879 results about "Relay network" patented technology

A method and system for establishing a Virtual Path (VP12) capability in a Frame Relay network wherein frames are transmitted over a plurality of virtual circuits from a first switching node to a second switching node. A control message is transmitter from the first switching node to the second switching node with a Data Link Connection Identifier (DLCI) having a predetermined value indicating the purpose of the control message which is to define a virtual path aggregating at least two virtual circuits selected from multiple virtual circuits. The control message contains the identification of the virtual circuits aggregated in the defined virtual path.

Systems and methods are disclosed for utilizing one or more tablet computer assemblies in a portable communications system. A tablet computer assembly includes a global positioning system module, an L-band transceiver, and a processing system. The global positioning system module that produces location information associated with the position of the tablet computer assembly. The L-band transceiver broadcasts the location information to at least one portable communication device through a relay network and receives location information from the at least one portable communications device via the relay network. The processing unit provides messages to the L-band transceiver and updates a display associated with the tablet computer assembly according the received location information and the location information produced at the global positioning system module.

An apparatus for optimizing communications between session border controllers in a network environment is provided that includes a session border controller (SBC) operable to communicate with a first endpoint and a second endpoint. The SBC is also operable to communicate with a data path border element (DBE) and a signaling path border element (SBE). The DBE is operable to provide a media relay for a communication session involving the endpoints, the media relay being invoked by either of the endpoints using a traversal using relay network address translation (TURN) protocol, which allows the SBC to operate in either of two modes depending on protocol support present in the endpoints.

An intrinsically safe accurate location information network for personnel and assets in underground mines, including wireless access points and subnetwork controllers, active wireless locator / messenger tags, network controller(s), and enterprise servers running application control software. The wireless access points are installed in mine entries and crosscuts and track the active wireless locator / messenger tags. The active tags may be worn by mine personnel or installed in mining equipment. The network subsystems form relay networks that wirelessly carry telemetry and control data without the need to penetrate the earth. The subsystems determine the location of persons and assets underground and monitor safety-related information, which can be used for disaster avoidance, early warning of impending disaster, and improved rescue effectiveness. .

Devices, such as tracking devices, cooperate with one another to establish the routing necessary for a relay network in which a device having power-efficient and data-reliable communication with an access portal, operates to relay messages from devices which do not have an acceptable communication path to and / or from the access portal. In one aspect of the present invention, a plurality of devices synchronously determine whether an acceptable communication path can be established between themselves and one or more access portals by measuring the signal strength of an access portal beacon. In another aspect of the present invention, one or more devices, which have determined that an acceptable communication path can be established between themselves and an access portal, transmit information regarding their availability to relay messages on behalf of devices which have determined that an acceptable communication path cannot be established between themselves and an access portal.

A wireless relaying network having a number of network nodes including a designated originating node, at least one relaying node, and at least two receiving nodes. The designated originating node transmits a pilot signal, and the relaying node(s) receives and forwards the pilot signal to the receiving nodes, each of which measures channel quality based on the received pilot signal. At least part of the receiving nodes feed information on the measured channel quality all the way back to the designated originating node, and the originating node then schedules data for transmission to at least one selected node of the receiving nodes based on the received channel quality information. Subsequently, the designated originating node transmits data to the selected receiving node(s) via the same relaying node(s) that forwarded the pilot signal. In this way, multi-user diversity scheduling is introduced to relaying networks that provides significant data rate enhancements.

The embodiments balance wireless communication bandwidth capacity in a channel one or more cascading wireless communication links in a wireless communication cell, and manage the wireless communication bandwidth capacity in the channel across two or more virtual cells within the wireless communication cell.

A method and system for communicating information in a cooperative relay network of wireless nodes. The wireless nodes including a source, a set of relays, and a destination. Channel state information for each channel between a particular relay of the set of relays and the destination is estimated. A subset of the relays is selected based on the channel state information. The channel state information is fed back to the subset of relays. The source node can then broadcasting data packets from the source to the subset of relays, and the subset of relays forward coherently the data packets from the subset of relays to the destination using beamforming based on the channel state information, while adjusting power to minimize a total energy consumption in the network.

A method communicates packets in a relay network. The packets are communicated from a set of mobile stations to a relay station using a set of connections, there being one connection between each mobile station and the relay station. The packets are communicated between the relay station and a base station using a relay tunnel connection, between the relay station and its adjacent relay station the packets are communicated using the relay tunnel connection.

An approach provides interdomain traversal to support packetized voice transmissions. A signaling message is received for establishing a voice call from a first endpoint associated with a first domain to a second endpoint associated with a second domain. The first endpoint queries a STUN (Simple Traversal of UDP (User Datagram Protocol)) server to determine information relating to a firewall and network address translator that the first endpoint is behind, and to log into a TURN (Traversal Using Relay NAT (Network Address Translation)) server configured to establish a media path between the first endpoint and the second endpoint. A first proxy server serving the first endpoint communicates with an ENUM (Electronic Number) server to convert a directory number corresponding to the second endpoint to a network address. The first proxy server communicates with a second proxy server serving the second endpoint to establish the voice call. The STUN server, the TURN server and the ENUM server are maintained by service provider. The first endpoint is authenticated to permit exchange of a media stream over the media path. The media stream is relayed, if the first endpoint is successfully authenticated.

One illustrative method for use by a host server in pushing messages to a mobile communication device involves the steps of causing a message to be sent to a relay network for delivery to the mobile communication device through one of a plurality of wireless communication networks which are communicatively coupled to the relay network; receiving, from the relay network, a result message when the mobile communication device is unavailable to receive the message through the wireless communication network, the result message comprising a message identifier which uniquely corresponds to the message; maintaining storage of the message in memory accessible by the host server after the result message is received; receiving, from the relay network, a status message which indicates that the mobile communication device is available to receive the message when the mobile communication device is available to receive the message through the wireless communication device; and causing the message to be sent again to the relay network for delivery to the mobile communication device in response to receiving the status message. During the unavailability of the mobile device, the relay network refrains from maintaining storage of the message in memory of the relay network.

A system and method for communicating information in a wireless cooperative relay network of nodes, the nodes including a source, a set of relays, and a destination. The source broadcasts a code word encoded as a data stream using a rateless code. The relays receive the data stream, decode the data stream to recover the code word, and reencode and transmit the recovered code word as the data stream with the rateless code. The destination receives and decodes the reencoded data streams to recover the code word.

A method and apparatus is disclosed herein for performing multi casting. In one embodiment, the method comprises receiving routing, association, relaying, and / or topology information associated with a plurality of nodes in a multi-hop wireless network, the plurality of nodes communicably coupled in a tree or mesh arrangement via a plurality of broadcast channels; and determining a subset of the plurality of nodes over each broadcast channel on the multi-hop wireless network that is responsible for sending acknowledgment information, in response to receipt or lack of receipt of transmissions, back to senders of transmissions.

The invention concerns a or key distribution system comprising a server node, a repeater network connected to the server node through a quantum channel, and a client node connected to the repeater network through a quantum channel; wherein in use the repeater network and the client node cooperatively generate a transfer quantum key which is supplied to a system subscriber by the client node; the server node and the repeater network cooperatively generate a link quantum key; the repeater network encrypts the link quantum key based on the transfer quantum key and sends the encrypted link quantum key to the system subscriber through a public communication channel; the node encrypts a traffic cryptographic key based on the link quantum key and a service an key and sends the encrypted traffic cryptographic key to the system subscriber through a public communication channel.

The invention aims to provide a wireless multi-hop ad hoc network communication method, which comprises the steps of network establishment and maintenance, and service transmission. The network establishment and maintenance comprises the following steps of: finding of neighbors; adding and deletion mechanisms of the neighbors; and establishment and maintenance of a route, in which the interaction of neighbor information among network nodes ensures that each network node finally possesses a topology table of whole network connection relationship, then a main operation node of the network nodes is used to calculate the route of the whole network according to the topology table and notifies other network nodes in the network of routing information in an information interaction mode at the same time, and the topology table and a routing list respectively saved by each network node are kept consistent to finish the establish of the network when the network is finally steady. The service transmission comprises the following steps of: search of an access point, link application, link establishment, service transmission and link demolition. A self-developed wireless multi-hop ad hoc relay network of the invention can finish the communication in tunnels or on occasions with similar characteristics.

A method, system and network transmit data from a base station, via relay stations, to user stations. Imperfect channel state information (CSI) for downlink channels from the base station and the relay stations to the user stations is acquired. For each candidate transmission strategy of a set of candidate transmission strategies, a corresponding beamforming matrix is determined according the imperfect CSI. For each beamforming matrix, a bound on an expected target benefit function is determined, and a particular one of the bounds is selected. The data are then transmitted from the base station, via the relay stations, to the user stations according to the beamforming matrix associated and the candidate strategy associated with the selected bound.

A method selects an optimal route in a cooperative relay network including a set of nodes. For each node in a set of nodes of a cooperative relay network, dynamically varying channel state information is determined. A transmission policy based on the dynamically-varying channel state information is selected, in which the transmission policy includes selected nodes forming an optimal route, a transmission mode for each selected node, and a transmission power for each selected node.

This invention relates to a Li ionic power storage battery balance circuit. Every battery module has a set of balance circuit, at least two units of battery modules are serial, positive and negative ends of the battery module V are connected with a relay, serially connected with a self-restoring fuse and connected and a constant current DCDC converter with a discharge resistor switches separately. In the entire battery set by two conversions, the battery is charged or discharged according to the target balance voltage, balanced maximum volume difference or the maximum voltage difference designed by the module, the relay network switches the charge or discharge of the resistor of the constant current DCDC converter.

Methods and Systems are provided for bridging heterogeneous media packets using a single processor resource having a virtual bridge. Network interfaces associated with heterogeneous media channels relay network packets to the virtual bridge. The virtual bridge accesses metadata associated with the relayed network packets and translates the network packets to between media formats. The translated network packets are then relayed to an appropriate network interface. In one embodiment, the virtual bridge is dynamically configurable within the processing resource.

A route is selected in a wireless cooperative relay network of nodes. A decoding order is initialized. A set of resources is minimized subject to constraints. The resources are allocated to the nodes in the decoding order. The decoding order is changed iteratively to further minimize the allocated resources, until a minimum is reached. A code word is transmitted when the allocated resources are at the minimum, which can either be determined globally or locally at each node. The method can operate in a centralized or distributed manner.

According to a technical aspect of the invention, there is provided a multiple unmanned aerial vehicles navigation optimization method is performed at a ground base station which operates in conjunction with unmanned aerial vehicles-base stations which are driven by a battery to move and cover a given trajectory point set, the multiple unmanned aerial vehicles navigation optimization method including: calculating an age-of-information metric by receiving an information update from the unmanned aerial vehicles-base stations through communication, when the ground base station is present within a transmission range of the unmanned aerial vehicles-base stations; setting conditions of a trajectory, energy efficiency, and age of information of each of the unmanned aerial vehicles-base stations; and executing Q-learning for finding a trajectory path policy of each of the unmanned aerial vehicles-base stations, so as to maximize total energy efficiency of an unmanned aerial vehicles-base station relay network to which the energy efficiency and the age of information are applied.According to the invention, the following effects are obtained. Age of information (AoI) that is a new matrix used to measure up-do-dateness of data is set, an edge computing environment for a remote cloud environment is provided by using the AoI, and a computing-oriented communications application can be executed by using the edge computing environment.

The invention provides a data structure embodied in a computer readable media. The data structure is a protocol data packet (PDU) communicated in a mobile multihop network between stations. The data structure includes a relay media access header, a payload and an optional cyclical redundancy checksum for the protocol data unit; and an indication whether the PDU is a relay media access protocol data unit or not.

A method and system locates a position of a transceiver in a cooperative relay network of nodes. A primary node broadcasts a range request (RREQ) message. A target node, in response to receiving the RREQ message, broadcasts a range reply (RREP) message, wherein the RREP message includes a time difference between receiving the RREQ message and broadcasting the RREP message. A secondary node, in response to receiving the RREQ message and the RREP message, broadcasts a range data (RDAT) message, wherein the RDAT message includes a time difference between receiving the RREQ message and the RREP message. Then, a position solver can determine a location of the target node based on the time differences in the RREP message and the RDAT message.

The present invention relates to a method, a system and an apparatus for implementing bandwidth allocation and scheduling management based on a relay station. A mapping information unit for controlling a RS (MAPRS) is set in a frame structure of the physical layer of a BS and an extended frame structure of the physical layer of a BS is constructed in a frame structure of the BS physical layer. The BS constructs a mapping information message MAPRS for controlling the relay station RS base on the extended frame structure of the BS physical layer, and performs bandwidth allocation and scheduling management of a communication channel of the RS by the RS according to the MAPRS message. Through the present invention, a bandwidth allocation is implemented mainly at the BS, and a service scheduling is implemented mainly at the BS. The RS only performs an uplink or downlink scheduling of the RS passively. The complexity of the RS reduced effectively. The Multi-hop relay problem is solved using a bandwidth request relay and a bandwidth allocation relay, without introducing any complex technologies and procedures of the bandwidth request, the bandwidth allocation and the scheduling management. The complexity of the BWA relay network is simplified.

The embodiment of the invention discloses a switching method, an evolved Node B (eNodeB) and a home gateway and belongs to the technical field of communication. The method comprises: the eNodeB determines that user equipment (UE) is switched to the eNodeB or a second subordinate relay station of the eNodeB from a first subordinate relay station of the eNodeB; and the eNodeB sends a UE context release command to the first relay station under the condition of sending no switching notification to core network equipment. According to the technical scheme, in the UE switching process, the terminal switching flow of a relay network is simplified.

Cached or predictive negotiation of compression parameters over a modem relay network connection involves method and apparatus for determining at a gateway the identity of a client / server modem that is called or calling, and using a profile of such called or calling client / server modem, the profile being stored at the gateway or an affiliated agent, to transmit respectively a candidate response or command containing compression parameters. Preferably, a candidate response or command includes an exchange identification (XID) or link request (LR) command or response, either provisioned, i.e. manually configured or automated, i.e. computer-generated. The profile is stored in a memory. The actual achieved parameters for a given call also may be stored, e.g dynamic learning may be had. Finally, establishing such profiles by placing dummy calls once the modem's phone number is known also is described as a feature of the invention.

The present invention provides an enhanced H-ARQ scheme that optimizes bandwidth utilization and spectrum efficiency. When an H-ARQ attempt is unsuccessful due to loss or error over a hop between the BS and MS / SS, then only the first node in the hop chain that fails to decode the packet transmits another H-ARQ attempt. The BS determines the first node that fails on decoding based on certain information such as the feedback information sent from the nodes on the path. The previous node of the failed node is then instructed to retransmit by the BS.

In a sensor network system, a communications network connects a set of sensors to a server collectively managing the set of sensors. First, the sensor-managing server acquires remaining drive times of batteries in the sensors, and specifies a target remaining drive time. The server then controls the operation of the sensors so that the remaining drive times of the batteries in the sensors are substantially equal to the target remaining drive time. This reduces the maintenance workload for a system manager, especially, in the recharging of the sensor batteries.