Patent application number | Description | Published |
20100304745 | REDUCING FREQUENT HANDOFFS OF A WIRELESS COMMUNICATION DEVICE - A method for reducing frequent idle handoffs of a wireless communication device is described. A registration request is received by a base station or a femto access point from the wireless communication device. The number of registration requests received from the wireless communication device are counted while the registration timer is running. It is determined that frequent handoffs are happening when the number of registration requests received is greater than a registration threshold. A transmit power of a femto access point is adjusted if the number of registration requests received indicates that frequent handoffs are happening. | 12-02-2010 |
20100315967 | MULTI-FREQUENCY PILOT SIGNALS - An access point is identified based on pilot signal information that appears on different frequencies. Here, a combination of one or more pilot PN spreading codes or one or more PN offsets on different frequencies are used to uniquely identify an access point. For example, upon receipt of a pilot measurement report, a network entity may uniquely identify an access point that transmitted the pilot signals based on at least one pilot PN spreading code or at least one PN offset and a plurality of frequencies identified by the report. Also, to facilitate acquiring this information, a network entity may request an access terminal to conduct an inter-frequency search for pilot signals. Also, an access terminal may maintain pilot information corresponding to access points in a network and use this information to autonomously conduct inter-frequency searches for pilot signals. | 12-16-2010 |
20110189986 | MESSAGE-BASED EXCHANGE OF ACCESS POINT PILOT SIGNATURE INDICATORS - An access point is identified based on a plurality of pilot signatures. Here, in addition to transmitting a pilot signal that is encoded (e.g., spread/scrambled) using a particular pilot signature, an access point transmits a message that includes at least one indication of at least one other pilot signature. For example, an access point may use one PN offset to generate a pilot signal and transmit a message that identifies at least one other PN offset. An access terminal that receives the pilot signal and the message may then generate a pilot report that identifies all of these pilot signatures. Upon receiving a handover message including this pilot-related information, a target network entity with knowledge of the pilot signatures assigned to that access point may then accurately identify the access point as a target for handover of the access terminal. | 08-04-2011 |
20110189995 | ACCESS POINT IDENTIFICATION BASED ON MULTIPLE PILOT SIGNATURE INDICATORS - An access point is identified based on a plurality of pilot signatures. Here, in addition to transmitting a pilot signal that is encoded (e.g., spread/scrambled) using a particular pilot signature, an access point transmits a message that includes at least one indication of at least one other pilot signature. For example, an access point may use one PN offset to generate a pilot signal and transmit a message that identifies at least one other PN offset. An access terminal that receives the pilot signal and the message may then generate a pilot report that identifies all of these pilot signatures. Upon receiving a handover message including this pilot-related information, a target network entity with knowledge of the pilot signatures assigned to that access point may then accurately identify the access point as a target for handover of the access terminal. | 08-04-2011 |
20110275361 | RESTRICTING ACCESS POINT TRANSMISSIONS - Transmissions by a first access point (e.g., a femto cell) are restricted upon detecting an access terminal in the vicinity of the first access point in the event the access terminal is communicating with a second access point (e.g., a macro cell). Upon detection of such an access terminal, the access terminal restricts transmission (e.g., beacon transmission) on a downlink carrier frequency on which the access terminal is actively receiving information from the second access point. This restriction of transmission by the access point may involve, for example, temporarily reducing transmit power, reducing the periodicity of transmission, or ceasing transmission. | 11-10-2011 |
20110281571 | IDLE ACCESS TERMINAL-ASSISTED TIME AND/OR FREQUENCY TRACKING - An access point (e.g., a femto cell) that is connected in an active call with an access terminal may cooperate with that access terminal or another access terminal to derive timing information from one or more neighboring access points (e.g., macro access points). In addition, an access point may cooperate with an idle access terminal to derive timing information from one or more neighboring access points. For example, an access terminal may determine the difference between pilot transmission timing or frame transmission timing of a femto cell and a macro cell, and report this timing difference to the femto cell. Based on this timing difference, the femto cell may adjust the timing and/or frequency of its transmissions so that these transmissions are synchronized in time and/or frequency as per network operation requirements. | 11-17-2011 |
20110281574 | ACCESS TERMINAL-ASSISTED TIME AND/OR FREQUENCY TRACKING - An access point (e.g., a femto cell) that is connected in an active call with an access terminal may cooperate with that access terminal or another access terminal to derive timing information from one or more neighboring access points (e.g., macro access points). In addition, an access point may cooperate with an idle access terminal to derive timing information from one or more neighboring access points. For example, an access terminal may determine the difference between pilot transmission timing or frame transmission timing of a femto cell and a macro cell, and report this timing difference to the femto cell. Based on this timing difference, the femto cell may adjust the timing and/or frequency of its transmissions so that these transmissions are synchronized in time and/or frequency as per network operation requirements. | 11-17-2011 |
20120039265 | CONTROLLING ACCESS POINT TRANSMIT POWER BASED ON RECEIVED ACCESS TERMINAL MESSAGES - Transmit power for an access point is controlled based on information received by the access point. For example, an access point may employ one or more algorithms that use messages received from nearby access terminals to maintain an acceptable tradeoff between providing an adequate coverage area for access point transmissions and mitigating interference that these transmissions cause at nearby access terminals. Here, the access point may employ a network listen-based algorithm upon initialization of the access terminal to provide preliminary transmit power control until sufficient information is collected for another transmit power control algorithm (e.g., an access terminal assisted algorithm). Also, the access terminal may employ an active access terminal protection scheme to mitigate interference the access point may otherwise cause to a nearby access terminal that is in active communication with another access point. | 02-16-2012 |
20120046026 | CONTROLLING ACCESS POINT TRANSMIT POWER BASED ON EVENT-TRIGGERED ACCESS TERMINAL MESSAGING - Transmit power for an access point is controlled based on measurement reports received by the access point from one or more access terminals that are not currently being served by the access point. In some aspects, transmit power is controlled based on the number of received messages that correspond to a particular event. In some aspects, transmit power is controlled based on the contents of the received messages. For example, the access point may use signal strength information included in the messages to determine a level of transmit power that mitigates interference at a defined subset of reporting access terminals. | 02-23-2012 |
20120046063 | CONTROLLING ACCESS POINT TRANSMIT POWER BASED ON ACCESS TERMINAL RANKING - Transmit power for an access point is controlled based on measurement reports received by the access point from one or more access terminals that are not currently being served by the access point. In some aspects, transmit power is controlled based on the number of received messages that correspond to a particular event. In some aspects, transmit power is controlled based on the contents of the received messages. For example, the access point may use signal strength information included in the messages to determine a level of transmit power that mitigates interference at a defined subset of reporting access terminals. | 02-23-2012 |
20120142392 | MULTI-STAGE TRANSMIT POWER CONTROL SCHEME FOR ACCESS POINT - Transmit power for an access point is controlled based on information received by the access point. For example, an access point may employ one or more algorithms that use messages received from nearby access terminals to maintain an acceptable tradeoff between providing an adequate coverage area for access point transmissions and mitigating interference that these transmissions cause at nearby access terminals. Here, the access point may employ a network listen-based algorithm upon initialization of the access terminal to provide preliminary transmit power control until sufficient information is collected for another transmit power control algorithm (e.g., an access terminal assisted algorithm). Also, the access terminal may employ an active access terminal protection scheme to mitigate interference the access point may otherwise cause to a nearby access terminal that is in active communication with another access point. | 06-07-2012 |
20120252453 | POWER CONTROL FOR A NETWORK OF ACCESS POINTS - A power calibration scheme adjusts power levels of network of femtocells based on macro signals seen at different points in and around a coverage area and based on the mutual positions of the femtocells (e.g., based on femtocell signals seen at these points). The power calibration scheme thus facilitates a good balance between providing a desired level of coverage and mitigation of interference to nearby macrocells and femtocells. | 10-04-2012 |
20120252521 | ACCESS POINT TRANSMIT POWER CONTROL - A power calibration scheme adjusts power levels of network of femtocells based on macro signals seen at different points in and around a coverage area and based on the mutual positions of the femtocells (e.g., based on femtocell signals seen at these points). The power calibration scheme thus facilitates a good balance between providing a desired level of coverage and mitigation of interference to nearby macrocells and femtocells. | 10-04-2012 |
20120258720 | ACTIVE HAND-IN FOR MULTI-FEMTO DEPLOYMENTS - A method for enabling an active hand-in from a macro base station network to a femtocell network includes servicing an active hand-in of a mobile entity from a macro base station to a femtocell network, using a first femtocell of the femtocell network. The active hand-in includes a hard handoff of the mobile entity from the macro base station with soft handoff of the mobile entity enabled between the first femtocell and one or more neighboring femtocells in the femtocell network. The hard handoff with soft handoff enabled may be implemented using novel procedures implemented by one or more entities of a wireless communications network including the femtocells and macro base station. | 10-11-2012 |
20130028293 | TIME-SHARED AND CONCURRENT MULTI-PROTOCOL BEACON TRANSMISSION DESIGN - A base station in a cellular wireless communications system uses one or more control algorithms to control a transmission pattern of a 1xRTT or DO discovery beacon. The transmission pattern enables access terminals using any one of multiple wake-up periods and wake-up offsets to discover all macrocell frequencies in a finite amount of time. In addition, for base stations allocating a single transmit chain to both 1xRTT and DO beacons, the transmission pattern enables a definite maximum discovery time for both 1xRTT and DO beacons for all access terminals entering the base station coverage. | 01-31-2013 |
20130122917 | METHOD AND APPARATUS FOR TIME AND FREQUENCY TRACKING IN CLUSTERED FEMTOCELL DEPLOYMENTS - Methods and apparatuses are provided for synchronizing timing or frequency of a femto node in a cluster. A femto node can determine that one or more synchronization signals are associated with a master femto node in a cluster of femto nodes, where femto nodes are to synchronize timing or frequency to the master femto node. The femto node can obtain timing or frequency information from the one or more synchronization signals and synchronize a local timing or a local frequency based at least in part on the timing or frequency information. | 05-16-2013 |
20130235746 | METHOD AND SYSTEM FOR FEMTOCELL CHANNEL SELECTION - Femto node radio frequency channel selection may be achieved by selecting between a first band of operating channels and a second band of operating channels for a femto node based on at least one band-selection criterion, the first band including a plurality of channels that are higher in frequency than a plurality of channels in the second band, and configuring the femto node for operation according to one or more operating channels in the selected band. | 09-12-2013 |
20130235759 | METHODS AND APPARATUS FOR ADAPTING FEMTOCELL PROPERTIES BASED ON CHANGES DETECTED IN NETWORK TOPOLOGY - Methods and apparatus are provided for adapting femtocell properties based on changes detected in network topology. A method includes detecting a network topology change associated with a network node. The method includes determining an availability factor of the network node based on the topology change. The method includes setting mobility parameters of at least one mobile entity serviced by the network entity and mitigating interference with at least one neighboring network node based at least in part on the network topology and on at least one adjusted resource parameter of the network entity. | 09-12-2013 |
20130235761 | METHODS AND APPARATUSES FOR PAGING IN HETEROGENEOUS NETWORKS - Wireless communication in a heterogeneous network may be facilitated by establishing connections with femto nodes based on page notifications from macro nodes to user equipment (UE). A UE in idle mode may monitor paging resources provided by a macro node, discover presence of a femto node based on signals received from the femto node, and establish a communicative connection with the femto node based on a page notification received from the macro node over the paging resources. | 09-12-2013 |
20130237245 | METHOD AND SYSTEM FOR DETERMINING LOCATION OF MOBILE DEVICES IN A FEMTOCELL - Disclosed are system and method for classifying location of a mobile device in a femtocell. In an aspect, the system and method are configured to receive, by a femtocell, location measurement information and performance measurement reports from a mobile device; classify location of the mobile device as indoors or outdoors based on the received location measurement information; and adjust a coverage area, transmit power, and/or radio frequency (RF) channel/band of the femtocell based on the location classification of the mobile device and performance measurements reports. | 09-12-2013 |
20130272219 | METHODS AND APPARATUS FOR BACKHAUL SHARING BY FEMTOCELLS - Methods and apparatus are disclosed for femtocell backhaul sharing. The method includes determining whether an available bandwidth for communication by the network entity is below a bandwidth threshold. The method includes requesting additional bandwidth from at least one neighbor network node in response to determining that the available bandwidth is below the bandwidth threshold. The method includes receiving configuration information from the at least one neighbor network node to increase the available bandwidth by at least a portion of the requested additional bandwidth. | 10-17-2013 |
20130294264 | METHOD AND APPARATUS FOR CLASSIFYING FEMTO NODE USERS - A method, an apparatus, and a computer program product for wireless communication are provided in connection with classifying devices that communicate with a femto node for providing services thereto. In one example, a node is equipped to monitor and/or receive one or more parameters communicated by a device, assign a classification to the device related to a frequency of using the femto node based in part on the one or more parameters. In an aspect, the node is equipped to provide services to the device based on the classification. In another aspect, the node is equipped to provide the classification to one or more femto nodes, including the femto node, for providing services to the device. | 11-07-2013 |
20130294405 | APPARATUS AND METHOD FOR A CONNECTED MODE WITH REDUCED SIGNALING - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus preserves a state of a UE in an anchor eNB, wherein the anchor eNB is one of a set of connected cells, the UE being in a connected mode. Each cell of the connected set has a corresponding coverage area. The apparatus then maintains the state of the UE in the anchor eNB when the UE moves from a coverage area of the anchor eNB to a coverage area of another one of the cells from the set of connected cells. | 11-07-2013 |
20140071941 | METHODS AND APPARATUS FOR PCI SELECTION TO REDUCE INTERFERENCE FROM UNLOADED CELLS - A method, an apparatus, and a computer program product for wireless communication are provided in connection with improving PCI selection and/or allocation so as to reduce interference from unloaded cells. In one example, a network entity is equipped to determine whether a cell is loaded or unloaded, and allocate a PCI from a common pool of PCIs to the cell when the cell is unloaded. In another example, a network entity is equipped to determine that a cell is to transition between an unloaded state and a loaded state, and use a first PCI from a common PCI pool associated with the cell in the unloaded state and a second PCI associated with the cell in the loaded state. In another example, a communications device is equipped to attempt to access a first cell associated with a first PCI which indicated that the first cell is unloaded. | 03-13-2014 |
20140135004 | MULTI-STAGE TRANSMIT POWER CONTROL SCHEME FOR ACCESS POINT - Transmit power for an access point is controlled based on information received by the access point. For example, an access point may employ one or more algorithms that use messages received from nearby access terminals to maintain an acceptable tradeoff between providing an adequate coverage area for access point transmissions and mitigating interference that these transmissions cause at nearby access terminals. Here, the access point may employ a network listen-based algorithm upon initialization of the access terminal to provide preliminary transmit power control until sufficient information is collected for another transmit power control algorithm (e.g., an access terminal assisted algorithm). Also, the access terminal may employ an active access terminal protection scheme to mitigate interference the access point may otherwise cause to a nearby access terminal that is in active communication with another access point. | 05-15-2014 |
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 |
20140219243 | APPARATUS AND METHODS OF JOINT TRANSMIT POWER AND RESOURCE MANAGEMENT - The present disclosure presents a method and apparatus for joint power and resource management in a wireless network. For example, the disclosure presents a method for receiving reference signal received power (RSRP) measurements of one or more neighboring base stations of a base station. In addition, such an example method, may include calibrating a transmit power of the base station based at least on the received measurements, and adjusting transmit resources of the base station in response to the calibration. As such, joint power and resource management in a wireless network may be achieved. | 08-07-2014 |
20140219244 | RESOURCE RESERVATION FOR HANDOVER SIGNALING - Resources are reserved for handover signaling. Handover reliability is thereby improved since the primary interference for handover signaling will be from the handover signaling of nearby cells (e.g., as opposed to data traffic). Given the relatively sparse nature of handover signaling, a significant reduction in interference may be achieved in a network employing this technique in comparison to conventional networks. In some implementations, a set of neighboring access points cooperate to determine which resources are reserved for handover signaling. In some implementations, resources for handover signaling are reserved on a network-wide basis or an access point cluster-wide basis. | 08-07-2014 |
20140256340 | TRANSMIT POWER CALIBRATION FOR MATCHING THE COVERAGE OF DIFFERENT RADIO TECHNOLOGIES ON A COMMON RADIO NODE - A method for wireless communication may comprise, for example, automatically determining first power settings for a first radio access technology (RAT) based on second power settings for a second RAT, and automatically applying the first power settings as power settings for the first RAT. | 09-11-2014 |
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 |
20140274049 | METHOD AND APPARATUS FOR UE MEASUREMENT ASSISTED HANDOVER CLASSIFICATION - A method, an apparatus, and a computer program product for wireless communication are provided in connection with making UE handover decisions. In one example, a node is equipped to obtain one or more UE measurement values associated with a UE, determine a mobility state of the UE based at least in part on the obtained one or more UE measurement values, and adjust one or more handover parameters based at least in part on the determined mobility state of the UE. In another example, a UE is equipped to obtain one or more UE measurements, determine a handover state of a UE based on the obtained one or more UE measurements, and perform a handover-related action based on the determined handover state of the UE. | 09-18-2014 |
20140334424 | METHODS AND APPARATUS FOR POWER MANAGEMENT IN A WIRELESS COMMUNICATION SYSTEM - Methods and apparatus for communication comprise aspects that include performing a power management procedure for configuring a subset of network entities to receive one or more of downlink signal measurements and/or one or more uplink signal measurements. The methods and apparatus further comprise aspects that include storing the one or more one or more of downlink signal measurements and/or one or more uplink signal measurements associated with the subset of network entities at a database for managing transmit power at the subset of network entities. Moreover, the methods and apparatus comprise aspects that include adjusting a transmit power value of at least one of the subset of network entities from a first transmit power value to a second transmit power value based at least in part on the one or more of downlink signal measurements and/or one or more uplink signal measurements. | 11-13-2014 |
20140362789 | TIME-SHARED AND CONCURRENT MULTI-PROTOCOL BEACON TRANSMISSION DESIGN - A base station in a cellular wireless communications system uses one or more control algorithms to control a transmission pattern of a 1xRTT or DO discovery beacon. The transmission pattern enables access terminals using any one of multiple wake-up periods and wake-up offsets to discover all macrocell frequencies in a finite amount of time. In addition, for base stations allocating a single transmit chain to both 1xRTT and DO beacons, the transmission pattern enables a definite maximum discovery time for both 1xRTT and DO beacons for all access terminals entering the base station coverage. | 12-11-2014 |
20140369336 | APPARATUS AND METHOD FOR DISTRIBUTED UPDATING OF A SELF ORGANIZING NETWORK - The present disclosure presents a method and an apparatus for distributed updating of a self organizing network. For example, the disclosure presents a method for transmitting, via a transmitting component at a base station, a portion of data collected at the base station to a network entity, wherein the data collected at the base station is received by the base station from one or more user equipments (UE) in communication with one or more base stations, wherein the base station is one of the one or more base stations, receiving feedback, from the network entity, associated with one or more network parameters of the base station, wherein the feedback received from the network entity is determined at the network entity at least based on the portion of data transmitted from the one or more base stations to the network entity, and updating the one or more network parameters at the base station based on the feedback received from the network entity and local information at the base station. As such, distributed updating of a self organizing network may be achieved. | 12-18-2014 |
20150017991 | ACCESS POINT IDENTIFICATION BASED ON MULTIPLE PILOT SIGNATURE INDICATORS - An access point is identified based on a plurality of pilot signatures. Here, in addition to transmitting a pilot signal that is encoded (e.g., spread/scrambled) using a particular pilot signature, an access point transmits a message that includes at least one indication of at least one other pilot signature. For example, an access point may use one PN offset to generate a pilot signal and transmit a message that identifies at least one other PN offset. An access terminal that receives the pilot signal and the message may then generate a pilot report that identifies all of these pilot signatures. Upon receiving a handover message including this pilot-related information, a target network entity with knowledge of the pilot signatures assigned to that access point may then accurately identify the access point as a target for handover of the access terminal. | 01-15-2015 |
20150031370 | ACTIVE HAND-IN FOR MULTI-FEMTO DEPLOYMENTS - A method for enabling an active hand-in from a macro base station network to a femtocell network includes servicing an active hand-in of a mobile entity from a macro base station to a femtocell network, using a first femtocell of the femtocell network. The active hand-in includes a hard handoff of the mobile entity from the macro base station with soft handoff of the mobile entity enabled between the first femtocell and one or more neighboring femtocells in the femtocell network. The hard handoff with soft handoff enabled may be implemented using novel procedures implemented by one or more entities of a wireless communications network including the femtocells and macro base station. | 01-29-2015 |
20150038149 | RESTRICTING ACCESS POINT TRANSMISSIONS - Transmissions by a first access point (e.g., a femto cell) are restricted upon detecting an access terminal in the vicinity of the first access point in the event the access terminal is communicating with a second access point (e.g., a macro cell). Upon detection of such an access terminal, the access terminal restricts transmission (e.g., beacon transmission) on a downlink carrier frequency on which the access terminal is actively receiving information from the second access point. This restriction of transmission by the access point may involve, for example, temporarily reducing transmit power, reducing the periodicity of transmission, or ceasing transmission. | 02-05-2015 |
20150045028 | USER EQUIPMENT SPECIFIC MOBILITY OPTIMIZATION AND IMPROVED PERFORMANCE METRICS FOR IMPROVING HANDOVER PERFORMANCE - A system for optimizing mobility robustness is operable by a network entity that detects handovers or connection failures by served access terminals. The network entity defines classifications based on mobility, route, past serving cell, or location information for the served access terminals and associates each of the handovers or connection failures with a related classification. A system for improving handover performance records a time for which an access terminal is served by the network entity before being served by a neighboring cell. A performance metric is determined based on the recorded time and a handover policy is optimized based on the performance metric. | 02-12-2015 |
20150045037 | MESSAGE-BASED EXCHANGE OF ACCESS POINT PILOT SIGNATURE INDICATORS - An access point is identified based on a plurality of pilot signatures. Here, in addition to transmitting a pilot signal that is encoded (e.g., spread/scrambled) using a particular pilot signature, an access point transmits a message that includes at least one indication of at least one other pilot signature. For example, an access point may use one PN offset to generate a pilot signal and transmit a message that identifies at least one other PN offset. An access terminal that receives the pilot signal and the message may then generate a pilot report that identifies all of these pilot signatures. Upon receiving a handover message including this pilot-related information, a target network entity with knowledge of the pilot signatures assigned to that access point may then accurately identify the access point as a target for handover of the access terminal. | 02-12-2015 |
20150085686 | SCHEDULING BASED ON SIGNAL QUALITY MEASUREMENTS - Systems and methods for resource coordination and management in a communication environment are disclosed. The resource coordination and management may comprise, for example: transmitting channel and interference measurement signals over a plurality of resources; receiving link signal quality measurements that are based on the transmission of the channel and interference measurement signals over the plurality of resources; exchanging link signal quality measurement information with at least one apparatus, wherein the exchange of the link signal quality measurement information comprises sending information based on the received link signal quality measurements; and determining a data transmission schedule based on the exchange of the link signal quality measurement information. | 03-26-2015 |