3030 results about "Backbone network" patented technology

A packet forwarding method for optimizing packet traffic flow across communications networks and simplifying network management. The invention provides look-up-free and packet-layer-protocol transparent forwarding of multi-protocol packet traffic among Layer-N (N=2 or upper in the ISO OSI model) nodes. The invention enables flexible and efficient packet multicast and anycast capabilities along with real-time dynamic load balancing and fast packet-level traffic protection rerouting. Applications include fast and efficient packet traffic forwarding across administrative domains of Internet, such as an ISP's backbone or an enterprise virtual private network, as well as passing packet traffic over a neutral Internet exchange facility between different administrative domains.

A method of controlling call admission within a system comprising a plurality of media gateways (8, 9) interconnected by a packet switched backbone (5). The method comprises, at least one media gateway (8, 9), monitoring the level of congestion suffered by incoming packets to that gateway from each other media gateway over said backbone. Following receipt of a request for a media gateway (8, 9) to terminate a bearer extending over said backbone (5) from a peer media gateway, making a decision on the admissibility of that request based upon the previously monitored level of congestion suffered by incoming packets from that peer media gateway.

The present invention provides network interface monitoring and management that may be employed with link aggregation technologies. Multiple network interfaces may be aggregated into a single bond and data may be transferred to and from a backbone network via this aggregated bond. A link aggregation monitor employs a heartbeat generator, sniffer and data store to keep track of health and availability of network interfaces. The heartbeat generator sends heartbeats to the network interfaces, which pass the heartbeats around in a token ring configuration. If a network interface fails or otherwise goes offline, detection of this condition causes the monitor and heartbeat generator to prepare new or modified heartbeats so that data may be efficiently and accurately routed around the token ring and health of all remaining alive interfaces can be monitored properly. If a network interface re-enters or is added to the aggregate bond, new/modified heartbeats are then employed.

The disclosed I-CBTC mobile closed train operation control system applies wireless communication way to transmit information between ground control center and train, and comprises an ATS or CTC system, a DSU system, a CI system, a ZC or RBC system, a VOBC system, a dual-ring redundant backbone network COM_network system, a ground-train redundant wireless network DCS system, and interfaces among nodes. This invention normalizes and standardizes former function, performance index and interfaces, and reduces cost greatly.

In a wireless network system having a wired backbone network with two or more sub-networks, each having one or more access points for communicating with wireless units via a wireless transmission medium, a system, apparatus and method for a wireless unit to determine whether a candidate access point is on a different sub-network than its current access point. If the wireless unit determines that the candidate access point is on a different sub-network, then the wireless unit releases its current network protocol address which was valid for the current sub-network, and obtains a new network protocol address valid for the new sub-network. This is accomplished by the candidate access point transmitting a multicast packet that includes the network protocol address of the access point and the subnet mask of the sub-network which the access point is on. By receiving this multicast packet, the wireless unit can determine if the candidate access point is on a different sub-network than its current sub-network. Also disclosed is a technique for a wireless unit to determine whether to roam to a candidate access point based on the signal qualities to its current and candidate access points, and whether the candidate access point is on a different sub-network or a designated restricted sub-network.

The invention discloses a layered distributed cloud computing architecture and a service delivery method. The architecture is composed of a core cloud, an edge cloud and a terminal. The core cloud is a cloud computing service center composed of servers with powerful storage and computing capacity; the edge cloud is composed of server nodes distributed in different networks and regions and is connected with the core cloud by backbone network, and the terminal is an entity which uses a cloud computing service provided by the core cloud and edge cloud. The core cloud and the edge cloud work together to provide the cloud computing service for terminal users and uses relevance of data transmitted by the core edge and the terminal to process the data so as to reduce traffic. In the invention, network flow in most of cloud computing is confined to the local network between the edge and the terminal, thus lowering traffic of the backbone network, effectively avoiding the problems of network congestion, high latency and the like in the existing centralized cloud computing mode and improving user experience.

The invention relates to a method allowing dynamically networking among a plurality of devices to share resource. It includes: installing a software of dynamic networking and resource sharing on each of devices to realize dynamic networking and resource sharing. These devices periodically announce information with multicasting. A device serves as node control device, and announces the message of the existence of the device through multicasting, creates a node. A device can find the node by monitoring announcement message from the node. The device which requests to join into the node device registers its service information that can be provided by the device to the node control device. The device which has joined into the node finds the device providing service by indexing the nodal control device, and obtains desired service from the device by sending a service calling information. The method is applied to home backbone network for performing networking in home network. Then a topology connection structure with master/slave and peer-to-peer modes can be realized. The dynamic networking and resource sharing between the service providing device and the service utilizing device in the home backbone network can be realized.

A method of setting up a call between first and second nodes of a communication system, said call extending across at least one circuit switched access network and a packet switched backbone network, the networks being interconnected by at least one Media Gateway. The method comprises, at a control node, obtaining ftoin a Home Subscriber Server the identity of a Media Gateway Control Function controlling that Media Gateway which will terminate the call within the circuit switched access network. The first node calls an access number notified to it by the Media Gateway Control Function, and as part of the call set-up procedure the identity of the Media Gateway selected to terminate the call is communicated to the Media Gateway Control Function.

A wireless network in a communication infrastructure has a packet switched backbone network and includes a plurality of access points and services a plurality of client devices. The plurality of access points communicatively coupled to the packet switched backbone network and each have access point processing circuitry and access point wireless transceiver circuitry. The plurality of client devices each have client processing circuitry and client wireless transceiver circuitry. A client device of the plurality of client devices, using respective client processing circuitry and respective client wireless transceiver circuitry, determines interference parameters regarding wirelessly communicating within the wireless network. The client device then transmits the interference parameters to an access point of the plurality of access points. The access point of the plurality of access points, using respective access point processing circuitry and respective access point wireless transceiver circuitry, receives the interference parameters and alters wireless interface operations within a service area of the wireless network based upon the received interference parameters.

A network security system is deployed between an internet backbone and intranets that belong to subscribing organizations. The system includes a scanning system that scans incoming electronic mail for malicious code and an anti-virus server for downloading anti-virus code to clients on the intranets. A switch is provided for directing incoming electronic mail from the internet backbone to the scanning system so that the electronic mail can be scanned. In one embodiment, a decoy server is also provided for masquerading as a legitimate server and logging suspicious activity from communications received from the internet backbone.

The invention enables an LSP or embedded LSPs to be mapped directly to an SPVC and carried over the ATM network. A unidirectional SPVC is established by associating it to a particular ingress LSP at the SPVC source endpoint on a multi-service switch, and to an egress LSP on the SPVC destination endpoint on another multi-service switch. The information necessary to establish the SPVC is appended in the SPVC setup message and includes LSP specific information such as the far end router ID and LSP label information, be it transport label or the full label stack. The information in the modified setup message is then used by the destination endpoint to find and connect the SPVC to the correct LSP. Incoming traffic from the LSP is switched to the SPVC at the source endpoint. The SPVC carries this traffic through the ATM network, and then the traffic is switched to the egress LSP when it emerges from the ATM network at the destination endpoint.

The invention relates to a stratification characteristic analysis-based method and an apparatus thereof for on-line identification for TCP, UDP flows. The method comprises the following steps that: an off-line phase determines a common port number of a first layer to-be-identified service type and a characteristic field of a second layer to-be-identified service data flow through a protocol analysis; a port number and characteristic field database is constructed; meanwhile, a third layer Bayesian decision tree model is obtained by training by employing a machine study method; and service type identification on a flow is completed by utilizing the characteristic database and a study model at an on-line classification phase. In addition, the apparatus provided in the invention comprises a data flow separating module, a characteristic extraction module, a characteristic storage module, a characteristic matching module, an attribute extraction module, a model construction and classification module and a classification result display module. According to the embodiment of the invention, various application layer services based on TCP and UDP are accurately identified; moreover, the identification process is simple and highly efficient; therefore, the method and the apparatus are suitable for realization of a hardware apparatus and can be applied for equipment and systems that require on-line flow identification in a high speed backbone network and an access network.

The invention discloses a target detection method based on a dense connection characteristic pyramid network, and relates to the image processing and computer vision technology. The method comprises the steps of collecting an image data set labeled with a target bounding box and category information; constructing a dense connection feature pyramid network containing a Squeeze-Exciton structure capable of learning a dependency relationship between feature channels as a feature extraction backbone network; alternately training the RPN subnet and the R-FCN subnet to obtain a target detection model; and detecting a specific target in the image by using the model. The squeeze-Exciton structure and a dense connection structure are introduced into a feature extraction trunk network, characterization capability of the model is enhanced, adaptability of the model to targets of different sizes is enhanced through the feature pyramid structure, calculation sharing of the whole network model is achieved to the maximum degree through the R-FCN detection head, calculation resources are saved, and performance of the whole target detection model is improved. .

A hierarchical wireless network is provided with a mesh backbone network portion and a switching tree network portion. The mesh backbone network portion includes first tier nodes each having at least one wireless link to another first tier node. The first tier nodes execute a link-state protocol for routing packets. The switching tree network portion includes second tier nodes each having a single wireless link to one first tier node and at least one wireless link to one third tier node, and third tier nodes each having a single wireless link to one second tier node. The second tier and the third tier nodes execute switching rules for switching packets.

The invention discloses a pedestrian and vehicle detection method and system based on improved YOLOv3. According to the method, an improved YOLOv3 network based on Darknet-33 is adopted as a main network to extract features; the cross-layer fusion and reuse of multi-scale features in the backbone network are carried out by adopting a transmittable feature map scale reduction method; and then a feature pyramid network is constructed by adopting a scale amplification method. In the training stage, a K-means clustering method is used for clustering the training set, and the cross-to-parallel ratio of a prediction frame to a real frame is used as a similarity standard to select a priori frame; and then the BBox regression and the multi-label classification are performed according to the loss function. And in the detection stage, for all the detection frames, a non-maximum suppression method is adopted to remove redundant detection frames according to confidence scores and IOU values, and an optimal target object is predicted. According to the method, a feature extraction network Darknet-33 of feature map scale reduction fusion is adopted, a feature pyramid is constructed through feature map scale amplification migration fusion, and a priori frame is selected through clustering, so that the speed and precision of the pedestrian and vehicle detection can be improved.

The invention discloses a group switch method based on a mobility prediction. Multi-service group user ends which move along fixed routes in a major public transportation system need to apply to a target base station for group switch according to detected changes of a wireless channel. The method further provides a mobility prediction based on location information, which comprises the following steps: the process of reselecting a target cell is simplified by using a mobile historical database; and the target cell is enabled to obtain relative information of all group users in advance through a backup backbone network. Required channel resources are reallocated through strategies such as borrowing channels, etc. Therefore, the system switch speed of the group user terminal is greatly improved, and QoS of broadband wireless communications in the switch process is guaranteed. The method further discloses a group switch system based on the mobility prediction, which mainly comprises a location information unit, a switch judging unit, a channel borrowing and resource allocating unit and a channel allocating unit.

A communication device according to the present invention enhances transfer of time-critical data between one or more LANs and a device (e.g., edge router, etc.) coupled to a backbone network. A virtual bottleneck in the form of a queue is introduced by the communication device at the customer premises or customer end of a backbone network access line where the network congestion or bottleneck resides. The virtual bottleneck delays and/or discards time insensitive traffic prior to time-critical or voice traffic being delayed in the edge router. This is accomplished by the virtual bottleneck queue including a storage capacity or length less than that of a queue utilized by the edge router. A traffic manager or scheduler controlling the virtual bottleneck dynamically adjusts the virtual bottleneck based on the bandwidth required for time-critical packets to ensure sufficient bandwidth is available for those packets.

The invention provides a remote sensing image semantic segmentation method based on context information and an attention mechanism. For a to-be-labeled high-resolution remote sensing image, data preprocessing and data amplification are firstly carried out, and then the amplified data is used for training a remote sensing image semantic segmentation model. In the training process, preliminary features are extracted from the image through a backbone network, then multi-scale features are extracted and fused through a multi-scale context information module, then features of different levels are combined with an attention fusion module, and finally bilinear interpolation up-sampling is directly utilized to obtain a final segmentation result. For an unlabeled image, firstly the unlabeled imageis segmented into small image blocks, the small image blocks are input into a semantic segmentation network to obtain a corresponding result, and then the small image blocks are spliced to obtain a final large-size segmentation result graph.

A method and an apparatus for communication between a coordinator-based wireless network and a different type of network interconnected through a wired backbone network by means of a wired/wireless connecting device are disclosed. In the method, in order to communicate with a network device connected to a different type of network other than a coordinator-based wireless network, a network device in the coordinator-based wireless network provides a frame containing type information on the different type of network and information on a length of a physical address supported by the different type of network, and a wireless/wired connecting device converts the frame of the coordinator-based wireless network to another type of frame supported by the different type of network, and transmits the converted frame.