the sleep judgment, the blocking rate of a system is effectively reduced particularly in a user amount increase period, and the QoS (Quality of Service) requirements of users are met; and the judgment is made always by taking minimal energy consumption as a target, so that the energy consumption of the system is minimized on the basis of guaranteeing the QoS of the users.

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 provides a flow control device, a flow control method, a network flow management system and a network flow management method in order to effectively reduce user blocking rate and improve utilization of each network in a heterogeneous network. The flow control device comprises a receiving unit, a judging unit and a distributing unit, wherein the receiving unit receives network status information and network congestion information, the network status information comprises multiple network types between a base station and terminals and a service type requested by a user, the network congestion information shows whether the base station and the terminals congest or not, the judging unit judges whether the service type requested by the user is suitable for other network transmission in user's area or not under the condition that the network congestion information shows current network congestion of the service requested by the user, and from the other networks which are judged out by the judging unit and suitable for transmission, the distributing unit selects a certain network as an alternative target network to replace the current network.

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 unit-combination type heat transfer enhancement device of the invention relates to the field of the unit type heat transfer enhancement device which utilizes the fluid of a heat transfer pipe as the power, comprising rotors, a support frame, sleeve shafts and a connecting axis, wherein the support frame is fixed at the two ends of the heat transfer pipe; the two ends of the connecting axis are respectively fixed on the support frame; the centers of the sleeve shafts are through holes; a plurality of the sleeve shafts are arranged on the connecting axis in a penetrating manner; the rotors are arranged on the sleeve shafts in a penetrating manner; and one or more rotors is / are matched with one sleeve shaft. The rotor consists of flow-disturbing rotary vanes, a hinge structure and tail end spiral drive blades. The fluid in the pipe in the technical scheme drives the rotors to rotate at a proper speed by the tail end spiral drive blades, thus having the inhibiting and cleaning effects on the fouling deposit; the proportion of the length of the flat and straight part of the flow-disturbing rotary vane and that of the tail end spiral drive blades can be changed flexibly; and according to the practical needs, bulges are also arranged on the thin sheet of the edge to further disturb the fluid to flow, thus further improving the effects of the heat transferring and self cleaning.

The invention provides a resource reservation protocol-traffic engineering (RSVP-TE)-based resource reservation method capable of allocating priorities to services requiring connection and processing according to the priority, namely a priority-based inter-domain resource reservation method, which is applied to an all-optical network with a multi-layer multi-domain control sub-network. The technical key points are that different priorities are allocated to the services requiring connection, and a resource reservation process is completed by two steps of temporary reservation and definite reservation. The method has lower service blocking rate than a forward reservation protocol (FRP), has shorter service connection establishing time than a backward reservation protocol (BRP), greatly optimizes network performance, overcomes the defect that the conventional resource reservation methods cannot adapt to the multi-layer multi-domain optical network environment, and effectively establishesLSP in the multi-layer multi-domain network with wavelength conversion capacity. Meanwhile, service priority differentiation is supported, and the service with higher priority request the resource reservation in priority; and the method meets the requirement of development of future ASON networks.

The present invention discloses a wavelength division multiplexing (WDM) optical network route and wavelength distribution method, including digital computer, said digital computer executes the following steps: making network resource configuration; calculating route between any two notes in the optical network; forming standby route set; according to the requirements of calling service taking out all the stand by routes related to said service from stand by route set and calculating according to the formula, and selecting route and wavelength which have minium affection on network resource to distribute them to calling service. Said invention can reduce blocking rate of whole network, improve fairness and raise performance of whole network.

The invention relates to the technical field of network communication, in particular to a QoS (Quality of Service) route distributing method for realizing load balance in an overlay network. The method comprises the steps of: introducing resource fair index representing path bottleneck degree, establishing a new load balance utility function, correcting a QoS bound term weight by adopting an adaptive system load state weighting method, and searching an optimal load balance service path. Compared with the traditional route method for load balance in the overlay network, the invention has the advantages of lowering the fluctuation degree RLCD (Residual Link Capacity Deviation) and RNCD (Residual Node Capacity Deviation) of the network load distribution, and being capable of improving the QoS service success rate (QSSR).

The embodiment of the invention discloses a method and a device for computing a service transmission path in an optical transport network. The invention solves the problem of low utilization ratio of network resources due to high blocking rate of service transmission in the network. The method comprises the following steps of: sequencing a plurality of services which arrive according to the preset standard scheduled time in time sequence; selecting one service from the sequenced services in time sequence at a time; and updating the weight of each edge in the auxiliary chart according to the bandwidth and duration time of the selected service, computing the minimum weight path of the selected service from the source node to the destination node according to the weight of each edge in the updated auxiliary chart, and updating the state of the auxiliary chart according to the resources occupied by the minimum weight path of the selected service. The embodiment of the invention is mainly used in the field of communication, and especially in the computation process of the service transmission path in the optical transport network.

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 makes a request of protecting a handover decision-making method based on fuzzy logic and TOPSIS algorithms. The method comprises two steps of handover candidate user screening and target network selection. At the handover user screening stage, a fuzzy logic algorithm is used for processing user mobile information to obtain a handover suitability degree; and a handover candidate user is selected by combining RSS, a user type, and the user handover suitability degree, and a handover candidate user set is constructed. At the target network selection stage, multi-cell selection is carried out by using an optimization objective function, wherein the objective function considers a cell load, a handover cost, and a network performance comprehensively and the network performance is obtained by processing the RSS, a time delay, mobility support, and energy consumption comprehensively by using a TOPSIS algorithm, and the function aims at realizing cell load equilibrium, network cost minimization, and network performance optimization; and then an optimal cell is selected based on the optimization function and is used as a handover target network. Therefore, the user requirement can be guaranteed and the network equilibrium can be realized.

The invention relates to a flexible optical network anycast business energy-saving routing method based on resource perception, and belongs to the technical field of optical fiber communication. According to the method, an anycast business data center selection mechanism based on resource perception is adopted firstly, a data center with the highest resource available matching degree is selected for business by the mechanism according to the anycast business resource demands and data center available resources, and "equal" allocation of the data center resources is realized to some extent; furthermore, a dredge-based green and energy-saving routing and frequency spectrum allocation strategy realizing transmission from the data center to request users is adopted, electric layer dredging is selected for anycast business by the strategy for priority , then optical layer dredging is selected secondarily, and business is enabled to find a transmission optical path with the minimum energy consumption by the routing strategy with fusion of multipath and single paths so that link frequency spectrum utilization rate can be enhanced and network blocking rate can be further reduced. Frequency spectrum flexible optical network service quality can be effectively enhanced and network energy consumption can be reduced by fusion of the data center selection mechanism and the green and energy-saving routing and frequency spectrum allocation strategy.

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.