Abstract: According to one embodiment, there is provided a wireless communication apparatus for making wireless connection in the first connection attempt state wherein a connection request is attempted using a predetermined frequency channel or the second connection attempt state wherein a connection request is attempted using a plurality of frequency channels. A frame generation unit generates a connection request frame which includes the first field for requesting a search of the plurality of frequency channels in response to occurrence of interference, and the second field indicating whether a corresponding frequency channel is a channel wherein occurrence of interference has been detected. A transmission unit transmits the connection request frame using the predetermined frequency channel in the first connection attempt state, and transmits the connection request frame using the plurality of frequency channels in the second connection attempt state.

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 communications device is disclosed that implements a phase-locked-loop to multiply a clock signal provided to a power management unit (PMU) by a variable integer value. Multiplying the PMU clock signal provides a second clock signal where the second clock signal is characterized by a fundamental component with one or more harmonics of the fundamental component that differ from the fundamental component and the one or more harmonics of the PMU clock signal. The fundamental component with one or more harmonics of the second clock signal does not occupy the same communication channel as the transmission communication signal of the communications device. Thus, minimizing the degradation of the transmission communication signal.

Abstract: A method for link adaptation includes: classifying a radio channel; setting a set of link adaptation modes; and selecting a corresponding link adaptation mode according to a radio channel type. An apparatus for link adaptation includes: a classification module for performing a classification on a radio channel; a setting module for setting a set of link adaptation modes; and a mode selection module for selecting a corresponding link adaptation mode from the setting module according to a radio channel type of the classification. The present invention accordingly selects effective link adaptation modes in accordance with different types of radio channels, and is able to ensure to implement the maximum system throughput in different fading channels and maintain the stable and reliable link quality.

Abstract: A method, in the case of which it is monitored in a wireless adapter connected to a field device whether, in the context of communication with the field device, a status change of the field device is being reported. In case a status change has been reported, the wireless adapter queries for expanded status information of the field device. The expanded status information is transmitted event-controlled from the wireless adapter to a superordinated communication unit and provided through such to an evaluation tool, in case a comparison of the expanded status information with a status pattern adapted specifically for the field device shows that the relevant, expanded status information should be evaluated.

Abstract: The present invention provides a control function in an access point, switch, or like node on a wireless local area network. The control function operates to ensure frames transmitted by a user terminal are transmitted using an appropriate transmission priority scheme. The control function will assist and provide an appropriate priority level to the user terminal. Frames transmitted from the user terminal are passed through the control function, which will analyze priority level information provided in the frames to determine if the frames were transmitted using the appropriate transmission priority scheme. An enforcement action may be taken in response to identifying frames that were not transmitted using the appropriate transmission priority scheme.

Abstract: An evaluation device is adapted for providing a transceiver system with performance information thereof. The transceiver system models a channel between a transmitter and a receiver thereof using Nakagami distribution with a fading parameter. The evaluation device includes a signal-to-noise ratio (SNR) computing module, a capacity computing module, and an output module. The SNR computing module is operable to set an average SNR for the channel between the transmitter and the receiver, and to compute an expected value and variance of an effective SNR of the transceiver system according to the fading parameter and the average SNR. The capacity computing module is operable to compute an outage capacity of the transceiver system based upon the expected value and the variance of the effective SNR and a transmission outage parameter. The output module is operable to provide the transceiver system with the average SNR and the outage capacity.

Abstract: A intelligent backhaul radio is disclosed, which can operate by zero division duplexing for use in PTP or PMP topologies, providing for significant spectrum usage benefits among other benefits. Specific system architectures and structures to enable active cancellation of multiple transmit signals at multiple receivers within a MIMO radio are disclosed. Further disclosed aspects include the adaptive optimization of cancellation parameters or coefficients.

Abstract: A method and apparatus are provided for a wireless communication system including a base station and at least one user equipment. A Channel Quality Indicator (CQI) table can be generated so that only an index corresponding to the measured CQI needs to be fed back to the base station. The CQI tables proposed herein may be suitable to different channel statistics, different Multiple Input Multiple Output (MIMO) mode and may be optimized based on either performance or implementation complexity. Multiple CQI tables may be formed into one compound CQI table. The CQI tables may be stored at both a base station and user equipment. The base station can select a CQI table from the set of tables. The base station signals the selection of the CQI table to the user equipment and the user equipment feeds back indices from the selected CQI table to the base station.

Abstract: A spatio-temporal random voting scheme is provided that incorporates location distribution, spatial randomness, and temporal randomness in the collection of information from a plurality of sensing devices within the cognitive network. The region is divided into a plurality of sectors, where each sector is a portion of the region. A subset of sectors is selected from the plurality of sectors in the region to provide spatial randomness. A device is randomly selected from each sector in the subset of sectors to provide additional spatial randomness to the information collection process. Temporal randomness may be introduced by randomly selecting a timeslot within a sensing window period in which devices are to scan a frequency spectrum band to determine if a signal energy above a threshold is detected. Sensing reports are then collected from the selected sensing devices and used to determine whether the frequency spectrum band is available or in use.

Abstract: A system configured to receive a request to identify a quality of service (QoS) policy to be used to process traffic that is received from a user device associated with another network; obtain an interoperable QoS policy, where the interoperable QoS policy identifies a first QoS level, associated with the other network, that corresponds to a type of traffic received from the user device; obtain, from the interoperable QoS policy, a second QoS level that corresponds to the first QoS level; and send, to a device, an instruction to process the traffic based on the second QoS level.

Abstract: The present invention relates to a node in a wireless communication system, the node having a central point and comprising at least two antenna functions. Each antenna function is arranged to cover a corresponding sector area, the sector areas being positioned around the central point successively such that each sector area is adjacent to at least one other sector area separated by corresponding borders. The polarization of at least one of said antenna functions is variable between the borders of the corresponding sector area such that for each border, the polarizations of the antenna functions at each side of the border are essentially orthogonal at the border. The present invention also relates to a corresponding wireless communication system and corresponding antenna functions.

Abstract: Disclosed is a method for smoothly switching between services to allow networks or devices to coexist. The method of switching between services of a television band device (TVBD) network or device includes: receiving a request for switching between services of the TVBD network or device from a coexistence manager (CM); and transmitting a response with respect to the request to the CM, wherein the services include an information service obtaining, by the TVBD network or device, neighbor information of the TVBD network or device from the CM and a management service providing measurement results to the CM by the TVBD network or device, and the response includes an indicator indicating whether or not the request has been successfully processed.

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: A system that incorporates teachings of the present disclosure can include, for example, an apparatus having a matching network adapted to reduce a magnitude of a signal reflection at a port of the matching network. The matching network can have one or more controllable variable reactive elements. A controller can be adapted to determine reflection coefficient information from incident and reflected waves sampled at the port of the matching network, and follow at least one cycle of a coarse tune process for generating one or more control signals to tune one or more reactances of the one or more controllable variable reactive elements. Additional embodiments are disclosed.

Abstract: For interference control, a sector m estimates interference observed from terminals in neighbor sectors and obtains an interference estimate. Sector m may generate an over-the-air (OTA) other-sector interference (OSI) report and/or an inter-sector (IS) OSI report based on the interference estimate. Sector m may broadcast the OTA OSI report to the terminals in the neighbor sectors. These terminals may adjust their transmit powers based on the OTA OSI report. Sector m may send the IS OSI report to the neighbor sectors, receive IS OSI reports from the neighbor sectors, and regulate data transmissions for terminals in sector m based on the received IS OSI reports. Sector m may control admission of terminals to sector m, de-assign admitted terminals, schedule terminals in sector m in a manner to reduce interference to the neighbor sectors, and/or assign the terminals in sector m with traffic channels that cause less interference to the neighbor sectors.

Abstract: A method and an apparatus for feeding back channel information in a wireless communication system are provided. The method includes calculating an average Signal to Interference and Noise Ratio (SINR), determining a Modulation and Coding Scheme (MCS) level corresponding to the average SINR, determining an MCS level meeting a predefined condition among MCS levels equal to or less than the determined MCS level, and reporting a channel quality indicator representing the determined MCS level to a base station.

Abstract: The present invention relates to simulation on a lab workbench of conditions that would be encountered by a mobile device during a so-called drive test, which involves transporting the mobile device along a course so that it encounters fading and changing wireless access points used normally to connect the mobile device to a wireless network but in this case used to locate the device. The instrument and method also support parametric testing of transceivers used for WiFi positioning and, optionally, GNSS positioning by the same mobile device used for WiFi positioning.

Abstract: The present invention relates to a wireless communication system and, more particularly, to a method for enabling a terminal to measure the strength of an interference signal in a wireless communication system and a device therefor, wherein the method comprises the steps of: measuring a first interference strength, which is the strength of an interference signal received from a first base station group; calculating a second interference strength, which is the strength of an interference signal received from a second base station group; and correcting the first interference strength on the basis of the second interference strength.

Abstract: A transmitter (20) includes a peak reduction section (30), a predistorter (98), and an amplifying section (102) biased by a variable bias signal generator (118). The peak reduction section (30) is controlled by a signal magnitude threshold (36) that defines maximum magnitudes for local peaks (32) of a reduced-peak communication signal (38). The bias signal generator (118) is controlled by a bias control signal (110). Both the signal magnitude threshold (36) and the bias control signal (110) are derived from a common reduced bandwidth (50) peak-tracking signal (42). The peak-tracking signal (42) is derived from an inflated-peak communication signal (26). The predistorter (98) applies distortion to the reduced-peak communication signal (38) that is configured, at least in part, by the bias control signal (110).

Abstract: A wireless communication apparatus is provided that includes a plurality of antennas and at least one receive or transmit circuit. The apparatus further includes a controller configured to: determine one or more performance characteristics associated with a first antenna while the circuit is connected to the first antenna; switch the circuit from the first antenna to a second antenna; determine one or more performance characteristics associated with the second antenna after the switch; compare the performance characteristics associated with the antennas; determine whether to maintain the switch to the second antenna or to switch the circuit back to the first antenna; and determine a duration of time to maintain a connection between the selected antenna and the circuit based, at least, on one or more performance characteristics. Other aspects, embodiments, and features are also claimed and described.

Abstract: A wireless communication apparatus is provided including: a radio receiver configured to acquire, from a base station, a first information indicating a fixed number identifying quantity of sub-carrier bands to be selected for channel quality reporting; a reception quality measurer configured to measure channel quality of each of a plurality of sub-carrier bands within a communication band; a subcarrier selector configured to select sub-carrier bands from the plurality of sub-carrier bands based on the measured channel quality, wherein quantity of the selected sub-carrier bands matches the quantity of sub-carrier bands identified by the fixed number; a modulator configured to modulate a second information indicating channel quality of the selected sub-carrier bands and a third information indicating positions of the selected sub-carrier bands according to a modulation scheme; and a radio transmitter configured to report to the base station the second and third modulated information.

Abstract: A method, receiver and program for processing radio signals to identity an n-ray channel condition. The method comprises: receiving signal samples and estimating a plurality of channel taps from the samples; estimating for each of the channel taps a signal power and a disturbance power; filtering the signal power to provide a filtered signal power quantity; filtering the disturbance power to provide a filtered disturbance power quantity; using the filtered power quantities to determine n strongest channel taps; generating first and second comparison parameters using the strongest channel taps and at least one other channel tap; providing a comparison result based on the first and second comparison parameters and a threshold value, and; identifying an n-ray channel condition from the comparison result.

Abstract: Apparatus is provided comprising at least one antenna for receiving a low frequency electromagnetic field. A measuring circuit is connected to the at least one antenna for measuring the strength of the low frequency electromagnetic signal received by the antenna. A memory stores a representation of the noise in the output of the measurement circuit. A corrector corrects the measurement provided by the measuring circuit in accordance with the noise representation stored in the memory.

Abstract: The present invention relates to a method for communicating between a primary station and at least one secondary station, comprising the steps of (a) at the primary station, requesting the secondary station to transmit channel quality information representative of the channel quality and, (b) at the secondary station, responsive to the request of step (a), transmitting to the primary station the channel quality information, wherein step (b) comprises sub-step (b1) wherein the secondary station further transmits with the channel quality information an indication of a secondary station buffer status.

Abstract: A wireless communication device includes a demodulation unit which demodulates a predetermined reception frequency, an S/N improvement processing unit which performs an S/N improvement process on a demodulated signal output from the demodulation unit, a first filter which performs an adaptive operation with respect to a frequency having a largest amplitude in a signal output from the S/N improvement processing unit, and outputs a filter coefficient updated by the adaptive operation, a controller which calculates the frequency of the largest amplitude defined by the filter coefficient output from the first filter, and controls the demodulation unit to update the reception frequency so as to reduce a difference between the frequency having the largest amplitude and a predetermined frequency, and a second filter which limits a range of a frequency bandwidth of the demodulated signal based on the frequency having the largest amplitude.

Abstract: To start secondary use of a spectrum without causing an adverse effect on a communication service for primary usage, provided is a communication control method including the steps of acquiring data related to a communication environment surrounding a first communication device at the first communication device, determining that a second communication service using a part or whole of a spectrum assigned to a first communication service is available when the acquired data related to the communication environment satisfies a first condition, and permitting usage of the second communication service when the data related to the communication environment satisfies a second condition at the first communication device or a second communication device.

Abstract: UEs are adapted to facilitate detection and handling of deconstructive impacts of default weight factors employed before downlink and uplink synchronization is achieved in closed-loop transmission diversity communications. According to one example, a UE may receive transmissions sent using a default weight factor for transmission diversity. The UE may determine whether the default weight factor is causing a deconstructive impact on signal-to-interference ratio estimates for the received transmissions. When it is determined that the default weight factor is causing the deconstructive impact on the signal-to-interference ratio estimates for the received transmissions, the UE may employ an alternate closed-loop transmission diversity (CLTD) mode. Other aspects, embodiments, and features are also included.

Abstract: UEs are adapted to facilitate calculation of signal-to-interference ratio (SIR) estimates in closed-loop transmission diversity (CLTD) communications before downlink and uplink synchronization is achieved. A UE may receive a transmission sent using transmission diversity. According to one example, the UE may calculate a plurality of signal-to-interference ratio (SIR) estimates for the received transmission, where each signal-to-interference ratio estimate is calculated using a different weight factor. The UE may further select one of the calculated signal-to-interference ratio (SIR) estimates to be employed for the received transmission. According to another example, the UE may calculate a signal-to-interference ratio (SIR) estimate for the received transmission without employing any weight factor. Other aspects, embodiments, and features are also included.

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: Adjustment of a downlink transmit power parameter, such as a ceiling level, is disclosed. Signal-to-noise type information and committed power information can be employed to determine the ceiling level adjustment. A ceiling level can be a predetermined cap on transmission power for downlink channels between a user equipment and a base station. Where there is sufficient headroom in total transmission power and a power level greater than the predetermined ceiling can be effective, the ceiling can be adjusted to greater values than the predetermined value. Where total transmission power is more committed, ceiling adjustment can be prevented. Further, where there is no adequate benefit from increasing the ceiling, the adjustment of the ceiling can be prevented. While some instances can result in optimized transmission levels below the ceiling, instances can also be accommodated where the ceiling is to be increased.

Abstract: In a mobile communication device a loopback technique is used to enable the receive chain circuitry and digital baseband block to perform self tests on the transmit chain circuitry of the same mobile communication device for 2G and 2.5G operating Bands and channels. A transmit chain circuit is set to transmit a selected receive Band channel, which is attenuated via a loopback path within the mobile communication device's front end module and, in some embodiments, via a leakage signal path between adjacent or proximate LNA inputs of separate receive chain circuits.

Abstract: Embodiments of the present invention disclose an interference elimination method and apparatus for a multi-antenna system. The method includes: generating an equalization coefficient according to a baseband signal received on a receiving antenna, a channel estimation matrix, and an obtained cross-correlation matrix of transmitted signals of a downlink channel on multiple transmit antennas; and performing interference elimination processing on the baseband signal according to the equalization coefficient.

Abstract: The present disclosure relates to amplitude based pre-distortion calibration of an RF communications terminal, such as a cell phone, by transmitting a first standard RF transmit burst from the RF communications terminal to an RF test instrument, which assimilates the first standard RF transmit burst. A calibration control system extracts information regarding the first standard RF transmit burst from the RF test instrument; determines amplitude based distortion of the RF communications terminal using the extracted information; determines amplitude based pre-distortion calibration information using the determined amplitude based distortion; and calibrates the RF communications terminal using the amplitude based pre-distortion calibration information. By using a single-shot transmit burst, calibration times may be minimized.

Abstract: A wireless communications includes a first wireless communications and a second wireless communications. The first wireless communications module transmits or receives a first wireless signal in a first frequency band selected from a first frequency range. The second wireless communications module transmits or receives a second wireless signal in a second frequency band selected from a second frequency range, and adjusts a transmission power of the second wireless signal in response to that a frequency offset between the first frequency band and the second frequency band falls within a predetermined range. The first wireless communications module is further configured to determine an in-band range in the overlapping part of the first and second frequency ranges, and a transmission power of the second wireless signal is adjusted in response to a frequency offset between the first frequency band and the second frequency band.

Abstract: Disclosed are an apparatus and method of performing a data channel change-over procedure. One example method of operation may include detecting an abnormality in an active data communication channel established between at least two endpoint devices. The method may further provide selecting a next available data communication channel based on at least one data channel metric and transmitting at least one change-over message via an active control channel established between the at least two endpoints. The method may further include transmitting subsequent data messages over the next available data communication channel.

Abstract: Embodiments of a system and methodology are disclosed for aperiodic (i.e., non-periodic) feedback of channel-side information, such as channel rank information, to a base station by having the receiver/UE initiate the feedback instead of using a scheduled feedback approach. The autonomous feedback of channel-side information may use one of several different types of physical channel structures for uplink scheduling requests, such as those being discussed for inclusion in the emerging LTE platform standard.

Abstract: A home base station receives signal to interference and noise ratio data from at least one access terminal, determines whether a transmission power of the home base station should be adjusted based on the received signal to interference and noise ratio data, and then adaptively adjusts the transmission power of the home base station based on the received signal to interference and noise ratio data.

Abstract: The present invention relates to a method of analyzing interference between heterogeneous wireless communication systems, including receiving, by an interference analysis unit, interference parameters from a parameter input unit; receiving, by the interference analysis unit, polarized information from a polarized information input unit and calculating a Polarized Mismatch Loss Factor (PMLF) between a transmission antenna of an interference transmitter and a reception antenna of a victim receiver; and analyzing, by the interference analysis unit, an interference influence of the interference transmitter on the victim receiver based on the interference parameters and the PMLF. In accordance with the present invention, an interference influence between heterogeneous wireless communication systems using different polarized waves can be precisely analyzed by incorporating a loss characteristic according to a polarized mismatch between transmission and reception antennas into the interference influence.

Abstract: The present invention provides a transmission system, including: a transmitter including a transmitter filter; a receiver including a receiver filter; and a communicative coupling between the transmitter and the receiver; wherein the transmitter filter and the receiver filter are matched for noise reduction, and wherein the combined responses of the transmitter filter and the receiver filter satisfy the Nyquist criteria. Optionally, the transmitter filter includes a pulse shaping quasi digital finite impulse response filter. Optionally, the receiver filter includes an inductor-capacitor ladder based filter.

Abstract: The disclosure provides a method for implementing fast frequency sweeping of a mobile terminal, which includes: performing Received Signal Strength Indication (RSSI) measurements in communication frequency bands of a mobile terminal according to a preset first frequency sweeping step length, to obtain multiple first RSSI values (S10); making decisions on the first RSSI values to obtain second RSSI values (S11); sorting the second RSSI values; and performing frequency sweeping according to a sorted result (S12). The disclosure further provides an apparatus for implementing fast frequency sweeping of a mobile terminal, which includes: a first RSSI measuring unit, a RSSI deciding unit, a RSSI sorting unit and a frequency sweeping unit. The method and the apparatus for implementing fast frequency sweeping of the mobile terminal according to the disclosure perform the RSSI measurements according to the preset first frequency sweeping step length, and then sort the measured RSSI values.

Abstract: A transmitter (70) generates a time-varying, detroughed, biasing signal (154) for an RF power amplifier (10) so that the RF power amplifier (10) is biased in accordance with an envelope tracking scheme. A trough-filling section (94) is responsive to an envelope tracking signal (86), which in turn is responsive to a magnitude signal (90) extracted from a complex baseband communication signal (76). The trough-filing section (94) includes a limiting stage (108) that forms a raw troughing signal (110) which expands the bandwidth of the envelope tracking signal (86). A filtering stage (116) reduces the bandwidth of the raw troughing signal (110) to form a trough-filling signal (122) that is combined back into the envelope tracking signal (86) using a linear process that maintains the bandwidth of the envelope tracking signal (86).

Abstract: A wireless communication device includes a central processing unit (CPU), a sensor electrically connected to the CPU, an antenna module, and a matching circuit electrically connected between the CPU and the antenna module. In response to a call being made by the wireless communication device and in response to detection of an external object within a predetermined range of the wireless communication device by the sensor, the sensor transmits a signal to trigger the CPU to generate a control signal. The matching circuit receives the signal from the CPU and shifts the resonant frequency of the antenna module down.

Abstract: Embodiments of the present disclosure disclose a method and an apparatus for determining a precoding matrix, which relate to the field of communications technologies and may improve throughput of a MIMO system and optimize overall system performance, including: determining a rank constraint of a jth transmitting end, where j=1, 2, . . . , K, and K is the total number of transmitting ends in a MIMO system; iteratively calculating an optimal precoding matrix of the jth transmitting end according to a channel matrix from the jth transmitting end to a jth receiving end, an autocorrelation matrix of interference and noise of the jth receiving end, and the rank constraint of the jth transmitting end, where the optimal precoding matrix maximizes channel capacity of a link from the jth transmitting end to the jth receiving end under a circumstance that precoding matrices of other transmitting ends do not change.

Abstract: A communication device is described comprising a first antenna, a second antenna and a third antenna; a first transceiver configured to communicate using at least the first antenna; a second transceiver configured to communicate using at least the second antenna; and a controller configured to determine whether the third antenna is to be used by the first transceiver or the second transceiver based on a selection criterion and configured to control the first transceiver to communicate using the first antenna and the third antenna if the controller has determined that the third antenna is to be used by the first transceiver and to control the second transceiver to communicate using the second antenna and the third antenna if the controller has determined that the third antenna is to be used by the second transceiver.

Abstract: Various embodiments are disclosed relating to techniques to provide neighbor information in wireless networks and/or techniques to provide measurement pilot transmission information in wireless networks. According to an example embodiment, a neighbor report may be received from a first wireless node, the neighbor report including at least measurement pilot transmission information for one or more other wireless nodes. According to an example embodiment, a signal measurement technique for measuring signals from at least one of the one or more other wireless nodes may be determined based, at least in part, upon the neighbor report. According to another example embodiment, a message may be received from a first wireless node, the message including measurement pilot transmission information for the first wireless node. A signal measurement technique for measuring signals from the first wireless node may be determined based, at least in part, upon the received message.

Abstract: A system, method, and computer program product for wireless network monitoring. Some particular features of various embodiments include notification via mobile phones (or other wireless devices) of outages in the wireless environment, an automated incident log, a web page to enter the resolution of an outage, a contact list containing personnel who could potential be contacted during an outage, and pop up messages that occur when an outage is detected.

Abstract: The present disclosure relates to an apparatus and a method for transmitting muting information in a wireless communication system, and to an apparatus and a method for acquiring channel state using same. In an exemplary embodiment, muting information includes: a first data field, having a serving cell for receiving from peripheral cells in a multi-cell environment, at least one of a CSI-RS pattern, the number of CSI-RS antenna ports, a CSI-RS duty cycle, and CSI-RS transmission subframe offset information, and using same for expressing the cycle and the offset of muting subframes, which pertain to information on a resource block that can generate interference between the peripheral cells and CSI-RS; and a second data field for expressing a specific muting pattern, which must be muted within the muting subframes, having either 12 bits or 28 bits that display muting application in a bitmap format.

Abstract: A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs).

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.