244 results about "Congestion detection" patented technology

Congestion in a radio access network (RAN) associated with transporting uplink information originating from one or more mobile terminals is detected. That detected RAN congestion is reduced using any suitable technique (several examples are described) and may be implemented in one or more nodes in the RAN. One advantageous (but non-limiting) application is to a RAN that supports high speed uplink packet access (HSUPA) and/or one or more enhanced uplink dedicated channels (E-DCHs).

Prioritized random access methods are proposed. According to an embodiment, random access attempts are classified into the priority levels according to delay requirements, and adedicated random access opportunities are reserved for different priority levels. A congestion detecting mechanism is introduced for such dedicated ranging (random access) opportunities. When congestion is detected by the base station, parameters or configurations of random access can be dynamically or temporarily modified through random access response message. Furthermore, a prioritized contention resolution is introduced to guarantee a high priority access is processed earlier than a low priority access. According to another embodiment, another prioritized contention resolution is introduced to reduce the impact of random access of a low priority M2M device upon H2H traffic.

An intelligent congestion feedback apparatus and method thereof includes a source endpoint transmitting data packets, and a destination endpoint receiving the data packets, and a timer in the destination endpoint set to zero. An intermediate node detects congestion between the source endpoint and the destination endpoint. Upon congestion detection, the intermediate node marks the data packets transmitted to the destination endpoint indicative of congestion. Upon receipt of the marked data packets, the timer begins reverse counting from a preset time value to zero and a feedback loop is turned-on between the destination endpoint and the source endpoint to transmit congestion notification (CN) messages to the source endpoint contributing to the congestion.

The invention discloses a collaborative work congestion control method in the high-speed network, the transmitter detects the RTT delay information and 1-bit prediction information from the router to determine the network congestion status and the congestion window is the self-adapted and adjustable. The method of the invention combines the load factor of the network path and number of the data packets in the buffers of all routers connected in the path to adjust the congestion window of the high-speed network which can effectively adapt to the transfer characteristic of the high-speed network to guarantee the better link utilization rate of the network, friendly TCP and fair of the streaming. These two congestion information mechanisms can be fused to avoid the mistaken determination of single congestion detection mode under certain environment and reduce the direct influences of the unilateral information error on the reliability of the method.

A method and apparatus for congestion control for acknowledged communication over networks detects congestion based on trends of flight size and transmission rate in order to adapt a congestion window in accordance with a detection result. Such congestion detection enables, for example, distinguishing between the congestion with or without unfair competition. Moreover, the measured transmission rate or its trend can be filtered to compensate for time variations. An end node or a proxy can be used for congestion control.

A system and method for client network congestion analysis and management is disclosed. According to one embodiment, the method includes: collecting real-time network data; executing calculations on the real-time network data to compute performance metrics; detecting peak usage time; and detecting one or more congestion incidents, wherein a congestion incident comprises a persistence of one or more metrics over a time window that comprises detecting a proportion of metric values crossing a threshold that exceeds a defined percentage amount, detecting a time-ordered stretch of metric values that exceeds a defined threshold, or combinations thereof.

A transmission terminal has a plurality of congestion control units (RPs) each controlling a frame transmission rate. A switch arranged between the transmission terminal and a reception terminal has a plurality of congestion detection units (CPs) each generating a congestion information notification frame addressed to the transmission terminal. A plurality of routes exist between the transmission terminal and the reception terminal. The management computer manages a correspondence relationship between the routes and the RPs, assigns any of the routes to a flow, selects a RP associated with a route assigned to the flow, and notifies the transmission terminal and the switch of the flow and the selected RP. When the switch receives a frame belonging to the flow, a CP associated with the selected RP generates the congestion information notification frame addressed to the selected RP. The transmission terminal transmits a frame belonging to the flow through the selected RP.

A flow control system include a congestion detecting section and control section. The congestion detecting section detects congestion in a packet switching network. The control section is arranged in a transmitting node. When the congestion detecting section detects congestion, the control section calculates a new transmission packet rate. When the new transmission packet rate is smaller than a current transmission packet rate, the control section changes the current transmission packet rate to the new transmission packet rate after transmission of data to be transmitted to a receiving node. A flow control method is also disclosed.

The invention relates to a method and a system for preventing message congestion. The system comprises a processor, which is connected with a traffic manager and used for completing message classification, parsing, modification and encapsulation. Congestion processing is carried out according to the received congestion strategy sent by the traffic manager. The traffic manager is used for the detection of message congestion and the generation of the congestion strategy and used for sending the congestion strategy to a packet processor. According to the method and the system of the invention, the message processing performance and efficiency are improved.

Congestion control techniques based upon resource utilization information stored by a network device. According to an embodiment of the present invention, a network device is configured to identify a data source causing congestion based upon information stored by the network device identifying a set of data sources, and for each data source, information identifying the amount of a resource of the network device being used for processing data received by the network device from the data source.

The invention relates to a GPS (Global Position System) based traffic flow and road jamming detection system, comprising vehicle-mounted terminals arranged on monitoring vehicles, a server used for receiving information of the vehicle-mounted terminals and carrying out congestion calculation, wherein the vehicle-mounted terminals are in communication connection with the server through a wireless communication network, and each vehicle-mounted terminal comprises a GPS module, a first communication module, a display module and an information processing module; the server comprise a congestion state calculation module and is used for acquiring real-time traffic information through a congestion function according to coordinate information sent back by different vehicle-mounted terminals, and the congestion function is adopted for calculating congestion degrees of different rod sections, if the congestion degree is larger than a preset congestion degree threshold, a congestion state is judged to be, and otherwise, a smooth state is judged to be; and a second communication module is used for sending traffic states of different road sections to the vehicle-mounted terminals. The invention has the advantages of low cost, strong practicability and easy popularization.

The invention discloses a method, a device and a system for detection and early warning of vehicle congestion. The method comprises steps: vehicle part information in a congestion detection area in a lane corresponding to an intelligent camera in each direction of an intersection and vehicle information in a congestion early warning area are acquired; according to the vehicle part information in the congestion detection area in the corresponding lane and the vehicle information in the congestion early warning area, the vehicle driving state in the congestion detection area in the corresponding lane is judged, and a judgment result is outputted; and the judgment result is comprehensively analyzed and processed, and then the congestion early warning information is sent to a display screen in each direction of the intersection. Through comprehensively analyzing the vehicle part information in the congestion detection area and the vehicle information in the congestion early warning area, the vehicle driving state can be judged more accurately, and through sending the congestion early warning information to the display screen in each direction of the intersection, the congestion state can be fully known in each direction of the intersection, and the congestion time is thus reduced.

The invention is applicable to the field of data communication and provides a method and a system for network congestion management. The network comprises a core network entity with a congestion detection function and an upstream network entity capable of responding to congestion notification information. The invention is characterized in that the method comprises the following steps: the core network entity sends the congestion notification information to the upstream network entity when detecting the congestion situation; the upstream network entity reduces the data transmission rate by a certain step value according to the received congestion message information and resets a timer or a counter for counting the number of data packets; and the timer or the counter triggers the upstream network entity to enter a rate recovery stage when overflows. When the timer or the counter overflows, the upstream network entity increases the data transmission rate and reduces the waste of the network bandwidth.

The invention relates to a method for guaranteeing Ad Hoc network MAC layer QoS on the basis of IEEE802.16. The method comprises a resource scheduling method, a reserving method and a congestion detecting method according to the characteristics of an Ad Hoc network and on the basis of MAC layer QoS guarantee frame under an IEEE802.16 Mesh mode. The resource scheduling method which is designed by the invention takes the influence of a multi-hop network on real time service delay into account, the priority level of real time services is improved, and the refused possibility of the real time services due to overtime transmission is reduced. The method dynamically changes the resource reservation step-length according to the service request conditions and solves the problems that an original DSA algorism changes resource reservation with fixed step-length and service demands can not be satisfied in time, thereby increasing the slot efficiency. The adoption of the congestion detecting method enables an authorized node to detect the congestion states of the network in time, and certain measures can be adopted.

The system thereof comprises a communication control module and one or more multi media processing modules connected to the said communication control module through management control interface. The multi media processing module comprises a packet transceiver and a congestion detection module. The communication module comprises a congestion state management module and a calibration operation module. The method thereof includes: determining the traffic flow direction required by the communication service; accessing the congestion management module to get the congestion state information about the traffic flow; in term of predetermined strategy and congestion level information, executing, admitting or refusing the operation of communication service.