| Patent application number | Description | Published |
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| 20090245230 | COMPENSATING FOR DRIFTS OCCURRING DURING SLEEP TIMES IN ACCESS TERMINALS - A method and apparatus are presented for compensating drifts in access terminals occurring during a sleep time. The method includes determining whether a sleep time exceeds a threshold, buffering time domain samples containing acquisition pilots and a paging channel, powering down RF circuitry in the access terminal after buffering samples, processing the samples to compensate for drift, and determining whether the access terminal was paged based upon the processed samples. The apparatus includes a digital front end, an FFT engine coupled to the digital front end, a symbol buffer coupled to the FFT engine, a processor coupled to the digital front end, FFT engine, and symbol buffer, and a memory coupled to the processor, the memory further comprising instructions for executing the method. | 10-01-2009 |
| 20090245417 | TRANSMITTER CHAIN TIMING AND TRANSMIT POWER CONTROL - In a communications system, transmitter power gain can be changed between symbols. A power gain change of a first part of a transmit chain is initiated a first time, whereas a power gain change of a second part of the transmit chain is initiated at a second time, such that the resulting power gain changes of the first and second parts both occur substantially within an inter-symbol time in a desired relationship to one another. In one example, the power gain change of the first part is initiated before the beginning of the inter-symbol time to account for expected serial bus latency between initiation and execution of the power gain change of the first part. The power gain change of the second part is initiated during the inter-symbol time such that overall power does not exceed an amount (for example, a maximum permitted under a communication standard). | 10-01-2009 |
| 20100067421 | APPARATUS AND METHODS FOR CONTROLLING AN IDLE MODE IN A WIRELESS DEVICE - Apparatus and methods are disclosed for control of an idle mode in a wireless device. In particular, the idle mode duty cycle of a preamble transmission by an access point (AP), as an example, is variably or adaptively set in response to determined conditions of the wireless neighborhood. The conditions determined include the whether or not other wireless devices are present in the vicinity of sensing wireless device, as well as the state of those devices present, such as whether they are in an idle mode or an active mode. | 03-18-2010 |
| 20100067422 | APPARATUS AND METHODS FOR CONTROLLING A SLEEP MODE IN A WIRELESS DEVICE - Apparatus and methods for controlling sleep mode in a wireless device are disclosed. The sleep mode is controlled using low power detection of RF beacon signals of known frequencies to reduce power consumption of the wireless device during sleep modes. Detection is achieved by using passive or low power elements in a receive chain that filters received signals allowing beacon signals of particular frequencies to pass, which are accumulated with passive or low power circuit elements requiring no external power source. The accumulated energy is compared to a threshold to determine the presence of the beacon with sleep circuitry. When the beacon is detected, the full RF receiver is triggered to wake up. Use of low power elements and passive elements, affords a beneficial increase in power savings for the wireless device, which is particularly helpful in wireless access points or relay stations that have an alternative power sourcing such as battery or solar power. | 03-18-2010 |
| 20100184397 | METHOD AND SYSTEM FOR DC COMPENSTATION - A technique for performing AGC and DC compensation in a receiver. The receiver comprises an energy estimator for generating an estimate of the level of a received signal; an RF device to apply gain to the received signal; an AGC for controlling the RF device gain based on the energy estimation; a first DC compensation loop for finely adjusting the DC component of the received signal in fast or slow tracking mode (FTM or STM); and a second DC compensation loop for coarsely adjusting the DC component of the received signal. Three modes of AGC operations: In Acquisition, iterations of FTM fine DC adjustment, short energy estimation, and RF device gain adjustment are performed during signal timing detection. In Connected, long energy estimation, RF device gain adjustment, and STM fine and coarse DC adjustments are performed during superframe preamble. In Sleep, FTM fine DC adjustment, short energy estimation, and RF device gain adjustment are performed during superframe preamble. | 07-22-2010 |
| 20100329162 | METHOD AND APPARATUS FOR RADIO FILTERING IN A MULTI-RADIO DEVICE - Systems and methodologies are described herein that facilitate filtering or clustering of radios and/or other transceivers associated with a communication environment. As described herein, potentially conflicting transceivers supported by a communications device can be managed in an expedited fashion by filtering the transceivers into respective groups or clusters of transceivers that exhibit potential collisions. For example, clusters can be generated such that respective transceivers are associated with a single cluster and respective transceivers associated with a given cluster do not exhibit potential collisions with transceivers not associated with the given cluster. Clustering can be performed graphically as further described herein by generating and analyzing a graph that includes nodes corresponding to respective transceivers and edges representing potential conflicts therebetween. Additionally, resolution tables can be generated using substantially all combinations of conflicting transceivers within a set of transceivers, as determined based on an initial clustering and/or in any other suitable manner. | 12-30-2010 |
| 20100330977 | CENTRALIZED COEXISTENCE MANAGER FOR CONTROLLING OPERATION OF MULTIPLE RADIOS - Systems and methodologies are described herein that facilitate a centralized structure for managing multi-radio coexistence for a mobile device and/or other suitable device(s). As described herein, a control plane coexistence manager (CxM) entity and/or a data plane CxM entity can be implemented to directly interact with a set of associated transceivers (e.g., radios, etc.) in order to manage conflicts between events corresponding to the transceivers. Further, CxM operation can be divided between the control and data planes such that the control plane handles configuration and long-term operations such as radio registration, sleep mode management, long-term event resolution, interaction with upper layers, etc., while the data plane handles short-term operations with respect to radio event management based on incoming notifications or event requests. For instance, the data plane can evaluate a set of requested events, select event(s) to be executed, and provide responses to the associated transceivers relating to the selection(s). | 12-30-2010 |
| 20100331029 | DECENTRALIZED COEXISTENCE MANAGER FOR CONTROLLING OPERATION OF MULTIPLE RADIOS - Systems and methodologies are described herein that facilitate a decentralized structure for managing multi-radio coexistence for a mobile device and/or other suitable device(s). As described herein, a coexistence manager (CxM) and/or other suitable means can be implemented in connection with a set of radios (or other transceivers) in order to manage conflicts between events corresponding to the radios. Functionality can be divided such that the CxM operates on the control plane and handles configuration and long-term operations such as registration, sleep mode management, interaction with upper layers, etc., while the respective radios operate on the data plane and handle short-term radio event management operations based on incoming notifications or event requests. For instance, radios can identify conflicts between requested external events and internally associated events and accordingly provide responses that allow or disallow the external events on an absolute basis or a conditional basis (e.g., based on proposed event modifications). | 12-30-2010 |
| 20110007680 | SLEEP MODE DESIGN FOR COEXISTENCE MANAGER - Systems and methodologies are described herein that facilitate implementation and use of a sleep mode for a multi-radio coexistence manager. As described herein, respective radios coordinated by a coexistence manager (CxM) can be grouped into radio or sleep clusters, for which the CxM can enter a low-power mode (e.g., a sleep mode) based on respective operating states of radios in the clusters. As further described herein, a CxM can provide an acquisition sequence and/or other suitable means to enable respective radios to synchronize with the CxM. In addition, techniques are provided herein by which a CxM can indicate its present operating mode (e.g., active, wakeable sleep, non-wakeable sleep, or disabled) to respective radios, and by which a radio can wake the CxM from a sleep operating mode under predetermined circumstances. | 01-13-2011 |
| 20110007688 | METHOD AND APPARATUS FOR EVENT PRIORITIZATION AND ARBITRATION IN A MULTI-RADIO DEVICE - Systems and methodologies are described herein that facilitate prioritization and arbitration of radio events associated with a set of potentially conflicting radios supported by a wireless device. As described herein, bin-based priority can be implemented for respective radio events such that events are assigned to bins of varying priority levels based on factors such as functional correlations of respective events to data loss, event deadlines, or relative radio priorities. Subsequently, selection of an event combination can be performed based on bins to which respective events are assigned. Techniques are additionally described herein for arbitrating among conflicting radio events assigned to the same bin using random selection, history-based arbitration, or the like. As further described herein, arbitration can be adjusted to favor selection of new, ongoing, or previously events. Further, arbitration as described herein can be adjusted to accommodate events that execute in a plurality of decision units in time. | 01-13-2011 |
| 20110007696 | METHOD AND APPARATUS FOR OIS PROTECTION IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate improved multi-radio coexistence between a Forward Link Only (FLO) radio and at least one non-FLO radio associated with a wireless device. As described herein, Overhead Information Symbol (OIS) transmissions scheduled by a FLO radio (such as transmissions on a dedicated OIS control channel or data transmissions containing embedded OIS information) can be given higher priority than other transmissions that collide with the OIS transmissions. In addition, transmissions scheduled by a non-FLO radio can be prioritized above respective non-OIS transmissions scheduled by a FLO radio, or alternatively non-OIS FLO transmissions can additionally be prioritized above transmissions scheduled by a non-FLO radio according to a measured amount of degradation present at the non-FLO radio. In a specific example described herein involving a Long Term Evolution (LTE) radio, degradation can be determined based on a number of successively missed Physical Uplink Control Channel (PUCCH) transmissions. | 01-13-2011 |
| 20110009136 | RESOLUTION ALGORITHMS FOR MULTI-RADIO COEXISTENCE - Systems and methodologies are described herein that facilitate resolution between respective radios associated with a multi-radio wireless device. As described herein, various techniques can be utilized with a multi-radio coexistence manager and/or other suitable mechanisms associated with a wireless device to perform joint resolution for multiple associated radios, thereby providing performance enhancements over conventional piecewise radio resolution schemes. Various exhaustive, decoupled, and progressive radio resolution algorithms are provided herein, by which respective sets of parameters (e.g., transmit powers, interference targets, frequency sub-bands, radio frequency knob settings, etc.) can be selected for respective potentially conflicting radios to enable such radios to operate in coexistence. Further, techniques are provided herein for utilizing a graph theoretic algorithm for progressive radio resolution. In addition, a generic power resolution algorithm can be modified to provide support for multi-transmitter interference mechanisms by employing modifications such as joint power resolution and/or one-pass or iterative interference partitioning. | 01-13-2011 |
