442 results about "Metropolitan area network" patented technology

Systems and methods for connecting and configuring a communication network are described. A network includes a first router; a tie-line having a plurality of full duplex dedicated router interconnects connected to said first router; a second router connected to said plurality of full duplex dedicated router interconnects; a first user connected to said first router with a first full duplex loop; and a second user connected to said second router with a second full duplex loop. The systems and methods provide advantages in that bursty control information can be multiplexed with time sensitive laminar data.

A method and system is provided in which data packets from multiple customer VLANs are forwarded over a MAN using VLAN aggregation. A layer-2 switch located at the edge of the MAN connects the customer VLANs to the MAN. The edge switch aggregates multiple customer VLANs (the “sub-VLANs”) into one provider VLAN (the “super-VLAN”). When a packet is forwarded from the sub-VLAN to the super-VLAN and vice versa, the edge switch uses modified bridge forwarding rules to exchange the customer-configured VLAN-IDs with the provider-configured VLAN-IDs before transporting the packet over the MAN. The edge switch further uses modified bridge media access control (MAC) address learning rules to isolate one customer's traffic from another's (i.e. isolate one sub-VLAN's traffic from another sub-VLAN's traffic).

The present disclosure provides for creating a metropolitan mesh network using vehicles as the framework. Mobile access points are installed on vehicles and configured to create ad-hoc, self-healing networks using mesh technology.

The present invention provides a system and method for maintaining and displaying information regarding high bandwidth telecommunication cables in metropolitan areas. The present invention allows a user to select a metropolitan area for display. The user may thereafter select one or more vendors who own high bandwidth telecommunication cables in the selected metropolitan area. A user may control the prominence of displayed cables by designating selected vendors in a prioritized list.

A residential gateway (RG) for distributing multimedia services to residential and business premises is disclosed. The RG connects multiple communication devices, such as TVs, telephones, computers, security cameras, and utility billing devices, to an Ethernet based metro/access network through either an optic fiber or a coaxial cable. The RG multiplexes upstream data from various communication devices into Ethernet frames according to the said Fixed-bandwidth Multimedia to Ethernet (FibME) protocol, and transmit the Ethernet frames through the link between the RG and the metro network. The RG also distributes the downstream data from the metro network to their corresponding destination devices in real time, also according to the said FibME protocol. The default bandwidth between the residential premise and the metro network is 100 Mbps full duplex. One Gbps or ten Gbps can be implemented based on the same FibME protocol for business applications. A Global Ethernet Addressing System (Global-HEAS) which will simplify the switch for the Ethernet systems is also disclosed.

A method and system for implementing weighted fair flow control on a metropolitan area network. Weighted fair flow control is implemented using a plurality of metro packet switches (MPS), each including a respective plurality of virtual queues and a respective plurality of per flow queues. Each MPS accepts data from a respective plurality of local input flows. Each local input flow has a respective quality of service (QoS) associated therewith. The data of the local input flows are queued using the per flow queues, with each input flow having its respective per flow queue. Each virtual queue maintains a track of the flow rate of its respective local input flow. Data is transmitted from the local input flows of each MPS across a communications channel of the network and the bandwidth of the communications channel is allocated in accordance with the QoS of each local input flow. The QoS is used to determine the rate of transmission of the local input flow from the per flow queue to the communications channel. This implements an efficient weighted bandwidth utilization of the communications channel. Among the plurality of MPS, bandwidth of the communications channel is allocated by throttling the rate at which data is transmitted from an upstream MPS with respect to the rate at which data is transmitted from a downstream MPS, thereby implementing a weighted fair bandwidth utilization of the communications channel.

A community network system with broadband integrated services includes video servers, video storages, video conference servers, satellite digital television receiver servers, a network accounting server, a network management server, Gigabit Ethernet Switches, Fast Ethernet switches, home gateways, wireless gateways, digital television sets, analogue television sets, computers, PCs with wireless interface, stationary IP telephones, and wireless IP mobile phones. The IP stationary phone can be connected between the Fast Ethernet switch and the home gateway, and also can be connected between the home gateway and the computer. The wireless gateway is connected to the mobile phone and a mobile device. The satellite digital television receiver server is connected to a satellite signal receiver antenna. The backbone Gigabit Ethernet Switch is connected to a Metropolitan Area Network via a 1000 Mbps or 100 Mbps port. The system simultaneously provides the services of digital television, Internet access of the computer and IP telephone. The present invention achieves the service integration of television network, telephone network and computer network, and the integration of wired and wireless networks, and ensures the qualities of various services, information security and reasonable accounting.

A system and method permits the creation of very-large metropolitan area networks (MANs) using Layer 2 (L2) switching technology. Different groups of L2 switches are logically organized into Islands. Connected to each Island are a plurality of customers sites, and an interconnect fabric couples the Islands together. The Islands cooperate to provide a Virtual Ethernet Connection (VEC) to each set of customer sites being coupled together. Customers identify their traffic that corresponds to a VEC by labeling or tagging it with a Customer-Equipment VLAN Identifier (CE-VLAN ID). Within each Island, the CE-VLAN ID specified by the customer's traffic (and hence the corresponding VEC) is mapped to a unique MAN Provider-Equipment VLAN ID (PE-VLAN ID). To prevent the formation of loops, the Islands run the Inter-MAN Control Protocol (IMCP), which represents a modified version of the Multiple Spanning Tree Protocol (MSTP).

The invention provides a method, a system and a device of security certificate. The method comprises the followings steps: encapsulating an empty certificate request in a protocol message of a remoteuser dial certification system (Radius) after an access controller (AC) activates the empty certificate of mobile termination (STA), sending the empty certificate request to an empty certificate server by a broad band access server (BRAS), and receiving the Radius protocol message in which a certificate result is encapsulated, returned by the empty certificate server through the BRAS; when the certificate result succeeds, authorizing the STA to be accessed to a wireless network, and permitting the STA to be accessed to a metropolitan area network after the BRAS determines the certificate result to be successful. The BRAS is fused in the empty certificate process, and the empty security certificate and the security certificate of accessing to the metropolitan area network are realized whileadopting the one-time empty certificate process. The invention has simple realization and brings user better user experience.

A method and apparatus for baseband transmission between a top floor unit and an outdoor unit in a terminal for a wireless metropolitan area network. A terminal for a wireless link in a metropolitan area network includes an extender device (e.g. a top floor unit) for receiving data packets from a computer network coupled to the extender device and for forwarding the data packets, and a broadcast device (e.g. an outdoor unit) coupled to the extender device for receiving the data packets from the extender device according to baseband transmission and having a wireless transceiver for communicating the data packets over the wireless link. The terminal can include a cable coupled between the extender device and the broadcast device wherein the cable comprises a twisted pair of conductors for providing the data packets from the extender device to the broadcast device. The twisted pair of conductors can be a Category 5 twisted pair of conductors. Thee broadcast device can include a microwave antenna coupled to the wireless transceiver; and a housing coupled to the microwave antenna for enclosing the wireless transceiver.

An emergency alert system for alerting DSL subscribers of imminent perils includes an alert server connected over a direct link to an edge node of a metro network for receiving an event notification, configuring from an event notification a highest priority alert message, and broadcasting the alert message to subscriber terminals over the metro network. An add multiplexer (ADM) multiplexes the alert traffic with the regular traffic onto the direct link, anthe multiplexed traffic reaches the edge node of the metro network, which is configured with a high priority policy. The edge node discards the lower priority traffic in the presence of the alert traffic and an applet installed on said subscriber terminal accepts and displays the alert message in a browser or a media player.

The invention relates to a backbone network system based on quantum communication and a relay method thereof. According to the method, key relaying is performed between the access nodes of all the metropolitan area networks of the backbone network in advance according to a certain strategy so that the access nodes of all the metropolitan area networks are enabled to perform secret communication byusing the relay key; at least one server side is set for the access nodes and the relay nodes, and the access nodes periodically and automatically initiate relaying to other access nodes; the respective key management terminal of the access nodes and the relay nodes periodically reports the calculated key amount to the connected server side; and the server side respectively generates a quantum routing table and a relay routing table according to different shared key amount types and calculates the path key amount to be issued to the access nodes and the relay nodes, and each access node performs automatic relaying according to the routing table and the path key amount acquired from the server side.

A secure wireless local or metropolitan area network and data communications device therefor are provided, where the device transmits plain text in an encrypted message including cipher text and an initialization vector. The device may include a seed generator for performing a one-way algorithm using a secret key, a device address, and a changing reference value for generating a seed. Further, a random initialization vector (IV) generator may be included for generating a random IV, and a key encryptor may generate a key sequence based upon the seed and the random IV. Additionally, a logic circuit may be included for generating cipher text based upon the key sequence and plain text, and a wireless communications device may be connected to the logic circuit and the random IV generator for wirelessly transmitting the encrypted message.

The optimization method for P2P application in MAN comprises: a. when requiring downloading some resource, calling this P2P node as the request P2P node; b. searching the P2P index server to find out the P2P node list included the target resource, and calling as resource P2P node; c. from resource P2P node list, finding out the one with shortest distance with the request P2P node; and d. downloading target resource from one or more resource P2P nodes. Compared with prior art, this invention limits P2P flow on network edge as far as possible, can avoid network congestion led by P2P business, and fit to spread widely.

A system and method provide transparent LAN services in a metro-WAN environment to extend enterprise LANs over metro and wide area networks. The transparent LAN services generally provide customers with a layer two Ethernet connectivity with MAC learning capabilities.

An Ethernet Optical Area Network (EOAN) system, and methods for implementing and using such an EOAN system, are disclosed. The EOAN system may be used to improve the speed and reliability of data communications networks for small to medium-sized companies in metropolitan area networks. The EOAN system provides end-to-end Ethernet protocol, enabling professionals to have high-speed data communications in real time. The EOAN system may be generally utilized for improving data communications between branch offices, home offices, campuses, and remote sites for a wide variety of industries. The present invention preferably includes a fiber optic ring, Network Operation Center (NOC), NOC architecture components, existing client equipment, and one or more Free Space Optic (FSO) devices, microwave communication technology, and/or data switching platforms to implement high-speed Ethernet-based connections such as within a specified metropolitan area. The preferred EOAN system preferably integrates a plurality of FSO, microwave, and/or fiber optic technologies with Ethernet protocol (Fast Ethernet, Gigabit Ethernet, 10 Gigabit, etc.) to provide data connection services.

The invention discloses one method and system for one city zone Ethernet reliability process, which comprises the following steps: establishing one virtual router redundant agreement set by two business control gates and separately establishing interface device and virtual router agreement gate connection through virtual special local net; according to the process results, determining virtual router main backup business control gate and establishes business control gate and interface for process.

The invention discloses a method for accelerating network caching based on a proxy cluster. A centralized control mode is mainly adopted, a Load_balancer distributees user requests to a proper Proxy by inquiring an SPH table and executing a Probabilistic load balancing strategy, the Proxy judges whether the caching hits the target or not in an hash mode, the caching in the Proxy is directly returned to a client-side if the caching hits the target, and a client is replaced to send requests to a source station if the caching does not hit the target, and responses are delivered to the client-side. An unusually large file routing table does not need to be maintained on the Load_balancer by building the mapping relation between a station and a Proxy set, and the situation that a bottleneck occurs to the Load_balancer is avoided. The method can have an effective acceleration function on users in a local area network and a metropolitan area network.

The invention discloses a survey method for an audience rating of digital television users. The method is characterized in that the method comprises the following steps that: a data collection step in which a data collection module is internally arranged on a middleware of a digital set-top box and is responsible for collecting user viewing behavior data; a data transmission step in which the digital set-top box is connected with an Internet network by a built-in Bluetooth or an externally connected network card and transmits the data to a server having a public network IP; a data storage process in which the server receives the data and then the data are parsed and stored to a database; a data analysis process in which the server carries out automatic analysis and statistics on the data; and a data presentation process in which a client invokes a server to carry out calculation and analyses on all indexes of the audience rating and present data of data analysis results of the reviewing behaviors. According to the invention, a set-top box with two-way transmission is supported; and user viewing behavior data is transmitted from an Internet or a metropolitan area network to a server; therefore, compared with the traditional survey mode, the survey method provided in the invention has advantages of high real-time performance, high accuracy and low cost and the like; moreover, lots of manpowers, material resources and financial resources are saved.