Abstract: A method includes sending a message from a first to at least one second cognitive radio apparatus to determine a channel to be used for sending data from the first to the second radio apparatus, the message sent over a first channel and comprising an advertisement of at least one second channel for use in sending the data from the first to the second radio apparatus, the advertisement comprising a corresponding proposition/evaluation bit for each second channel, receiving a reply from the second radio apparatus over the first channel, comprising an acceptance of one of the second channels with the corresponding proposition/evaluation bit, a rejection of the second channel and an advertisement of a third channel, or a rejection of the second channel without an advertisement of a third channel, and transmitting the data from the first to the second radio apparatus over an agreed upon second or third channel.

Abstract: Asymmetrical multicarrier interference avoidance in a communication from a network to a subscriber device is provided. The asymmetrical multicarrier interference avoidance technique comprises measuring signal-to-noise ratio interference values and sorting the measured values into two tables for selecting an anchor and a non-anchor frequency carrier pairs. The system is self-tuning based on changes in the network, the subscriber and the surrounding environment.

Abstract: An example avionic data communication method includes establishing a plurality of available channels using a channel controller. The channel controller also establishes a quality of service for each of the plurality of available channels. The channel controller then selects one of the available channels. The quality of service of the selected channel is not less than the quality of service of another channel within the plurality of available channels. The method then communicates a type of data using the selected channel.

Abstract: The present invention relates to a method for allowing a station (STA) operable in a plurality of frequency bands to perform a fast session transfer (FST) to a white space band in a wireless local area network (WLAN), and a station device therefore. When an FST is performed, if a band to which mobility is desired through the FST is a white space band, a multi-band element transmitted in an FST request message is suggested to additionally include particular white space information for available channel information acquisition, which is not used by a licensed user in the white space band. Said particular white space information may contain information that indicates whether a target channel is an available channel, and/or performance (apparatus type) in a white space band of a station that requests an FST.

Abstract: A cognitive radio (CR) communication apparatus and method is provided. A cognitive radio (CR) communication apparatus includes a signal receiving unit which receives signals from a primary user of a primary system and a secondary transmitter of a secondary system, the received signals including an element associated with at least one known signal of the secondary transmitter, and a determination unit which determines whether a signal of the primary user exists from among the received signals based on the element associated with the at least one known signal.

Abstract: A communication apparatus including a first communicator which communicates with a first other communication apparatus, a detector which detects, with respect to each of the frequency channels, a value of a parameter for evaluating a quality of a communication between the communication apparatuses, a determiner which determines, on the basis of the value of the parameter detected with respect to a corresponding one of the frequency channels by the detector, whether the quality of the communication between the communication apparatuses made by using each of the frequency channels is not less than a first threshold, and a communication controller which sends the first other communication apparatus data by means of the first communicator, once when a good-quality frequency channel is used, and repeatedly a plurality of times when a poor-quality frequency channel is used.

Abstract: A system, apparatus and method is disclosed for multiband wireless communication. Frequency bands and/or transmission formats are identified as available within a range for wireless communication. The system evaluates signal quality metrics for each frequency band and selects a communication method based on the evaluation. Multiple frequency bands and communication methods can be utilized by the system such that a combination of licensed, unlicensed, semilicensed, and overlapped frequency bands can be simultaneously used for communication. The system monitors communications and can report link performance for adaptive control of the selected communication methods.

Abstract: The peak detection method using blind source separation extracts true peaks from noisy peaks in a more robust way that does not require any a priori information. Information regarding true peak location is obtained by thresholding the output of a wavelet transform. The value of the threshold is dependent on noise variance. While noise variance is normally unknown, the present method implements a blind source separation technique to calculate the noise variance. The blind source separation technique does not require information of the incoming signal or the channel noise, and hence is suitable for CR (cognitive radio) peak detection.

Abstract: For each nth carrier frequency bandwidth of a set of N carrier frequency bandwidths there is determined interference (in which n is an index and N is an integer greater than one). For each nth carrier frequency bandwidth, there is determined a number of cells operating on the nth carrier frequency bandwidth. The number of carrier frequency bandwidths available for selection is reduced to less than N by excluding from consideration at least one carrier frequency bandwidth based on the determined number of cells operating thereon. From the reduced number is selected a carrier frequency bandwidth for use by a host femto cell. In various specific embodiments: the carrier frequency bandwidth excluded from consideration has a maximum number of cells operating thereon; and/or closed subscriber group cells having path loss exceeding a threshold are excluded from the per carrier count; and/or only femto cells are included in the per carrier count.

Abstract: Described is a system and method for assigning a frequency to an access point in a wireless network comprising a plurality of access points. The system and method includes accessing a rule-base to obtain a set of rules for the wireless network, accessing a license database to obtain information about relevant wireless nodes in a region, creating a list of possible primary node frequencies from a list of frequencies associated with primary wireless nodes in the license database, creating a list of possible secondary node frequencies from a list of frequencies associated with secondary wireless nodes in the license database, identifying a list of clear frequencies from a set of unused frequencies, selecting a frequency from frequencies in the lists of possible primary node frequencies, possible secondary node frequencies, and clear frequencies and registering the frequency in the license database.

Abstract: A method of operating a wireless communication device comprises storing initial data in a first wireless channel table that associates a geographic identifier, a network availability signal, and a first wireless communication channel. New data is received that associates the geographic identifier, the network availability signal, and a second wireless communication channel. The initial data is compared to the new data to determine that the first wireless communication channel in the initial data changed to the second wireless communication channel associated in the new data. A conditional statement is generated that directs the wireless communication device to utilize the first wireless communication channel for the geographic identifier if a performance metric of the second wireless communication channel fails to meet a performance standard.

Abstract: Embodiments include processes, systems, and devices for reshaping virtual baseband signals for transmission on non-contiguous and variable portions of a physical baseband, such as a white space frequency band. In the transmission path, a spectrum virtualization layer maps a plurality of transmission components associated with a transmission symbol produced by a physical layer protocol to sub-carriers of the allocated physical frequency band. The spectrum virtualization layer then outputs a physical transmission symbol composed of time-domain samples derived from the mapped frequency components and a cyclic prefix. In the receive path, a time-domain symbol received on the physical baseband is reshaped and equalized by the virtual spectrum layer in order to recompose a time-domain samples of a transmission stream in the virtual baseband.

Abstract: This disclosure provides systems, methods, and apparatus for antenna selection for different radio access technologies. An apparatus can include a plurality of antennas and a plurality of radio access technology modules each configured to communicate according to a different radio access technology. The apparatus further includes a controller configured to switch communication circuits of each of the radio access technology modules to communicate via a corresponding one or more of the plurality of antennas. The apparatus further includes a switching manager configured to manage a plurality of switch configurations each defining a mapping between each of the radio access technology modules and the antennas. The switching manager is further configured to store a switch configuration used for a first radio access technology module and cause the controller to maintain the switch configuration in place in response to a network handover. Other aspects, embodiments, and features are also claimed and described.

Abstract: Disclosed is a method for setting configuration parameters for a communication network. Performance data is periodically obtained, the performance data including information concerning performance at least in some part of said communication network. On the basis of said performance data, an appropriate set of configuration parameters is automatically chosen for at least one network element of the communication network amongst at least two predefined sets of configuration parameters. The chosen appropriate set of configuration parameters is automatically provided for use in said at least one network element, if said appropriate set is not already in use in said at least one network element.

Abstract: An adaptive scheme controls the transmission of interference management messages by wireless nodes. For example, the adaptive scheme may be used to determine whether and/or how to transmit resource utilization messages. Such a determination may be based on, for example, comparison of a quality of service threshold with a current quality of service level associated with received data. A quality of service threshold may be adapted based on the effect of previously transmitted resource utilization messages. A quality of service threshold for a given wireless node may be adapted based on the frequency at which the wireless node transmits resource utilization messages. A quality of service threshold for a given wireless node may be adapted based on information received from another wireless node. An adaptation scheme also may depend on the type of traffic received by a given wireless node. A quality of service threshold also may be adapted based on throughput information.

Abstract: Methods and systems of analyzing an operating environment of wireless communication equipment in a wireless communication system are provided. A stimulus in the operating environment at a location of the wireless communication equipment is sensed and linearly expanded in Slepian sequences using a multitaper spectral estimation procedure. A singular value decomposition is performed on the linearly expanded stimulus, and a singular value of the linearly expanded stimulus provides an estimate of interference at the location of the wireless communication equipment.

Abstract: A method and system for allowing a client device to establish a direct communications session such as Wi-Fi Direct service using the 5 GHz band. In one embodiment, a client device first establishes a direct communications session, in the 2.4 GHz band with another client device, and then, based on the content used in that service, establishes a 5 GHz service if needed.

Abstract: A method and system of cognitive communication for generating non-interfering transmission, includes conducting radio scene analysis to find grey spaces using external signal parameters for incoming signal analysis without having to decode incoming signals. The disclosed cognitive communications system combines the areas of communications, signal processing, pattern classification and machine learning to detect the signals in the given spectrum of interests, extracts their features, classifies the signals in types, learns the salient characteristics and patterns of the signal and predicts their future behaviors. In the process of signal analysis, a classifier is employed for classifying the signals. The designing of such a classifier is initially performed based on selection of features of a signal detected and by selecting a model of the classifier.

Abstract: Assigning CDMA channel codes in a multiple beam zone sector such that they may be reused within the same sector. In an exemplary embodiment, the method includes configuring directional antennas in a cell sector to provide multiple beam zones in a cell sector and assigning channel codes for use within the beam zones such that each channel code is assigned for use in only one beam zone of any set of three consecutive beam zones in the cell sector. The reassignment is preferable conditioned upon the mobility status of the user. This effectively reduces the inter-user interference by ensuring at least two intervening beam zones are located between zones that are using the same channel codes, and that the second user is not mobile. The channel codes may be Walsh codes or quasi-orthogonal functions (QOFs).

Abstract: Embodiments include processes, systems, and devices that allow a white space base station to request available frequency ranges for white space transmission in a local area. A white space finder service models a primary user device's transmission signal propagation area using terrain data associated with the local area of the primary user device. The white space finder service also determines, based on the location of the white space base station and the modeled propagation area, one or more locally available, non-interfering frequency ranges and provides them to the white space base station. The white space base station compares the provided frequency ranges to policies and selects one or more of the available frequencies that accommodate the policies. The white space base station also maps the transmission frequency ranges to virtual frequency ranges for transmission by a software-defined radio employing spectrum virtualization.

Abstract: A wireless communication system that concurrently communicates information in multiple regulatory domains to facilitate audio/video media streaming and other high bandwidth operations. One domain may be licensed and the other may be unlicensed. Transmission in the licensed domain may occur in white space in the domain, and the amount of information transmitted in that domain may be limited by regulations. The amount of information conveyed in the licensed domain may also depend on channel conditions in either or both of the domains. As a result, the relative amount of information transmitted in each domain may vary dynamically. The system includes a transmitter that dynamically determines weighting coefficients applied to each of a plurality of channels to set power levels in both domains to achieve a desired metric for the overall communication. A corresponding receiver assembles the substreams into a stream that can then be displayed or otherwise processed.

Abstract: According to embodiments of the present invention, a method for identifying one or more frequency bands in a received signal. The method comprising: calculating a wavelet product of the received signal; setting a threshold for local maxima of the wavelet product; and detecting one or more edges in the received signal based on local maxima of the wavelet product which are greater than the threshold to identify one or more frequency bands in the received signal. A corresponding apparatus and computer program product are also provided. Embodiments also relate to a method for evaluating performance of a method for identifying one or more frequency bands in a received signal. A corresponding apparatus and computer program product are also provided.

Abstract: A wireless communication device includes a communication unit, a detection unit, and a control unit. The communication unit communicates with another wireless communication device by use of a wireless channel selected from wireless channels. The detection unit detects field intensities of first wireless channels. The control unit calculates a field intensity of a second wireless channel based on the field intensities of the first wireless channels, wherein the first wireless channels do not include the second wireless channel.

Abstract: [Problem] Provided are a base station, a terminal station, a radio system, a radio control method and a storage medium capable of estimating with high accuracy a utilization status of a frequency band which is assigned to or of which a preferential use is permitted to another radio system. [Solution] A base station of a radio system, which estimates a utilization status of a frequency band which is assigned to or of which a preferential use is permitted to another radio system, wherein the base station comprises an estimation means which estimates a utilization status of said frequency band, on the basis of a received signal power ratio between a received signal power value of the other radio systems and a received signal power value of the own radio system, which is obtained at least one sensing apparatus.

Abstract: Some embodiments concern a method of transmitting electrical signals. The method can include: using a global positioning satellite receiver to determine a first location of a first electrical device; using a first transmitter to transmit the first location to a first server; using a receiver to receive information identifying at least one first unused frequency at the first location from the first server; selecting a first transmission frequency from the at least one first unused frequency; and communicating the first transmission frequency to a user. Other embodiments are disclosed in this application.

Abstract: Isolation techniques for multiple co-located radio modules are disclosed. For example, an apparatus may include an antenna, a first transceiver to communicate wirelessly across a first link, a second transceiver to communicate wirelessly across a second link, a shared antenna structure operative to allow the first transceiver and the second transceiver to share the antenna for simultaneous operations, and an active signal canceller operative to generate a cancellation signal to cancel an interference signal for a radio-frequency coupling channel between the first and second transceivers. Other embodiments are disclosed and claimed.

Abstract: Systems and methods according to the exemplary embodiments enable non-cognitive radio devices to operate as if they were cognitive radio devices. A pilot radio device analyzes a local radio environment and broadcasts a spectrum map message which indicates, for example, available radio resources in the local radio environment. A non-cognitive radio device receives the spectrum map message and uses the information in the spectrum map message to select a radio resource for its own transmissions and/or receptions.

Abstract: A plurality of frequencies are generated at a wireless device and a frequency which a user perceives as the loudest frequency is determined. A first frequency range is selected comprising a first minimum frequency and a first maximum frequency. A ringtone is processed to shift the second frequency range to within the first frequency range, wherein an average frequency of the processed ringtone is the determined loudest frequency.

Abstract: There is disclosed a system and method for improving wireless system capacity by reducing collisions where the Signal to Interference Ratio (SIR) is high in systems having a channel reuse of 1. By ordering the channel assignment in each of the interfering cells according to a pattern, for example, according to the distance from a base station (determined by power levels), the mobile stations will become paired on the same channel in a manner to reduce interference between them. In one embodiment, this intelligent assignment is accomplished by assigning mobile stations in one cell such that the mobile station having the strongest signal is assigned channel A while in the interfering cell the mobile station with the weakest signal is assigned to channel A. In another embodiment, certain preferred mobile stations are assigned either interference-free channels or channels paired with weak interference mobile stations.

Abstract: An apparatus configured to operate under cognitive radio principles. The apparatus includes a processor configured to perform spectrum sensing in the apparatus to produce spectrum sensing data; and first circuitry configured to share the spectrum sensing data with other apparata.

Abstract: In general, techniques are described for sensing wireless communications in television frequency bands, which may be implemented by a sensing device comprising a sensing unit, a power spectral density (PSD) estimation unit, a filter unit, a candidate selection unit, an analysis unit and a decision unit. The sensing unit senses a signal in the television frequencies bands. The PSD estimation unit calculates an estimate of a PSD for the sensed signal. The filter unit filters the estimated PSD. The candidate selection unit analyzes the filtered PSD to identify a candidate frequency representative of a potentially in use frequency. The analysis unit computes a test statistic for the candidate frequency. The decision unit compares the test statistic to a threshold to identify whether the candidate frequencies is actively in use by wireless communication devices.

Abstract: A method and system for allowing a client device to establish a direct communications session such as Wi-Fi Direct service using the 5 GHz band. In one embodiment, a client device first establishes a direct communications session, in the 2.4 GHz band with another client device, and then, based on the content used in that service, establishes a 5 GHz service if needed.

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for verification signaling, for example, in wireless communications in a television white space (TVWS) network.

Abstract: An electronic device may contain wireless communication circuitry. The wireless communication circuitry may include radio-frequency transceiver circuitry coupled to multiple antennas. The electronic device may use the multiple antennas to make received signal power measurements. The signal power measurements may be made for each frequency in a list of frequencies used most recently by the electronic device in conveying data traffic between the electronic device and a wireless network. Based on received signal power measurements, the electronic device may select which frequency to use in performing system acquisition operations to attempt to establish a wireless communications link between the electronic device and the wireless network.

Abstract: A network virtualization method in a wireless communication system includes aggregating sets of uplink and downlink flows on a cellular basestation into groups; allocating wireless resources to each of the sets as a respective basestation slice; and enabling each of the sets of flows to be under a distinct administrative entity.

Abstract: A network access node selects one chunk of spectrum from a plurality of chunks of spectrum to be a primary chunk for a particular cell; transmits in the primary chunk from a broadcast channel BCH that contains information needed by a terminal to at least perform initial cell access; and uses a synchronization channel SCH to indicate which chunk of the plurality of chunks is the primary chunk. A user equipment receives a SCH in a particular chunk of spectrum; determines from it that one chunk is a primary chunk for a particular cell; tunes its receiver to a BCH in the primary chunk and uses information received on the BCH to obtain initial access to the particular cell. In various embodiments the SCH is only in the primary chunk or the SCH has some indication (e.g., cell ID or relative position of primary chunk) telling which chunk is primary.

Abstract: A method for managing radio resources of a base station is provided. The method includes evaluating a radio environment between a base station and at least one neighboring base station or a radio environment between the base station and terminals connected to the base station, if the evaluated radio environment does not meet predetermined criteria, selecting a new radio resource, deactivating the existing radio resource, and reactivating the new radio resource. Accordingly, the radio resources can be efficiently managed.

Abstract: A system comprises a communication device that chooses a parameter setting from a set of available parameter settings. The system may include multiple communication devices, and each available parameter setting may have an associated cost. The communication device may receive parameter setting information from one or more other communication devices in the system, and the parameter setting information may identify the parameter setting being used by the one or more communication devices in the system. The communication device may choose a parameter setting that is associated with the lowest cost based on the parameter setting information received from the one or more other communication devices in the system.

Abstract: There is provided a method, an apparatus and a computer program product, which introduces a phase shift between radiation phase patterns of associated antennas which are applicable in transmitting and/or receiving radio frequency signals simultaneously via an air interface, wherein the phase shift is introduced in order to obtain orthogonality between the associated radio frequency signals.

Abstract: A system including a plurality of filter modules to respectively communicate with a plurality of antennas, filter signals from channels other than a communication channel of a first wireless network, where the communication channel includes a first channel and a second channel, and generate a plurality of signals. A sensing module senses, based on the plurality of signals, whether radio frequency signals from a second network are present in at least one of the first channel and the second channel, and generates a plurality of control signals indicating presence or absence of the radio frequency signals in at least one of the first channel and the second channel. A channel identification module determines, based on the plurality of control signals, availability of the first channel and the second channel in response to whether the radio frequency signals are present in the first channel and the second channel.

Abstract: Functionality is described by selecting a channel in an environment in which non-privileged entities have subordinate access rights to spectrum compared to privileged entities. The functionality operates by identifying spectrum that is available to all nodes involved in communication (where the nodes are associated with non-privileged entities). The functionality then generates a suitability assessment for each candidate channel within the available spectrum. The functionality selects a channel having the most desirable suitability assessment. The functionality can form a suitability assessment for a candidate channel of arbitrary width, e.g., by combining suitability assessments associated with constituent spectrum units within the candidate channel.

Abstract: A method includes sending a message from a first cognitive radio apparatus to at least one second cognitive radio apparatus, the message being sent over a first communication channel and containing an advertisement of at least one second communication channel for use in sending data from the first cognitive radio apparatus to the at least one second cognitive radio apparatus. The method further includes receiving a reply from the at least one second cognitive radio apparatus over the first communication channel, where the reply contains one of an acceptance of one of the at least one second communication channels, a rejection of the at least one second communication channel and an advertisement of at least one third communication channel, or a rejection of the at least one second communication channel without an advertisement of at least one third communication channel.

Abstract: A beacon with a transceiver for radio communication with vehicle OBUs of a road toll system, wherein the transceiver has a directional antenna and is configured to communicate wirelessly with OBUs on a selected channel directed via the directional antenna wherein the transceiver is additionally equipped with an omnidirectional antenna and is configured to transmit, before the beginning of a directional radio communication, by means of the omnidirectional antenna a channel reservation message and/or to check, before the beginning of a directional radio communication, by means of the omnidirectional antenna whether the selected channel is free.

Abstract: In a cognitive radio communication device, before a communication link for the cognitive radio communication is established, a control channel which is a common channel which can be used by a plurality of cognitive radio communication devices is detected. By exchanging sensing information and sensing control information among the plurality of radio communication devices using the detected common channel, the information is shared. The plurality of cognitive radio communication devices share the sensing information and the sensing control information, and use the information for determining a channel used for spectrum monitoring and data communication, and the like.

Abstract: An electronic device may contain wireless communication circuitry. The wireless communication circuitry may include radio-frequency transceiver circuitry coupled to multiple antennas. The electronic device may use the multiple antennas to make received signal power measurements. The signal power measurements may be made for each frequency in a list of frequencies used most recently by the electronic device in conveying data traffic between the electronic device and a wireless network. Based on received signal power measurements, the electronic device may select which frequency to use in performing system acquisition operations to attempt to establish a wireless communications link between the electronic device and the wireless network.

Abstract: A dynamic spectrum access method for cooperative wireless devices. In one example, a method of establishing a wireless network includes scanning and analyzing a selected frequency band to detect non-cooperative signals within the selected frequency band, determining whether a waveform including one or more radio frequency (RF) carriers and a plurality of intermodulation tones (for multi-carrier waveforms) can be placed within the selected frequency band without interfering with any detected non-cooperative signals, and selecting transmit frequencies for the plurality of RF carriers responsive to obtaining a non-interfering waveform placement solution.

Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.

Abstract: A wireless communication apparatus includes a communication unit, a detection unit, and a control unit. The communication unit wirelessly communicates with another wireless communication apparatus using a first wireless channel. The detection unit detects electric field intensities of wireless channels except for the first wireless channel. The control unit calculates an electric field intensity of the first wireless channel based on the electric field intensities of the wireless channels detected by the detection unit.

Abstract: Techniques for use in improving audio quality with use of an acoustic leak compensation (ALC) system in a mobile device are described. The mobile device includes a receiver and a microphone which is acoustically coupled to the receiver. A change in a signal power of signals received at the microphone is detected. In response to the detecting, a probe signal is enabled, and a frequency response between the receiver and the microphone is estimated using the probe signal as an input. Filter coefficients of a filter are calculated based on the estimated frequency response, and the calculated filter coefficients are applied to the filter. The filter type may be selected from a plurality of filter types based on an estimated signal-to-noise ratio (SNR) of the microphone signal.

Abstract: A method for reporting link information in a communication system including a communication terminal and a plurality of transceivers with each of which the communication terminal can communicate over a respective communication link; the method comprising: the communication terminal determining link information for each of the communication links; and the communication terminal periodically transmitting link messages, each link message containing link information for a first set of the communication links, and the link messages being formatted such that groups of successive link messages collectively contain link information for a larger set of the communication links.