459 results about "Traffic engineering" patented technology

A technique dynamically triggers an exchange of reachability information between a tail-end (remote) domain target node (e.g., a tail-end node) of a traffic engineering (TE) label switched path (LSP) and a local domain head-end node of the TE-LSP in a computer network. The inter-domain information retrieval technique is illustratively based on triggering a Border Gateway Protocol (BGP) session whereby at least a portion of the reachability, i.e., routing, information of the tail-end node is transmitted to the head-end node of the TE-LSP in accordance with BGP. Specifically, once a TE-LSP is established between the head-end node and the tail-end node, the head-end node triggers the tail-end node, e.g., through extensions to a request/response signaling exchange, to establish the BGP session. Establishment of the BGP session enables transmission of the routing information from the tail-end node to the head-end node. The head-end node uses the routing information to calculate routes, i.e., address prefixes and associated attributes, reachable from the tail-end node for insertion into its routing table.

In a traffic engineering technique, a determination is made as to whether any path of a number of predetermined paths meets requirements corresponding to a request. The predetermined paths are determined by substantially maximizing carried demand using at least traffic demand estimates and network topology information and by performing routing for the substantially maximized carried demand. If a given path meeting the requirements is found, a connection on the given path is created, if possible. The predetermined paths are determined through offline TE techniques referred to herein as offline design-based routing (DBR). The requirements for the path may include a destination address and a bandwidth. The offline DBR techniques can include uncertain static demand information or dynamic connections. The offline DBR techniques may be used with adaptive DBR techniques, such that paths are determined offline if possible but can also use shortest path first (SPF), constrained SPF (CSPF) or other techniques during an online path determination. An improvement to a conventional CSPF technique is also presented.

A technique dynamically enforces inter-domain policy and quality of service (QoS) for Traffic Engineering (TE) Label Switched Paths (LSPs) between a local domain and a remote domain in a computer network. According to the enforcement technique, a Path Computation Element (PCE) of the local domain receives a path computation request for an inter-domain TE-LSP from the remote domain, and triggers a policy verification procedure at a Policy Decision Point (PDP) of the local domain. The PDP determines whether the requested TE-LSP is allowed based on configured policy for the remote domain and previously established TE-LSPs from the remote domain. In the event the requested TE-LSP is allowed and subsequently established, a Policy Enforcement Point (PEP) along the TE-LSP, e.g., a border router of the local domain or a dedicated server, updates the PDP with the state of the TE-LSP. In response to the update, the PDP returns a QoS template indicating configured QoS guidelines the PEP must enforce for that TE-LSP. If the TE-LSP is eventually torn down, the PEP again updates the PDP with the state of the TE-LSP.

This invention provides for a technique for selectively off-loading traffic from congested sub-regions of a network to more lightly-loaded regions by making use of Multiprotocol Label Switching (MPLS). For each network element, an Interior Gateway Protocol (IGP) routing is employed to provide re-routing and to identify congested links caused by re-routed trunks for each single failure. The re-routed traffic is then analyzed and alternate Label Switched Paths (LSPs) are identified for such traffic trunks so that the traffic is directed to the alternate LSPs during the single failure event.

There is disclosed an apparatus and method for limiting tunnel traffic in a network. Traffic engineering tunnels are used to direct traffic along a predefined path, which may differ from the path that internet protocol (IP) routing would determine. Interior gateway protocol (IGP) cut through will allow the forwarding of all destinations downstream of a tunnel through the tunnel, without the operator needing to specify a forwarding equivalence class (FEC). But congestion in the tunnel and network instability may result from this approach. A solution to these problems is disclosed which limits the traffic in the tunnel to only that with destination addresses of the tunnel's egress router or nodes directly supported thereby. Other solutions are disclosed which allow tunnel traffic to nodes having destination addresses other than those being directly supported by the tunnel's egress router. All of these solutions are achieved in both pre-determined forwarding entry and dynamic packet-by packet embodiments.

The invention provides a city signal control intersection traffic state detecting and evaluating system based on data characteristic and a method and an application thereof. The system comprises a vehicle state detection unit, a control state monitoring unit, a signal collecting unit, a microprocessing unit, a data transmitting unit, a data processing unit and a traffic state display unit, wherein, the vehicle state detection unit and the control state monitoring unit are connected with the signal collecting unit in parallel; then the signal collecting unit is also connected with the microprocessing unit, the data transmitting unit, the data processing unit and the traffic state display unit sequentially; the microprocessing unit is also connected with a real time data storage unit signal; and the control state monitoring unit is also connected with a traffic signal lamp signal. The method is applicable to various traffic engineering technology activities carried out by traffic real time data analysis, and the method has the advantages of intuition, easy application, high judgement accuracy and wide application range.

A technique triggers packing of path computation requests (PCRs) for traffic engineering (TE) label switched paths (LSPs) that are sent from one or more label-switched routers (LSRs) to a path computation element (PCE) of a computer network. According to the novel technique, incoming PCRs are packed into sets in response to a certain event, and one or more TE-LSPs (paths) are computed for each PCR of a particular set based on the PCRs of that set. Specifically, the PCE detects an event in the network (“network event”) indicating that an increase in the number of incoming PCRs has occurred, or that an increase is likely to occur due to, e.g., a change in a network element. Once the net-work event has been detected, the PCE packs the incoming PCRs into configured-length sets, such as, e.g., for a specified time interval or a certain number of PCRs. The PCE computes paths for each PCR of a particular set while considering the other PCRs of that set, thereby reducing race conditions, signaling overhead, and set-up failures.

The invention discloses a vehicle type identification device and method for realizing cross-scene cold start based on transfer learning. The vehicle type recognition device is provided with three components, namely a first component, a second component and a third component, Data processing unit, a network training unit and an identification application unit, According to the invention, only a small amount of vehicle image data marked with vehicle type information exists in a target domain; A domain adaptation method of transfer learning is adopted. The parameter difference of the vehicle typerecognition convolutional neural network model between the source domain of the old vehicle type recognition scene and the target domain of the new vehicle type recognition scene is reduced, parameter migration of the vehicle type recognition convolutional neural network model from the old vehicle type recognition scene to the new vehicle type recognition scene is achieved, and cross-scene cold start vehicle type recognition is achieved. The method can be used for the initial stage of actual intelligent traffic engineering, enables the convolutional neural network model to achieve a high accuracy rate on a vehicle model identification task under the condition of lacking vehicle image data with marked vehicle model information in an actual vehicle model identification scene, and has a goodapplication prospect.

A technique dynamically restores original attributes of a Traffic Engineering La-bel Switched Path (TE-LSP) that are provided in a source domain for a destination domain when traversing one or more intermediate domains that may translate the TE-LSP attributes in a computer network. According to the novel technique, a head-end node requests an interdomain TE-LSP having one or more original TE-LSP attributes (e.g., priority, bandwidth, etc.) using a signaling exchange. The head-end node may also request restoration of the original TE-LSP attributes upon entrance into the destination domain. Intermediate domains (e.g., border routers of the domains) receiving the request may translate the original TE-LSP attributes into corresponding intermediate domain TE-LSP attributes. When the request reaches the destination domain, the intermediate domain TE-LSP attributes of the requested TE-LSP are restored into the original TE-LSP attributes.

The invention discloses a water-containing gangue compression testing device and a testing method thereof. The water-containing gangue compression testing device comprises a steel barrel for storing gangues, wherein the steel barrel is divided into a plurality of layers from the whole height; a pressure sensor and a stay wire displacement sensor are arranged on each layer; the steel barrel is put on a testing machine to be subjected to a compression test so as to obtain a compression ratio and force magnitude relation of gangues on different-height layers; the same batch of gangues are tested again, but the difference is as follows: a fixed amount of water is injected at the height of a certain layer, and a compression test is carried out; the compression ratio and force magnitude relations of the gangues before and after the water is added are compared to obtain the influences on a compression process by the moisture content of the gangues on the certain layers; by that analogy, a plurality of times of tests are carried out to obtain the influences on the compression process by the moisture content of the gangues at different-height positions. The water-containing gangue compression testing device and the testing method thereof, disclosed by the invention, not only can be used for underground engineering of gangue mining with filling and the like, but also can be used for the fields of building and traffic engineering including geotechnical side slope stability analysis, gravel foundation treatment, roadbed deformation calculation and the like.

The invention relates to an anti-dazzle principle based design method for traffic engineering facilities at a road tunnel exit. The method is characterized in that tunnel exit anti-dazzle facilities are arranged in front of the tunnel exit to ease intensive brightness transition caused by insufficient illuminating lamps at the tunnel exit; coloured painting materials of which reflection coefficients gradually reduce are arranged on the tunnel ceiling, side walls and roads from the top down to ease brightness transition and beam divergence at the tunnel exit, so as to lift the dazzle area, reduce the dazzle area below the visual line of a driver and increase the visual adaptation time; horizontal road direction lines and road lane keeping lines are arranged on the road, and side wall vertical direction lines and side wall double-layered contour marks are arranged on the side walls, so as to form a closed mid-frequency retroreflective information stream together; high-frequency red and white marked lines arranged on maintenance road edges and road side reflective raised route markers form a high frequency visual information stream to increase the driver's instantaneous velocity sensation, and promote the driver's speed feeling and distance feeling, and accordingly, the coordination and unification of the tunnel lighting energy conservation and tunnel traffic safety are realized.

The invention relates to a method for creating a post engineering information model for a railway and urban railway traffic station. Rail traffic engineering construction involves a plurality of fields and has complex links and a large amount of information, the entire process is perfected continuously with the addition and optimization of all engineering information, and the requirement on total planning of the entire process is high. The method comprises the following steps: making a single functional department create an information model of the department and establish a working set of the department; gathering the working sets of all departments onto the same working platform by sharing elevation and a shaft screen to integrate into a project working set; embedding plant feature information, design information and construction information into a system to form completion data for an operator; gradually separating the information, and constructing task flow in real time according operation for loading and outputting; and releasing cache after finishing output, and recording a log file. According to the method, various types of relevant information in a project are integrated reasonably through a parameter information model, and the created information model is shared and transmitted in a full life cycle process, so that the engineering progress is effectively optimized.

When network function virtualization (NFV) is overlaid on top of a SDN, a convergence gateway mediates between the orchestrator and the SDN controller. The convergence gateway collects from the orchestrator the information on the location, capacity, status, and usage information of all virtualized functions that run on SDN's physical platforms, and passes that information to the controller. The controller decides to optimally route a data flow for service chaining by obeying traffic engineering and quality of service policies of that data flow, choosing from available virtualized functions along that route. An information model based approach is also presented for information sharing across the orchestrator, convergence gateway and controller.

The invention relates to a lane changing identification and prediction method, system and device for extracting a vehicle trajectory based on roadside laser radar data, and a storage medium. The method comprises the following steps: (1) carrying out background filtering on a point cloud picture scanned by a laser radar; (2) clustering the point cloud data of the in-transit target; (3) classifying vehicles and people by adopting an artificial neural network; (4) tracking the same target in continuous frames; (5) predicting the lane changing behavior of the vehicle according to the threshold value of the selected evaluation index. According to the method, the lane changing or turning behaviors of the vehicle can be predicted in real time with relatively high precision, and a related vehicle lane changing early warning system can be developed by utilizing the lane changing information, so the development of intelligent traffic engineering is increased.

The invention provides a conflict-free two-phase intersection traffic organization system and a signal timing method, and belongs to the technical field of traffic engineering. By adoption of the conflict-free two-phase intersection traffic organization system and the signal timing method provided by the invention, the problem that left-turning vehicles in the existing two-phase conflict-free intersection encounters second time parking, such that the traffic benefits of the left-turning vehicles are lost, is solved. According to the conflict-free two-phase intersection traffic organization system and the signal timing method provided by the invention, by means of the timing coordination of a main signal and an auxiliary signal, left-turning, the straight-line and the right-turning vehiclesdo not encounter the second time parking problem, and the left-turning, the straight-line and the right-turning vehicles are simultaneously released at the intersection phase, thereby improving the traffic efficiency of the left-turning vehicles at the intersection; and moreover, the time difference of turning off the green lights of the main signal and the auxiliary signal is limited to preventthe vehicles from staying in a reverse right-turning lane or a straight lane between the main signal intersection and the auxiliary signal intersection, thereby avoiding the phenomenon of unstable signal control. The conflict-free two-phase intersection traffic organization system and the signal timing method provided by the invention can be applied to the technical field of traffic engineering.

The invention discloses a traffic engineering path establishing method, device and system. According to the application, the BGP is adopted to announce the distribution of the SLID among the node devices, so that various scenes including cross-domain TE path calculation and forwarding are satisfied, the depth of a label stack for message encapsulation is reduced, the message load efficiency is improved, and MTU fragmentation is avoided; and meanwhile, each SR node has a maintainable state through the SLID, so that the intermediate node and the tail node realize the identification of differentTE paths, and the state detection for different TE paths is facilitated.

The invention discloses a high-strength inorganic magnesium cement building template and a production method thereof. The building template comprises the following components (in parts by weight): 36-43 parts of magnesium oxide, 40-45 parts of brine, 7-12 parts of coal ash, 4-8 parts of fiber, 0.3-0.5 part of small expanded and vitrified balls, 0.1-0.3 part of phosphoric acid, 0.05-0.15 part of trisodium phosphate, 0.05-0.15 part of NNO and 0.2-0.6 part of ferrous sulphate. 3-6 pieces of fibreglass gridding cloth in matched specification are adopted. The high-strength inorganic magnesium cement building template can be widely applied to concrete moulding of beams, plates and columns in building engineering, concrete moulding of bridges, tunnels and highway stereo hubs in traffic engineering, concrete moulding of dams, water towers and tank bodies in hydraulic and electric engineering, and the like.

The invention relates to a pair of intelligent traffic glasses comprising a frame, a display module, a communication module, an input module, a processor module, a power supply module, and a traffic service module. The traffic service module is mainly composed of a storage sub module, a positioning sub module used for providing current position information, a data acquisition module used for acquiring command information output by the processor module and the position information of the positioning sub module, sending the command information and the position information through the communication module to a dynamic traffic FLOWSIM cloud, and then acquiring fed-back dynamic traffic data, and a data processing module used for receiving the dynamic traffic data sent by the data acquisition module, processing the dynamic traffic data and static traffic data by use of a traffic engineering model and a mathematical model to obtain final traffic data, and displaying the traffic data to uses through the display module. The problem that a portable and convenient terminal for providing traffic service lacks in the prior art is solved. The pair of intelligent traffic glasses capable of providing dynamic traffic service and convenient to use and a working method based on the intelligent traffic glasses are provided.

The invention discloses an information feedback method and a device for ensuring that a specially-assigned person performs designated work on a construction site, which belong to the field of the construction of traffic engineering. The method comprises the following steps: establishing the relationship databases of the engineering division, the safety hazard source account and the process control point corresponding to the geographic position; linking the specially-assigned person with a mobile terminal; establishing a construction site engineering identification board; initiating by the mobile terminal identification mark a work task request, wherein the work task request transmitted from the mobile terminal to the server carries the geographic position; determining by the server whether the geographic position information is consistent with the basic data or not; sending by the server the designated working information to the mobile terminal; feeding back the onsite information by the mobile terminal; and receiving, storing and organizing the information by the server.. According to the invention, man-machine linking is carried out, and the one-to-many relationship between the engineering name, the position and the working procedure is established, and an information feedback and judgment function is started by scanning and recognizing the site identification, and the purpose of ensuring that a person completes the designated work at a designated place is achieved.