3254results about "Active radio relay systems" patented technology

The present system is directed to a computerized system for monitoring and controlling remote devices by transmitting data between the remote systems and a gateway interface via a packet message protocol system. The system comprises one or more remote sensors to be read and possibly one or more actuators to be remotely controlled. The remote sensor(s)/actuator(s) then interface with uniquely identified remote transceivers that transmit and/or receive data. If necessary in individual applications, signal repeaters may relay information between the transceiver(s) and the gateway interface. Communication links between the remote transceivers and the gateway interface are preferably wireless but may also be implemented via a mixture of wireless and wired communication links. To successfully communicate between the transceiver(s) and the gateway interface, the present invention receives a plurality of RF signal transmissions containing a packet protocol via RF signals that includes sender and receiver identifiers, a description of the packet itself, a message number, any commands, the data, and an error detector. In addition, the packet protocol can be easily integrated with alternate data communication protocols for use with systems other than the Internet.

A method for configuring a wireless network comprised of a control node and a multiplicity of individual nodes includes the steps of logically organizing the network into a plurality of bands Bi, wherein each of the bands Bi includes a plurality of the individual nodes and is located a number i of hops away from the control node, where i=0 through N, and N≧1, and then assigning a logical address to each of the individual nodes, and storing the assigned logical addresses in the respective individual nodes. The assigned logical address for each individual node includes a first address portion which indicates the band Bi in which that individual node is located, and a second address portion that identifies that node relative to all other individual nodes located in the same band. The network is preferably a packet-hopping wireless network in which data is communicated by transferring data packets from node-to-node over a common RF channel. Each of the individual nodes is preferably programmed to perform the step of comparing its own logical address to a routing logical address contained in each packet which it receives, and to either discard, re-transmit, or process the packet based upon the results of the comparison. The routing logical address contained in a received packet contains the full routing information required to route the packet from a sending node to a destination node along a communication path prescribed by the routing logical address. The control node is programmed to control the routing of packets by inserting the routing logical address into each packet which it transmit, detecting any unsuccessfully transmitted packets, detecting a faulty node in the communication path prescribed by the routing logical address in response to detecting an unsuccessfully transmitted packet, and changing the routing logical address of the unsuccessfully transmitted packet to a new routing logical address which prescribes a new communication path which does not include the detected faulty node. Also disclosed are a wireless network and a network node which are designed to implement the foregoing network configuration and/or routing methods.

A repeater mediates traffic between a network transceiver and a user transceiver in a wireless communication system. The repeater comprises a network unit that maintains a network link with the network transceiver, a user unit that maintains a user link with the user transceiver, a two-way communication pathway between the network unit and the user unit; that facilitate the communication of signals between the network transceiver and the user transceiver in autonomous repeater hops between the network transceiver and the network unit, between the user transceiver and the user unit, and between the network unit and the user unit, and a gain controller that compensates for propagation losses between the network unit and user unit alone.

The present invention relates to wireless networks using relaying. In the method according to the present invention of performing communication in a two-hop wireless communication network, a transmitter 210, a receiver 220 and at least one relay station 215 are engaged in a communication session. The relay station 215 forwards signals from a first link between the transmitter 210 and the relay station 215 to a second link between the relay stations 215 and the receiver 220. The forwarding performed by the at least one relay station 215 is adapted as a response to estimated radio channel characteristics of at least the first link. Preferably the forwarding is adapted as a response to estimated radio channel characteristics of both the first and second link.

A low cost, robust, repeater for a wireless ambient sensor system that provides an extended period of operability without maintenance is described. The repeater includes a controller and first and second transceivers. The controller is configured to control operation of said first transceiver and said second transceiver. The wireless repeater includes a repeater identification. The controller is configured to manage a sensor unit identification table that contains a list of sensor unit identification codes, where entries for the sensor unit identification table are received by the second transceiver from the base unit and identified by the repeater identification. The controller controls the first transceiver and the second transceiver to forward data from sensor units listed in said sensor unit identification table and to ignore data from sensor units not listed in said sensor unit identification table. The controller also controls the first transceiver and the second transceiver to forward data from the base unit that is addressed to sensor units listed in said sensor unit identification table and to ignore data from the base unit that is addressed to sensor units not listed in said sensor unit identification table. The controller places the first transceiver and the second transceiver in a low-power mode when no transmissions are expected from the base unit or from the sensor units listed in the sensor identification table.

A wireless headset system for use with, e.g. mobile phones, and which incorporates a wireless headset which communicates with a base station via magnetic inductive coupling or radio frequency signals to dial and send or receive calls via a conventional phone, e.g. a mobile phone, attached to the base station. In one embodiment, the mobile phone is carried in the base station which is worn by the user.

In a wireless ad hoc network comprising a plurality of nodes, a primary node receives a domain name service (DNS) query from a node. The primary node determines whether the query can be resolved based on cached information. If the DNS query can be resolved based on cached information, the primary node sends a response to the node. If the DNS query cannot be resolved based on cached information, the primary node sends the DNS query outside the ad hoc network for resolution.

An integrated repeater includes a housing having opposing sides, a donor antenna mounted on one of the opposing sides, a null antenna mounted on the other of the opposing sides, and repeater electronics mounted in the housing and operatively interconnecting the donor antenna and the null antenna. The repeater electronics include a beamforming arrangement for creating a desired antenna pattern of the donor antenna relative to a base station and a desired antenna pattern of the null antenna relative to subscriber equipment, and interference cancellation electronics for cancelling interference feedback signals between the donor antenna and the null antenna in both an uplink path and a downlink path.

An ultrawideband radio transceiver/repeater provides a low cost infrastructure solution that merges wireless and wired network devices while providing connection to the plant, flexible repeater capabilities, network security, traffic monitoring and provisioning, and traffic flow control for wired and wireless connectivity of devices or networks. The ultrawidebande radio transceiver/repeater can be implemented in discrete, integrated, distributed or embedded forms.

A method, wireless device and computer program product for expanding the coverage of a cellular network. A wireless device (e.g., cellular telephone) is able to communicate with a base station in a cell of the cellular network over a non-cellular interface via another wireless device in the cell through the use of multi-hopping. A wireless device may request permission to communicate with the base station over a non-cellular interface via hopping off another wireless device when its signal strength is below a threshold. Alternatively, a wireless device may receive a request to communicate with the base station over a non-cellular interface via hopping off the wireless device that sent the request when that wireless device has excess capacity in its bandwidth with the base station. By enabling wireless devices to communicate with a base station in such a manner, the effective coverage area of the cellular network is expanded and the effective capacity of the cellular network is improved.

The present invention relates to a global network based vehicle safety and security system and method. In this regard, a global network based data processing resource can wirelessly data communicate with an in-vehicle device to control and monitor vehicle safety and security. In addition, data communicated between the vehicle and global network based data processing resources can control, monitor, and track the vehicle as well as data communicate command and control functions, such as disabling vehicle operation. Furthermore, alarm and alerting functions can effectuate the notification of other data processing resources and or other agency or emergency resources.

Vehicle and in-vehicle device data, including safety and security data gathered at data processing resources can be utilized to effectuate a wide variety of data dissemination. Such data dissemination can include warning, alarm, safety, or security determinations, and or other reporting or analysis related to vehicle safety and or security.

A first radio signal is received via a first satellite reception path, for example, an antenna or spot beam, which serves a satellite cell. The received first radio signal includes a desired satellite uplink signal transmitted from a first source using a frequency assigned to the satellite cell and an interfering signal transmitted from at least one second source using the frequency assigned to the satellite cell. A second radio signal is received via a second satellite reception path, for example, via another antenna or spot beam of the system and/or via a satellite antenna beam of another system. The second radio signal includes a measure of the interfering signal. The first and second radio signals are processed to recover the desired satellite uplink signal.

A multi-mode base station includes a transmit standby mode and an active mode. Transmit standby mode of base station operation is a low power/low interference level of operation as compared to active mode. In transmit standby mode at least some of the synchronization signaling such as pilot tone signaling is reduced in power level and/or rate with respect to the active mode. In transmit standby mode, the base station has no active state registered wireless terminals being serviced but may have some sleep state registered wireless terminals being serviced. Mode transitions from active to transmit standby may be in response to: a detected period of inactivity, scheduling information, base station mode change signals, and/or detected wireless terminal state transition. Mode transitions from transmit standby to active may be in response to: scheduling information, access signals, wake-up signals, hand-off signals, wireless terminal state change signals, and/or base station mode change signals.

A method and apparatus for controlling an output power level of a radio frequency (RF) repeater (100 or 200). A system includes a receiver to receive a signal, a filtering unit configured to pass frequency components at or around a frequency band of a predetermined communication channel, an attenuator (124 or 142) to produce an attenuated signal by attenuating a parameter of the signal, a power amplifier (150) to adjust the output power level of repeater to a desired level by adjusting the gain of one or more components of the system, and a microprocessor (170) to receive an input responsive to the output power level of the repeater and, in response to the input, to transfer control signals to the receiver and the attenuator. The method includes sampling traffic load characteristics during operation of a network and adjusting a gain of one or more components of the repeater based on the traffic load characteristics.

A space segment for a radioterminal communications system includes a satellite having service link antennas of different sizes that are configured to communicate with at least one radioterminal. The service link antennas of different size may serve different sized geographic areas, which may at least partially overlap. Analogous radioterminal communications methods also are provided.

A network for wireless transmission of data includes a source access point, a destination device and a plurality of wireless repeaters that provide a transmission link between the source access point and the destination device. The plurality of access points each includes a single transceiver with separate transmitter and receiver sections operable to simultaneously transmit and receive data on different frequency channels. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Two satellite communications systems can use the same frequency or frequencies in geographically overlapping footprints, without creating undue interference in a given system that is caused by the same frequency signal(s) that is/are used by the other system. In particular, an aggregate Effective Isotropic Radiated Power (EIRP) of the radioterminals and/or ancillary terrestrial components of a second satellite communications system in the common footprint is sufficiently low, and/or the receive antenna gain of a first satellite communications system is sufficiently low compared to the receive antenna gain of the second satellite communications system, so as to increase an aggregate receiver noise that is seen by the first satellite system receivers by an amount that does not substantially change a Quality of Service (QoS) of the first satellite communications system.

A join process is disclosed for a wireless mesh topology network. In the network, nodes have multiple spatial coverage sub-sectors together covering a larger sector angle and a node can establish connection with other nodes located in directions covered by its sub-sectors. The join process adds a joining node to the network and includes having the joining node listen to sub-sectors at a specific receiving frequency for a defined time. Thereafter, the network node changes its sub sectors and its receiving frequencies according to a defined timing and sequence. Active network nodes transmit organized invitation data packets on defined sectors, frequencies and timing, based on relative location and relative angle orientation deduced from sub-sectors already in use for existing internal network communication. This reduces frequency interference in the network and reduces time required for the join process.