Abstract: A method, system, network and device provide Smart Grid RFI detection. One or more symbols or chips present in one or more received radio frequency signals are detected and the presence of one or more erred symbols or chips in the detected one or more symbols present in the received one or more radio frequency signals determined. A correlation in time between the one or more erred symbols or chips and an infrastructure waveform associated with electrical infrastructure can be determined. When the determined correlation indicates the electrical infrastructure as a source of detectable radio frequency interference to a device, a pattern flag is generated. The pattern flag or pattern flag representation can be stored and/or transmitted.

Abstract: A method, system, network and device provide Smart Grid RFI detection. One or more symbols or chips present in one or more received radio frequency signals are detected and the presence of one or more erred symbols or chips in the detected one or more symbols present in the received one or more radio frequency signals determined. A correlation in time between the one or more erred symbols or chips and an infrastructure waveform associated with electrical infrastructure can be determined. When the determined correlation indicates the electrical infrastructure as a source of detectable radio frequency interference to a device, a pattern flag is generated. The pattern flag or pattern flag representation can be stored and/or transmitted.

Abstract: A method, system, and device provide asymmetric round-trip-time (RTT) ranging with multipath correction. A RTT ranging determination using the resulting composite received signal contains multipath error, and compensation or correction of this error in a manner compatible with low-power, low-complexity devices, such as tag devices, is provided.

Abstract: A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.

Abstract: A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.

Abstract: A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.

Abstract: A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.

Abstract: A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.

Abstract: A method (500) and system for compensation of frequency offset between a first transceiver (102) and a second transceiver (104) in wireless communication are disclosed. The compensation of the frequency offset between two or more transceivers (102, 104) is achieved by transmitting a set of frequency synchronization bursts. These bursts contain information about the frequency offset. The frequency synchronization bursts are transmitted by the first transceiver at a range of frequencies above and below its carrier frequency (502). When system conditions permit, a subset of the set of frequency synchronization bursts may be transmitted instead of transmitting the full set of frequency synchronization bursts.

Abstract: A technique (300) and apparatus for sharing frequency spectrum amongst cognitive radios, without the use of a centralized control, is provided. By determining open segments of available spectrum within a brokered spectrum (306), and determining costs associated with those available segments (307), a CR device can identify an optimal spectral portion (308) within which to transmit (314) and grow (342) a narrowband signal. The occupied bandwidth growth is monitored such that cost associated with the growth does not exceed a cost threshold (341).

Abstract: During operation of a node in a secondary communication system (100) data enters a spreader (301) and is appropriately spread. The spread data is then modulated onto all available channels using a multi-carrier OFDM modulation technique. This entails the spread data being modulated onto those channels that are currently being used by the primary communication system (120). Finally, a transmitter (303) transmits the spread data only over carriers that will not interfere with the primary communication system.

Abstract: The application discloses a method and apparatus for advertising a spectrum in a wireless communication system. The method includes obtaining an address of a broker device authorized to negotiate access to the spectrum, and sending an inquiry message to the broker device for negotiating access to at least a portion of the spectrum. The method then includes receiving an agreement message including an advertisement text from the broker device when the first user device agrees to negotiating terms associated with the broker device. The advertisement text includes information related to the portion of the spectrum and the broker device. The method further includes transmitting a packet including the advertisement text to at least one other user device such that the at least one other user device communicates with the broker device for allocation of the portion of the spectrum.

Abstract: A method (300) and cognitive radio (CR) wireless device (102) are provided for dynamically accessing spectrum in an opportunistic spectrum access wireless communication system (100). The method includes: transmitting, from a CR wireless device, a signal (216) having a first bandwidth within an unoccupied portion of spectrum (206), and after a time interval (T3) following the transmitting, and upon determining that an adjacent spectral quantum is occupied, transmitting from the CR wireless device a signal (216) having a second bandwidth, the second bandwidth being less than the first bandwidth. The method doubles a rate of growth of bandwidth of a transmitted signal when a spectral quantum adjacent to one side of the signal is unoccupied and a spectral quantum adjacent to the other side of the signal is occupied. The method utilizes knowledge of location of the CR wireless device and of band-edges to intelligently use spectral fence quanta.

Abstract: A technique (300) and apparatus for sharing frequency spectrum amongst cognitive radios is provided. By maintaining an unoccupied spectral quantum between each CR device, the channel technique ensures that a device just beginning transmissions in the CR frequency band will have spectrum from which to start growing. The growth can continue up to the maximum the spectrum can support, when the bandwidth of each device has been reduced to one spectral quantum, and there are no available spectral quanta left.

Abstract: A wireless communication device (100) including a high-speed data buffer coupled to a first transceiver by a bus, and an application processor having a data buffer associated with the application processor. The associated data buffer is coupled to a high-speed data buffer and to a second transceiver by the bus, wherein the application processor is configured to control the transfer of data between the associated data buffer and the high-speed data buffer and to control the transfer of data between the associated data buffer and the second transceiver.

Abstract: A method and apparatus for a highpass filter structure using transmission line construction which has multiple output tabs for selection of corner frequencies utilizing a plurality of resonators coupled to the transmission line. The transmission line has a characteristic impedance which increases exponentially with respect to a distance from the input.

Abstract: A process for merging and using the Mediation Device Protocol with a network layer protocol. Under the merged protocol, each device joining a network enters into two stages: the Set-Up Stage and the Normal Operational Stage. During the Set-Up Stage, the device identifies its neighbors, builds a neighborhood list, obtains a Logical ID, and picks a parent node in the network. After the Set-Up Stage is complete, the device enters the Normal Operational Stage where it will send/receive control and data messages, invite and help new nodes to join the network, recover from broken links or topology changes, and other normal network operations.

Abstract: A cluster tree network formed by self-organization of a number of nodes. The method of self-organization includes processes for cluster formation, cluster network maintenance, intra-cluster communication. In the cluster formation process, each node discovers if any neighboring node is a cluster head or if any node is already a member of a cluster (thus making it a networked node), and if a cluster head or a networked node is discovered, each node establishes a communication link with the cluster head or the networked node. If no cluster head or networked node is discovered, the node itself becomes a cluster head. The network is maintained by each node periodically broadcasting a HELLO message to neighboring nodes, receiving responses to the HELLO message and updating a neighbor list in accordance with responses to the HELLO message. Multi-cluster networks are also provided using the processes of inter-cluster network formation, inter-cluster network maintenance, and inter-cluster communication.

Abstract: A signaling system is provided in which a spread spectrum code is cyclically shifted by a cyclical shift dictated by a bit pattern of one or more bits. The cyclically shifted spread spectrum code is used to modulate a carrier frequency, and transmitted from a transmitter to a receiver. At the receiver the signal including the cyclically shifted spectrum code is demodulated to recover the cyclically shifted code. The cyclical shift is then determined and the bit pattern which is associated with the cyclical shift is output. The method can be used in direct sequence spread spectrum communication.

Abstract: A low power consumption protocol for low power communication devices attached to an asynchronous network is described. In this protocol, a communication device is used as a high communication duty cycle Mediation Device (MD), thus permitting other communication devices to use a low communication duty cycle framing structure. The MD functions as a storage and retrieval service for messages between two devices when one device is not able to communicate. When the previously unavailable device becomes available, it can check in with the MD to retrieve any missed messages and respond to these messages accordingly. In a communication network, each of the low power communication devices can be configured to behave as MD's for a small amount of time. Sharing this responsibility among all communication devices in the network allows each device to maintain an low average communication duty cycle. This technique is applicable to a low power, low cost, zero-configuring, self-organizing, asynchronous network.