Patent application number | Description | Published |
20130279355 | MULTI-RADIO COEXISTENCE - A method for wireless communications includes determining a time division duplex (TDD) configuration of a non-serving network. The method also includes detecting interference from the non-serving network based at least in part on the TDD configuration of the non-serving network. The method further includes signaling an eNodeB of the interference based at least in part on the detecting. | 10-24-2013 |
20140036805 | MANAGEMENT OF UNCOORDINATED INTERFERENCE - An interference management scheme may detect a level of uncoordinated interference and compare a detected uncoordinated interference level against an intra-RAT (radio access technology) interference. Intra-RAT interference management algorithms or intra-RAT interference solutions are not triggered/applied if the uncoordinated interference is dominant. Alternatively, intra-RAT interference management algorithms may be triggered if co-channel intra-RAT interference is dominant. | 02-06-2014 |
20140071894 | VARIABLE BLOCK LENGTH AND SUPERPOSITION CODING FOR HYBRID AUTOMATIC REPEAT REQUEST - An eNB may retransmit packets according to a hybrid automatic repeat request using superposition coding. In one instance, the eNB receives a negative-acknowledgement of an initially transmitted packet and retransmits at least one packet according to hybrid automatic repeat request using superposition coding in response to the negative-acknowledgement. The eNB also retransmits packets according to variable block length retransmission. In this instance, the eNB receives a negative-acknowledgement of an initially transmitted fixed block length packet and retransmits a variable block length packet in response to the negative-acknowledgement | 03-13-2014 |
20140219117 | APPARATUS AND METHOD FOR INTER CELL INTERFERENCE COORDINATION - The present disclosure presents a method and an apparatus of triggering an inter cell interference coordination (ICIC) mechanism in a wireless network. For example, the disclosure presents a method for identifying a pilot pollution metric and determining when a pilot pollution condition based at least on the pilot pollution metric is satisfied. In addition, such as an example method may include triggering an ICIC mechanism when the pilot pollution condition is satisfied. As such, triggering an ICIC mechanism in a wireless network may be achieved. | 08-07-2014 |
20140269367 | METHOD AND APPARATUS FOR MITIGATING THE IMPACT OF SHORT INTERFERENCE BURSTS - Techniques are provided for utilizing selected inter-frame spacing, such as reduced inter-frame spacing (RIFS) or short inter-frame spacing (SIFS) to avoid failed data transmissions in a Wi-Fi network or the like. For example, there is provided a method, operable by a transmitter node or entity, such as, for example, an access point (AP), that may involve sending a data transmission in a data aggregation mode, the data transmission comprising aggregated MAC protocol data units (A-MPDUs). The method may involve monitoring for and detecting potential short interference bursts in the network. The method may involve re-sending the data transmission in a data bursting mode, the data transmission comprising back-to-back data packet bursts separated by a selected inter-frame spacing. | 09-18-2014 |
20140269623 | METHOD AND APPARATUS FOR PDCCH POWER AND RATE CONTROL FOR DENSE SMALL CELLS - System, apparatus, and methods are provided for improving channel quality and handover performance in a wireless communication network. A network entity may determine a resource element quantity for use by a control channel and may determine a power level for a resource element for use by the control channel. The network entity may assign the determined resource element quantity to the control channel and may implement the determined power level for the resource element. The network entity may determine a channel quality of the control channel and may determine a presence of an access terminal in a handover region. The determined resource element quantity may be based on the channel quality. The determined power level may be based on the channel quality. | 09-18-2014 |
20150063098 | REDUCING INTERFERENCE FROM LTE IN UNLICENSED BANDS - The disclosure relates to reducing Wi-Fi interference from small cells that provide cellular coverage in unlicensed bands. In particular, in response to determining that a small cell is substantially unloaded (e.g., has traffic below a threshold), the small cell may be switched to a reduced interference configuration. For example, the small cell may be switched to a low downlink configuration to reduce interference in a time domain and/or a low bandwidth configuration to reduce interference in a frequency domain. Alternatively (or additionally), the small cell and/or any other small cells that have traffic below the threshold may switch to the same frequency and/or channel number to concentrate all possible interference on the same frequency and/or channel number. Further still, the configuration may be switched in a power domain, where a transmit power associated with the small cell may be adapted based on cellular measurements in combination with Wi-Fi measurements. | 03-05-2015 |
20150063099 | ROBUST INTER-RADIO ACCESS TECHNOLOGY OPERATIONS IN UNLICENSED SPECTRUM - Systems and methods are disclosed for mitigating interference between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies. The mitigation may comprise, for example, identifying an upcoming signal transmission associated with a first RAT, with the signal transmission being scheduled for transmission on the shared operating spectrum during a transmission period. The signal transmission may be classified with respect to a protection status. Based on the protection status, a channel reservation message may be transmitted that is associated with a second RAT to reserve at least a portion of the shared operating spectrum for at least a portion of the transmission period. | 03-05-2015 |
20150063146 | RADAR DETECTION IN WIRELESS NETWORK THAT USES FREQUENCY-DIVISION DUPLEXING - An apparatus, configured to communicate with an access terminal in a wireless network and operating in a frequency-division duplexing mode, can be caused to refrain from transmitting during at least one subframe of a frame of a downlink frequency band, and can be caused to monitor for the radar transmission during the at least one subframe of the frame of the downlink frequency band. Optionally, a placement of the at least one subframe within the frame of the downlink frequency band can correspond to a placement of at least one subframe that is designated for an uplink communication within a frame of a wireless network that is operating in accordance with the Long-Term Evolution Time-Division Duplex standard, or can correspond to a placement of at least one subframe that is designated for a transmission in accordance with the Multimedia Broadcast Multicast Service specification. | 03-05-2015 |
20150063147 | MANAGING RADAR DETECTION IN WIRELESS NETWORK THAT USES FREQUENCY-DIVISION DUPLEXING - An apparatus, configured to communicate with other apparatuses in a wireless network and operating in a frequency-division duplexing mode, can be caused to refrain from transmitting during a number of subframes of a frame of a downlink frequency band prior to a detection of a radar transmission, can be caused to send a first signal, related to monitoring for the radar transmission, to a second apparatus, and can be caused to change the number of the subframes of the frame of the downlink frequency band in response to an event that can be an increase or a decrease in a load of the apparatus or the detection of the radar transmission. Optionally, placement of the subframes within the frame of the downlink frequency band can correspond to placement of subframes that are designated for an uplink communication within a frame configured in accordance with the Long-Term Evolution Time-Division Duplex standard. | 03-05-2015 |
20150063148 | ROBUST INTER-RADIO ACCESS TECHNOLOGY OPERATIONS IN UNLICENSED SPECTRUM - Systems and methods for co-existence in unlicensed spectrum are disclosed. In one aspect, mitigating interference between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies may comprise, for example, determining an inter-RAT interference metric associated with base station narrowband signaling on the unlicensed band and modifying a transmission parameter relating to a transmission power or signaling scheme for narrowband signaling based on the determined inter-RAT interference metric. In accordance with the modified transmission parameter, a narrowband signal may be transmitted on the unlicensed band. | 03-05-2015 |
20150063150 | MEASUREMENT REPORTING IN UNLICENSED SPECTRUM - Systems and methods for measurement reporting in unlicensed spectrum are disclosed. A user device may perform one or more signaling measurements in an unlicensed frequency band in accordance with a first Radio Access Technology (RAT) and send feedback information relating to the signaling measurements to a small cell base station, with the feedback information being sent in accordance with a second RAT. A message may be sent to the user device in accordance with the second RAT that configures the user device to perform the one or more signaling measurements in the unlicensed frequency band. | 03-05-2015 |
20150063151 | OPPORTUNISTIC SUPPLEMENTAL DOWNLINK IN UNLICENSED SPECTRUM - Systems and methods for managing communication in an unlicensed band of frequencies to supplement communication in a licensed band of frequencies in unlicensed spectrum are disclosed. The management may comprise, for example, monitoring utilization of resources currently available to a first Radio Access Technology (RAT) via at least one of a Primary Cell (PCell) operating in the licensed band, a set of one or more Secondary Cells (SCells) operating in the unlicensed band, or a combination thereof. Based on the utilization, a first SCell among the set of SCells may be configured or de-configured with respect to operation in the unlicensed band. | 03-05-2015 |
20150063321 | RADAR DETECTION - Systems and methods for radar detection in a communication environment are disclosed. The radar detection may comprise, for example: receiving a first signal; identifying the first signal as a potential radar signal; limiting transmission by an apparatus as a result of the identification; receiving a second signal while the transmission by the apparatus is limited; and determining whether at least one of the first signal, the second signal, or a combination thereof is a radar signal. | 03-05-2015 |
20150063323 | CHANNEL SELECTION TO REDUCE INTERFERENCE TO A WIRELESS LOCAL AREA NETWORK FROM A CELLULAR NETWORK - The disclosure is related to selecting an operating channel for a cellular network to reduce interference to a wireless local area network (WLAN) operated by a small cell comprising a WLAN access point and a cellular network modem. The small cell performs a channel scan of available channels, determines whether or not there is a clean channel to be the operating channel for the cellular network based on the channel scan, wherein a clean channel comprises a channel that interferes with the WLAN less than a WLAN interference threshold, and selects the clean channel as the operating channel for the cellular network based on the clean channel being available or turns off the cellular network based on no clean channel being available. | 03-05-2015 |
20150065144 | METHODS AND APPARATUS FOR PARAMETER SELECTION AND CONFLICT RESOLUTION FOR MULTIPLE RADIO ACCESS TECHNOLOGIES - Methods and apparatus for communication comprise selecting a first parameter value for a first RAT transmission-related parameter from a first set of selectable first parameter values and a second parameter value for a second RAT transmission-related parameter from a second set of selectable second parameter values based at least in part on a mapping function that maps between ones of the first set of selectable first parameter values for the first RAT transmission-related parameter and the second set of selectable second parameter values for the second RAT transmission-related parameter. Moreover, the methods and apparatus comprise communicating using at least one of the first parameter value of the first RAT transmission-related parameter for the first RAT and the second parameter value of the second RAT transmission-related parameter for the second RAT. | 03-05-2015 |
20150065152 | OPPORTUNISTIC CARRIER AGGREGATION FRAMEWORK FOR EFFICIENT LTE OPERATION IN UNLICENSED SPECTRUM - Described herein are techniques for reducing efficient LTE operation in the unlicensed band. For example, the technique may involve establishing a connection with a primary component carrier on the licensed communication band or the unlicensed communication band. The technique may also involve determining at least one metric associated with a constraint on a transmissions channel of the unlicensed communication band. The technique may also involve sending the at least one metric to the primary component carrier. The technique may also involve receiving a message for one of switching on or switching off a secondary component carrier (SCC) for transmissions on the unlicensed communication band in response to sending the at least one metric. | 03-05-2015 |
20150080003 | MOBILITY-BASED FRACTIONAL FREQUENCY REUSE - Fractional frequency reuse (FFR) is defined based on a mobility condition of an access terminal. For example, upon determining that an access terminal is moving (or at a cell edge, or experiencing poor link conditions, etc., due to mobility), FFR may be defined for the serving access point of the access terminal and/or for neighbor access points to maintain acceptable link quality for the access terminal. In particular, FFR may be defined in a manner that frees-up or otherwise reserves resources for the access terminal. For example, the serving access point may allocate additional sub-bands for the access terminal and/or increase the power levels used on the sub-bands allocated for the access terminal. In addition, neighbor access points may back-off these sub-bands. | 03-19-2015 |
20150085683 | TECHNIQUES FOR PERFORMING CARRIER SENSE ADAPTIVE TRANSMISSION IN UNLICENSED SPECTRUM - Aspects for reducing interference between networks are provided. A signal transmitted by a first network over a communications medium using an unlicensed frequency spectrum is decoded to determine one or more parameters of a packet in the signal. A level of utilization of the communications medium by the first network can be estimated based at least in part on a signal strength of the signal and the one or more parameters. A time for communicating in a second network over the communications medium using the unlicensed frequency spectrum can be adjusted based at least in part on the level of utilization of the communications medium by the first network. | 03-26-2015 |
20150085684 | CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) IN UNLICENSED SPECTRUM - Systems and methods for Carrier Sense Adaptive Transmission (CSAT) and related operations in unlicensed spectrum are disclosed to reduce interference between co-existing Radio Access Technologies (RATs). The parameters for a given CSAT communication scheme may be adapted dynamically based on received signals from a transceiver for a native RAT to be protected and an identification of how that RAT is utilizing a shared resource such as an unlicensed band. Other operations such as Discontinuous Reception (DRX) may be aligned with a CSAT Time Division Multiplexed (TDM) communication pattern by way of a DRX broadcast/multicast message. Different TDM communication patterns may be staggered in time across different frequencies. Channel selection for a co-existing RAT may also be configured to afford further protection to native RATs by preferring operation on secondary channels as opposed to primary channels. | 03-26-2015 |
20150085792 | PERFORMANCE OF A USER EQUIPMENT (UE) IN UNLICENSED SPECTRUM - The present disclosure presents a method and an apparatus for improving performance of a user equipment (UE) operating in unlicensed spectrum. For example, the disclosure presents a method for receiving, at the UE, a secondary component carrier (SCC) update from a small cell. The example method further includes tuning the UE to a second SCC in response to receiving the update. The update is received at the UE when the small cell operating on a first radio access technology (RAT) determines that a channel associated with a first SCC of the small cell is also in use by another entity operating on a second RAT. As such, improved performance of a user equipment (UE) operating in an unlicensed spectrum may be achieved. | 03-26-2015 |
20150085841 | CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) IN UNLICENSED SPECTRUM - Systems and methods for Carrier Sense Adaptive Transmission (CSAT) and related operations in unlicensed spectrum are disclosed to reduce interference between co-existing Radio Access Technologies (RATs). The parameters for a given CSAT communication scheme may be adapted dynamically based on received signals from a transceiver for a native RAT to be protected and an identification of how that RAT is utilizing a shared resource such as an unlicensed band. Other operations such as Discontinuous Reception (DRX) may be aligned with a CSAT Time Division Multiplexed (TDM) communication pattern by way of a DRX broadcast/multicast message. Different TDM communication patterns may be staggered in time across different frequencies. Channel selection for a co-existing RAT may also be configured to afford further protection to native RATs by preferring operation on secondary channels as opposed to primary channels. | 03-26-2015 |