59 results about "Traffic flow management" patented technology

Systems and methods which provide a scheduled media access control (MAC) architecture are shown. Scheduled MAC architectures provided according to embodiments result in a one function-at-a-time approach, wherein stations are provided parallel process media access. A communication framework is established for communication among stations, wherein the communication framework preferably defines how to request to access, how to send data frames, and/or how to terminate a session in terms of functional intervals. The functional intervals are preferably arranged in such a manner that the fairness, throughput efficiency, contention, traffic flow management, and latency are considered. A super frame structure is preferably defined from the various functional intervals. The scheduled MAC architecture could co-exist with other MAC protocols such as those based on carrier sensor multiple access schemes.

Admission of rapidly varying traffic flows to a communications network is controlled by sampling the traffic flows each at an ingress, and sampling an aggregate flow of said flows at some or all of the resources used by the aggregate flow. From this sampling, a mean bandwidth requirement for each traffic flow and a measure of the variance from that mean are determined. First and second prices for the mean and variance components of the controlled traffic flows that are calculated. These price calculations are used to determine an admission cost for each said flow so as to regulate the admission of that flow via a feedback price mechanism.

Various techniques are disclosed for managing traffic flow for transport over a plurality of communication channels of a shared access cable network. According to various embodiments, one or more devices of the cable network (such as, for example, a Cable Modem Termination System (CMTS)), may be operable to implement at least a portion of the traffic flow management techniques. In at least one embodiment, one or more aspects of the traffic flow management techniques disclosed herein may be used for performing real-time shaping of traffic flows across multiple different channels of a DOCSIS channel bonding group. In some embodiments, various different traffic shaping and/or traffic scheduling techniques may be employed (e.g., in DOCSIS 3.0 compatible cable networks) to reduce and/or mitigate issues which, for example, may arise as a result of an inability to represent traffic schedulers as tree-based hierarchies. Other aspects are disclosed for implementing quality of service (QoS) procedures on shared access network(s), such as for example hybrid fiber/coaxial (HFC) cable networks.

Various techniques are disclosed for managing traffic flow for transport over a plurality of communication channels of a shared access cable network. According to various embodiments, one or more devices of the cable network (such as, for example, a Cable Modem Termination System (CMTS)), may be operable to implement at least a portion of the traffic flow management techniques. In at least one embodiment, one or more aspects of the traffic flow management techniques disclosed herein may be used for performing real-time shaping of traffic flows across multiple different channels of a DOCSIS channel bonding group. In some embodiments, various different traffic shaping and/or traffic scheduling techniques may be employed (e.g., in DOCSIS 3.0 compatible cable networks) to reduce and/or mitigate issues which, for example, may arise as a result of an inability to represent traffic schedulers as tree-based hierarchies. Other aspects are disclosed for implementing quality of service (QoS) procedures on shared access network(s), such as for example hybrid fiber/coaxial (HFC) cable networks.

The invention relates to a method and system generating traffic information and providing relevant services. Based on all kinds of radio terminal, especially radio terminal with positioning ability, it gets the location information of the customer terminal, based on the terminal running speed to further estimate the average speed and traffic flow on the road. Based on these estimation and collected information, executing personalized traffic information inquiry service with quantized result to select the road service, traffic flow management service together with traffic lights control and road status denoting system update.

A system and method for management of network traffic flow for one or more networks of interconnected computing devices, including predicting one or more types of network traffic data flows using a Machine Learning (ML) classifier, and updating the ML classifier according to identified changes in the network traffic data flows. Using software-defined-networking (SDN) tools and an updated ML classifier, training data is generated to formulate accurate new predictions of the one or more types of network traffic data flows. Network traffic flow is regulated based on the generated new predictions.

An internetworking device that provides improved immunity to Denial of Service attacks, and in general, improved Quality of Service (QoS). An internetworking element or other route processor is composed of two main parts, including a data forwarding plane and a control plane; the control plane runs routing, signaling and control protocols that are responsible for determining the packet forwarding behavior by the data plane. Independent control plane processes may be provided; however, they are considered to be a single network entity that is a uniquely addressable port. Packets thus intended for the control plane always pass through a designated point. As a result, a set of port services unique to the control plane may be applied to the control plane port. These control plane port services thus can be utilized to control all packet traffic entering and exiting the control plane processes as a whole.

A method is provided for traffic lane and traffic signal control identification and traffic flow management. Methods may identify traffic lights controlling lane movements, cataloging the information through analysis of traffic light signal phase and timing, and analyzing traffic movement through an intersection during specific periods of time. In particular, example methods may include identifying each of a plurality of paths through an intersection; identifying states of one or more traffic lights controlling traffic through the intersection; determining vehicle throughput data for the intersection through a predetermined number of cycles of the one or more traffic lights; and matching the vehicle throughput data to each of the plurality of paths of the intersection. The method may optionally include identifying times of movement and times of non-movement of vehicles across the intersection for each of the plurality of paths.

A method for managing traffic flow on a roadway includes upon meeting a condition, changing a number of traffic lanes from a first number to a second number across a given width of the roadway.

The invention relates to a PTN traffic flow management method, which comprises the following steps: 1, in a network management server, a corresponding port of a certain service is set to be in an acquisition state, and an acquisition time interval and an acquisition time period are set; 2, the server acquires the real-time traffic flow data of the port set in an acquisition state according to the acquisition time interval in the acquisition time period; 3, network element equipment feeds the real-time traffic flow data back to the server to store the real-time traffic flow data; 4, a webmaster client acquires the name of the network element equipment, the name of the port set to be in the acquisition state, the source port and socket port of a service of which the real-time traffic flow data are already acquired from the server; and 5, the webmaster client displays a PTN end-to-end service of which the real-time traffic flow is acquired on a display interface. The method of the invention realizes the real-time monitoring of the real-time traffic flow change in the ports of PTN equipment, can manage the real-time traffic flow change at any time, and can display the real-time change from a maximum traffic flow to a minimum traffic flow.

A method of traffic flow management at a terminal is described which comprises establishing a remotely accessible database containing a schedule of time-slots available for delivering or picking-up containers from a terminal with a truck. The schedule is accessible to trucking operator who can modify the schedule to mark individual time-slots as reserved. Once a time-slot is reserved, it is identified as such so that the time-slot ceases to be available to other trucking operators. The database also stores contact data to enable messages relating to a reserved time-slots be sent to a truck driver.

The invention addresses the disadvantage of automated vehicle traffic management systems by providing a solution for predicting and avoiding traffic congestion before the congestion is experienced. The invention includes a decentralized mechanism for predicting congestion. An exemplary embodiment of the invention uses a system of sensors to determine current traffic flow; the sensors communicate their state to a network of servers and then an algorithm is applied to the collected data to predict traffic congestion; upon detection of congestion, signals are communicated to the system controllers to prevent the traffic congestion.

An invention regarding traffic flow management “Fast Lane On Warning” (FLOW) is disclosed whereby individual vehicles are informed and told what speed to go in order to pass through a traffic signal while the light is green. A FLOW (“fast lane on warning”) director sequencer works in conjunction with a traffic signal sequencer (commonly known in the art), both of which have the same service cycle period Pi. The (RGY) type phases and FLOW readout phases are set for each unique particular intersection. While the traffic sequencer controls repeating RGY cycles, the flow director sequencer instructs, generates, transmits repeating cycles of changeable readouts on one or more roadside unit (RSU) emplacements positioned up the road from the traffic signal for one or more lanes in one or more directions. These changing speed assignments or readouts, individually perceived by motorists, guide in motorists such that by the time they pass through the intersection, they will do so while the traffic signal is green, regardless of any random pattern of traffic individual motorists may have been in as they approached the emplacements.

The invention discloses an expressway congestion state judgment and traffic flow management and control system and method, and belongs to the field of intelligent traffic management and control. The system comprises a data acquisition module, a data processing module, a back-end service module and a front-end display module. According to the invention, the road congestion state is divided into three types, i.e., no congestion, no serious congestion and more serious congestion, and the traffic congestion index is calculated in combination with the traffic parameters, such as speed, occupancy and traffic flow, acquired by a system detector; the calculated data are compared with a specific threshold value to obtain an initial pre-judgment result; in order to reduce the misjudgment rate and realize accurate judgment, the system maintains the continuity of detection and carries out pre-judgment for multiple times, and finally completes one-time traffic congestion state evaluation; and finally, vehicle management and control are carried out on an entrance ramp by adopting a hierarchical flow control method so as to relieve the traffic pressure of an expressway main line. According to the method, the traffic congestion state of the expressway can be accurately pre-judged, so that hierarchical flow control is better realized.

The invention discloses a CAV lane change decision-making method for an off-ramp diversion area of an expressway based on an automatic driving special lane deployment scene. The method comprises the following steps: a forced lane change scene is constructed; the existence probability of the four types of vehicles when the mixed traffic flow is in a balanced state is calculated, the traffic volume of the automatic driving special lane and the traffic volume of the universal lane are calculated based on a lane management strategy, and mixed traffic flow operation conditions are constructed; and the CAV selects to change the lane when the cost function value J of the CAV lane change model is minimum. According to the CAV lane change decision-making method, the influence of CAV driving away from the CAV-L on the traffic state is analyzed, the CAV lane-changing intention generation point position and the lane-changing decision-making model are established, and the research result provides important technical guidance for future expressway mixed traffic flow management, and a theoretical basis is provided for deployment and landing of the automatic driving special lane of the expressway.

The invention discloses a traffic flow detection control method, and the method comprises a traffic flow detection control system and a centimeter-level setting scheme. The traffic flow detection control system comprises a central control unit which is used for the regional traffic flow management; a local control unit which is used for the traffic flow management of a current road intersection; alane detection equipment module which is used for detecting a vehicle in a motor vehicle lane; a first wireless signal receiving and transmitting module which is used for receiving the data of the detection equipment module; and a wireless signal transmitting module which is used for transmitting a main unit control instruction. The method can achieve the coordinative control of the signal lampsand an LED prompt information display screen at each road intersection according to the traffic flow conditions of all roads, facilitates the control and guide, enables the vehicles to continuously move, avoids the frequent start/stop of the vehicles, improves the traffic efficiency of the roads, avoids the congestion of the roads, and avoids the potential safety hazards caused by the road scramble.

The invention relates to a city impedance calculation method based on points of interest, comprising the following steps: (1) acquiring data of points of interest in a city from an Internet medium, including the name, type, latitude and longitude positions and operation time data of each point of interest; (2) sorting the operation time data of the points of interest, and outputting a standard format; (3) using city road network data to mark out plot units and determine the center of each plot with a polygon completely closed by a road system in the city as the basis, and mapping the points of interest to the corresponding plot units based on the latitude and longitude positions; (4) planning the routes from the center of each plot to all the points of interest within the reachable range, and obtaining route parameters; and (5) calculating the impedance value corresponding to each plot unit in the city according to the route planning result by considering the route parameters and population parameters in the corresponding plot unit. The method is beneficial to quantifying the impedance values of different plots of a city in different periods of time, thus providing reference for traffic management and urban land use planning.