88 results about "Network performance degradation" patented technology

A method for real time video transmission over networks with varying bandwidth is described. Image quality is maintained even under degrading network performance conditions through the use of image scaling in conjunction with block based motion compensated video coding (MPEG2 / 4, H.264, et. Al.). The ability to quickly switch resolutions without decreasing reference frame correlation is shown enabling a fast switch to reduce the required bandwidth for stable image quality.

A method of measuring, for communication paths between a networked computer and at least one other networked computer connected via a network performance, network information to detect network performance degradation and diagnose source(s) of the performance degradation. The diagnosis may be performed by a progressive elimination of possible sources. Network performance degradation may be attributed to problems at a local network or the Internet. The problem sources on the Internet may comprise, for example, an internet server provider (ISP) or a single remote server in communication with the networked computer. A network performance baseline established and maintained for each path may be employed in diagnosing the network performance degradation.

The invention discloses a wireless network deployment method and a wireless access point, and the method comprises the steps of using one wireless access point (AP) and more than one wireless controller (AC) for respectively establishing tunnel connection, leading the AP to independently download and maintain a set of AP configuration for each tunnel, constructing the corresponding basic service setting (BSS) for each tunnel, providing wireless network services through the BSS, determining a forwarding tunnel according to an ID of the BSS of a wireless terminal when the AP receives uplink dataof the wireless terminal and sending the forwarding tunnel determined through the uplink data to the corresponding AC. The method and the wireless access point lead one AP to be capable of establishing the connection with a plurality of AC, thereby avoiding the network performance degradation due to that a plurality of operators repeatedly deploy the AP in the same region.

The method includes following steps: a master ring is selected from more than two EAPS rings contained by EAPS intersecting rings; there is a main station in the master ring; other EAPS rings are defined as slave rings; there is a main station in each slave ring; the setting results above are saved in each station at intersecting point on the EAPS intersecting rings; after the stations at intersecting point detects a fault on sharing route, it transmits alarm notice to the main station on the master ring and the stations on slave rings; after receiving the alarm notice, the main station on master ring makes protection switching, and the slave station makes self shielding for not making protection switching.

The embodiment of the invention discloses a method and device for network adjustment. The method includes the steps that the corresponding relation between the number of occupied network resources and the service volumes of various types of services of the network resources is obtained; according to the corresponding relation and predicated service volumes of the various types of services, the predicated occupied quantity of the network resources is determined; according to the predicated occupied quantity of the network resources, the available quantity of the network resources is adjusted. According to the embodiment, a reasonable network adjustment plan can be performed according to predicated demand conditions of future resources, so that a network operator obtains optimal return with reasonable investment, and the problems that due to constraining of the network resources, the network performance is reduced, and due to idling of the network resources, the rate of return on investment of the operator is reduced are avoided.

Network survivability is quantified in such a way that failure cases can be compared and ranked against each other in terms of the severity of their impact on the various performance measures associated with the network. The degradation in network performance caused by each failure is quantified based on user-defined sets of thresholds of degradation severity for each performance measure. Each failure is simulated using a model of the network, and a degradation vector is determined for each simulated failure. A comparison function is defined to map the degradation vectors into an ordered set, and this ordered set is used to create an ordered list of network failures, in order of the network degradation caused by each failure.

The method includes following steps: step S202, configuring delayed processing time in use for link recovery on main node of Ethernet ring; the delayed processing time is valid for main node only; step S2024, when failure occurs on link, main node and transmission node registers state of link as state of failure, and corresponding process carries out; step S206, when link is recovered, main node processes link switching in delayed time based on delayed processing time. The method prevents multiple times of switching in EAPS short time cause by quick oscillation of link, and unsuccessful operation of EAPS on hardware, and descendent network performance. Moreover, the invention raises capability of resisting fault of Ethernet ring under complex link oscillation.

Provided is a method and apparatus for controlling congestion of a node in an ad-hoc network comprising: classifying a channel state into a busy channel state and an idle channel state and then monitoring the channel state; performing contention for acquiring a channel with neighboring nodes when data to be transmitted is present during the monitoring of the channel state; calculating an available bandwidth on the basis of the channel state when wins the contention; and determining the amount of data to be transmitted on the basis of the available bandwidth. The nodes in the ah-hoc network monitor their own wireless channel state so as to obtain channel contention information, calculate an available bandwidth from the channel contention information, and control a transmission amount on the basis of the available bandwidth. Accordingly, the nodes can avoid excessive traffic which exceeds channel capacity. Channel contention, which is the most immediate and important cause of a decrease in network performance, can be loosened.

The invention discloses a TCP friendly rate control method based on the change rate of handling capacity and an ECN mechanism. ECN marking is conducted on an interchanger first. A receiving party decides whether an ECN-echo position should be arranged for ACK sent by the receiving party according to the state of an ECN marking position in received data package. A sending part maintains a virtual sending window win, calculates the change rate of the handling capacity, adjusts the virtual sending window win according to the state of the ECN-echo position in received ACK and the dynamic conditions of the change rate of the handling capacity, and finally calculates a new sending rate according to win. The method comprehensively considers the characteristics of a data central network and the characteristics of a wireless network, can relieve the TCP Incast phenomenon of the wired data central network, and prevents network performance from descending due to wireless packet loss. Consequently, the method can be used in the wired data central network and the wireless network.

The present invention is related to a network clustering device and a method for expanding communication coverage and increasing network capacity by mutually connecting homogeneous or heterogeneous wireless mobile communication networks. By including a plurality of RF transceiver units and a network performance measuring unit, various frequency bands already occupied by surrounding wireless mobile communication networks are coordinated with the network clustering device to avoid frequency interferences among networks, to expand the communication coverage of the homogeneous or heterogeneous wireless mobile communication networks with ease, and to prevent a degradation of a network performance.

The present disclosure describes systems and methods that provide a hybrid framework for augmenting statistical anomaly detection with contextual features, machine learning and human Subject Matter Expert (SME) input to learn significant characteristics of true anomalies for which alerts should be generated. The framework presented herein is domain agnostic and independent of the underlying statistical anomaly detection technique or the machine learning algorithm. The framework described herein is therefore applicable and adaptable to a number of real world service provider systems and applications, such as, for example, detecting network performance degradation in a service provider network or detecting anomalous conditions from data received from a sensor while filtering out false positives.

A computing system and an exclusive access control method are provided for preventing degraded performance of a network caused by exclusive access control, and for permitting a computer to exclusively access a storage area irrespective of whether a storage has an exclusive access control function. In the computing system in which a plurality of computers and an external storage device storing shared data are connected through a relay, exclusive access control is executed by a device other than the storage. Specifically, the relay having a virtualizing function is instructed to execute exclusive access control. The relay has information indicating whether a storage area on the storage is an exclusive access area, so that the relay determines based on this information whether an access request received from a computer requests an access to an exclusive access area, and executes exclusive access control when it is an access request.

The system, method and apparatus for securing network data of the present invention provide security for internal networks by utilizing a common storage element for the exchange of data between the external and internal components, without creating a concurrent session between the external and internal components. In addition, when the protocol of the external network is Internet Protocol (IP), the protocol used for the internal network may be a non-IP messaging protocol that is a more secure protocol than IP, and insulates the internal network from the type of attacks that are common in IP networks. These security measures may be implemented without a significant change to the hardware or software elements of the internal or external networks, and, therefore, without adding significant cost to the network administration and without the network performance degradation that is characteristic of conventional security measures.

A traffic analysis and flow-based dynamic access control system and method. The flow-based dynamic access control system for controlling a user's access to an internal communication network through an external communication network includes an access control unit operating in an access control mode in which traffic received from a user is basically blocked, generating state management information of a flow, which is received from the user, based on a specified packet of the flow, and verifying whether access of the flow to the internal communication network is a normal access. As a proactive defense concept of allowing only normal users to access an internal network, a method of blocking attacks from a system contaminated by a worm virus, detecting a cyber attack on a certain system in advance and automatically avoiding the cyber attack, and guaranteeing the quality of normal traffic even under cyber attacks without performance degradation of the internal network is provided.

The invention provides a method and a device for processing a reference signal, and relates to the technical field of communication. The problem that the data cannot be transmitted effectively and network performance is reduced is solved, wherein the problem is caused by unsuitable processing of the reference signal. The method for processing the reference signal comprises the following steps: receiving at least two channel state indication reference signal (CSI-RS) configurations sent by a receiving station, wherein the at least two CSI-RS configurations are respectively comprise corresponding CSI-RS resource information, and CSI-RS power information of the CSI-RS configurations; confirming corresponding feedback information corresponding to the CSI-RS configurations according to the CSI-RS power information; and sending feedback information. The method and the device for processing the reference signal are applied to data transmission in a wireless communication system.

The invention discloses a method and a device for ZESR and STP hybrid networking to realize service interconnection; wherein, the method comprises the steps of: a configuration step, configuring all nodes of ZESR domains to cause the nodes to pertain to the same ZESR domain and enabling the ZESR protocol; an establishing step, enabling the STP protocol for all nodes in a ZESR and STP hybrid network and establishing ZESR protocol protection examples by utilizing the STP protocol; an abandoning step, the STP protocol abandoning the management of ZESR ports under the ZESR protocol protection examples and leaving the management to the ZESR protocol. The method and the device of the invention effectively fulfill the service interconnection in the ZESR and STP hybrid network, efficiently prevent problems happening to closed loops, therefore, radically avoiding the reduction of network performance or the paralysis of network as a result of closed loops, the invention also enlarges the application scope of ZESR networking, guarantees reliable service and stable operation and improves the quick recovery ability of ZESR under the situation of complex network topology.

The invention relates to the field of network communication. In order to solve the problems of high network construction cost and network performance degradation due to too many network layers during building a multimedia service access network in a sparsely populated rural area, the invention provides a network system applied in the rural area and a service message transmission method. The service message transmission method mainly comprises the following steps of: replacing virtual local area network labels of a user interface with target virtual local area network labels by access switchboards according to a preset mapping relation; and packaging service messages output by all the access switchboards in a next network with the corresponding outer-layer virtual local area network labels by a second-stage gathering switchboard according to a preset rule and forwarding to a BRAS (Broadband Remote Access Server) to realize service access. The network system and the service message transmission method have the advantages that: high-quality triple play service transmission can be realized only by configuring village node switchboards with relative low performance in a user access node area, thereby the network construction cost is reduced.

A system and method is disclosed to dynamically alter service offerings to a user based on the available network resources. As network resources are diminished, the end user will see less available services so as to avoid diminished network performance. If network performance improvements, the system detects the improved network recourse availability and provides more offerings to the end user.

The invention discloses a method for dynamically setting a minimum node contention window value according to retransmission frequency, which mainly solves the problem that the network performance is lowered because the minimum contention window value is statically set in the prior art. The method comprises the following implementation steps: (1) transmitting a current data packet through a node, and recording the retransmission frequency with transmission success; (2) comparing the recorded retransmission frequency with two set threshold values, when the retransmission frequency is smaller than the first threshold value, setting the minimum contention window value as a default minimum contention window value in a communication standard; when the retransmission frequency is larger than the first threshold value and smaller than the second threshold value, setting the minimum contention window value to be alpha times that of the default minimum contention window value in the communication standard; when the retransmission frequency is larger than the second threshold value, setting the minimum contention window value to be beta times that of the default minimum contention window value in the communication standard; and (3) continuing to contend channels through the nodes after the minimum contention window value is set. According to the mode, the time delay of node transmission data is reduced, and the performance of the communication network is improved.

The present invention is related to a network clustering device and a method for expanding communication coverage and increasing network capacity by mutually connecting homogeneous or heterogeneous wireless mobile communication networks. By including a plurality of RF transceiver units and a network performance measuring unit, various frequency bands already occupied by surrounding wireless mobile communication networks are coordinated with the network clustering device to avoid frequency interferences among networks, to expand the communication coverage of the homogeneous or heterogeneous wireless mobile communication networks with ease, and to prevent a degradation of a network performance.

The present invention relates to a spectrum switching method based on a reputation system in a cognitive heterogeneous wireless network. For the problem that selfish or malicious behaviors of secondary users in a spectrum switching process cause degradation of network performance, firstly, the behavior of a secondary user after accessing a channel is evaluated by extracting user behavior characteristic information, a reputation value is determined according to the behavior of the secondary user, and a reputation system is established on a cognitive base station; secondly, the secondary user isranked according to a reputation status of the secondary user, and a licensed channel or a channel of an ISM frequency band is allocated to the secondary user according to the ranking situation of the secondary user; and finally, in a process of accessing a licensed spectrum, when a requirement for a waiting delay of a user is met, the secondary user with a high reputation value has a higher access priority. A simulation result shows that the method can effectively improve system throughput, reduce probability of switching and interruption, reduce the chances to access the licensed spectrum by secondary users with low reputation, and improve system security.

A bus-based optical network system comprising optical fibers, optical line terminals (OLTs), and a plurality of optical network units (ONUs) is revealed. The OLT consists of the near part (OLTN) and the far part (OLTF). Optical fibers respectively form the transmitting and receiver buses (T Bus and R Bus) with the technique of time-division multiple access (TDMA). The slot flows on both buses are in opposite directions. The OLTN performing traffic control is situated in or near a central office (CO) while the OLTF is far from the CO. ONUs, whose MAC performs traffic control, connect with two buses and share their bandwidth. The MAC with traffic control keeps the performance of the network from degradation. The required numbers of COs and optical fibers for establishing the bus-based network are so smaller that the cost of the network can be significantly reduced.

Provided is a method and apparatus for controlling congestion of a node in an ad-hoc network comprising: classifying a channel state into a busy channel state and an idle channel state and then monitoring the channel state; performing contention for acquiring a channel with neighboring nodes when data to be transmitted is present during the monitoring of the channel state; calculating an available bandwidth on the basis of the channel state when wins the contention; and determining the amount of data to be transmitted on the basis of the available bandwidth. The nodes in the ah-hoc network monitor their own wireless channel state so as to obtain channel contention information, calculate an available bandwidth from the channel contention information, and control a transmission amount on the basis of the available bandwidth. Accordingly, the nodes can avoid excessive traffic which exceeds channel capacity. Channel contention, which is the most immediate and important cause of a decrease in network performance, can be loosened.

The invention provides a three-dimensional U-Net brain tumor segmentation method fusing conditional randomness and residual errors. The three-dimensional U-Net brain tumor segmentation method comprises the steps: carrying out the three-layer cascade network architecture training of a training set, and obtaining a model of a convolutional neural network; testing the test set through a convolutionalneural network model to obtain a probability matrix corresponding to each category of the brain tumor; and carrying out post-processing on the probability matrix, and updating the probability to obtain a final brain tumor segmentation result. The three-dimensional U-Net brain tumor segmentation method simplifies the problem step by step, and obtains a better effect. compared with a traditional method, the three-dimensional U-Net brain tumor segmentation method has more advantages that the adopted network has better learning ability, and a residual block is introduced to reduce the influence of gradient explosion, gradient disappearance and network performance degradation caused by deepened network layers; and information of a three-dimensional space is used to the greatest extent.

The invention discloses a method and a system for voice and video user rate consultation, and is used for overcoming technical defect that the network performance is reduced because the wireless network load is not considered in user rate consultation in the process of establishing a call. In the invention, a base station participates in the user rate consultation process of the call, an operator can make the wireless network load influence the user rate consultation through configuration of the base station so as to optimize the network performance.

The invention discloses a model updating method, a model updating device and a model updating system, which are used for solving the problem of network performance reduction caused by model performance reduction in the prior art. The method comprises the steps that a first functional entity sends a model updating strategy to a second functional entity, the model updating strategy comprises updating conditions of a model of a first network element, and the model of the first network element is used for guiding parameter adjustment of the first network element; when the first functional entity receives an updating request, a process of updating the model of the first network element is executed, wherein the updating request is triggered when the second functional entity determines that the model meets the updating condition, the first functional entity can be an analysis and modeling function AMF entity, and the second functional entity can be an intelligent collaborative function APF entity or a model execution function MEF entity.