Patent application number | Description | Published |
20100234021 | Scanning Channels While a Device is Out of Service - A channel scanning order is dynamically created, modified, selectively ignored, or combinations thereof based on historical data, motion information, context information, alert message systems, network reselection, or combinations thereof. If a less preferred network has served a mobile device longer than a threshold amount of time, acquisition of the less preferred network is attempted before attempting acquisition of a more preferred network. | 09-16-2010 |
20110021197 | APPARATUS AND METHOD FOR FACILITATING TRANSFER TO A SECONDARY CELL - A method and apparatus facilitating access to a communication session for a client is provided. The method may comprise obtaining, by a wireless communications device (WCD), reverse link transmit power to a primary cell, detecting if the transmit power to the primary cell exceeds a first threshold, locating one or more secondary cells when the detected transmit power exceeds the first threshold, obtaining reverse link transmit power to the one or more located secondary cells, and initiating a session transfer to a secondary cell when the secondary cell estimated transmit power is less than the transmit power to the primary cell. | 01-27-2011 |
20110255412 | SYSTEMS, APPARATUS AND METHODS TO FACILITATE SIMULTANEOUS TRAFFIC-IDLE OR IDLE-IDLE DEMODULATION - Systems and methods for facilitating simultaneous operations are provided. The methods can include monitoring a common channel to evaluate cells or sectors in an active set, wherein monitoring is performed by a user equipment having a single receiver chain configured to receive traffic and idle information. The methods can also include demodulating channels, using the single receiver chain, including demodulating one or more emergency alerts, wherein demodulating is performed for a radio access technology and a protocol stack associated with the radio access technology. | 10-20-2011 |
20110294456 | ADAPTIVE QUALITY OF SERVICE FOR WIRELESS COMMUNICATION DEVICE - The subject matter disclosed herein relates to adaptive quality of service for a wireless communication device. | 12-01-2011 |
20130316718 | Multiple Subscription Resource Access Control - The various embodiments include methods for managing how a MSMS communication device that is accessing an arbitrary combination of multiple telephony networks processes paging collisions. The embodiment methods promote improving a subscription's page blocking rate by causing a MSMS communication device to implement a retransmission remedial action for a blocked subscription. In the various embodiments, the MSMS communication device may implement the retransmission remedial action by increasing a blocked subscription's priority during a subsequent retransmission interval to increase the likelihood that the blocked subscription will receive a repeated page message from its mobile network during this retransmission interval. In some embodiments, the blocked subscription's current priority may be based on the number of retransmission intervals that are presently occurring. | 11-28-2013 |
20140200685 | THERMAL MITIGATION IN DUAL SIM DUAL ACTIVE DEVICES - A system, a method and an apparatus are described. The apparatus includes a modem that responds to a thermal mitigation request by invoking different levels of thermal mitigation for different concurrently active connections. In some instances, the modem may invoke thermal mitigation with respect to a first active connection and refrain from invoking thermal mitigation with respect to a second active connection maintained by the modem. The apparatus determines the first and second active connections based on subscriptions corresponding to subscriber identification modules, an identification of a power amplifier or group of power amplifiers responsible for a thermal issue in the modem. The selection of mitigation levels for each active connection and decisions to invoke mitigation on one connection while refraining from invoking mitigation on another connection may be based on priorities of the active connections, including quality of service related priorities. | 07-17-2014 |
20140213210 | Method of Robust Receive (Rx) Processing for Radio Frequency Coexistence Management in Dual-SIM-Dual-Active Communication Devices - The various embodiments include a dual-SIM-dual-active (DSDA) device and methods for implementing robust receive (Rx) processing to resolve radio frequency coexistence interference between two subscriptions operating on the DSDA device. The DSDA device may detect when a subscription (the “aggressor”) de-senses the other subscription (the “victim”) as a result of the aggressor's transmissions, and in response, implement robust Rx processing to mitigate the effects of de-sense on the victim while causing minimal impact to the aggressor. | 07-31-2014 |
20140213235 | Method of Robust Transmit (Tx) Processing for Radio Frequency Coexistence Management in Dual-SIM-Dual-Active communication Devices - The various embodiments include a dual-SIM-dual-active (DSDA) device and methods for implementing robust transmit (Tx) processing to resolve radio frequency coexistence interference between two subscriptions operating on the DSDA device. The DSDA device may detect when one subscription (the “aggressor”) de-senses the other subscription (the “victim”) as a result of the aggressor's transmissions, and in response, implement robust Tx processing to mitigate the effects of de-sense on the victim. | 07-31-2014 |
20150031408 | System and Methods for Controlling Transmit Power on Multi-SIM Devices in Compliance with Specific Absorption Rate Limits - Methods and devices are disclosed for control total transmit power within specific absorption rate (SAR) limits when a multi-SIM wireless device, such as a dual-SIM dual active (DSDA) device, has two active data communications. Embodiment methods include determining a priority of at least one of two active data communications based upon a measured condition of the wireless device, and reducing transmit power on one of the two RF resources supporting one of the two active data communications with lower priority. To identify a higher or lower priority active data communication, characteristics of the communications or data may be used. | 01-29-2015 |
20150063216 | ENHANCED OUT-OF-SERVICE SCAN AND SYSTEM SELECTION FOR DUAL-SUBSCRIPTION, DUAL-ACTIVE DEVICES - A system, a method and an apparatus are described. The apparatus comprise a modem that determines frequencies at which a transceiver of a wireless device is susceptible to interference generated by a different transceiver of the wireless device, and that modifies a search for a radio access network based on the one or more frequencies. The first transceiver may be susceptible to the interference by means of transmission of the interference through one or more circuits within the wireless device. A threshold power level may be modified based on an estimate of the power of the interference. The threshold power level may be used to determine presence of a pilot signal. The interference may be modeled based on a list of frequencies associated with one or more subscriptions of the wireless device. An order of searching for pilot signals may be modified. | 03-05-2015 |
20150063431 | DIGITAL ANTENNA SWITCHING - Systems and methods for antenna switching without using a radio-frequency switch are provided. A signal received via a first antenna is digitized to form a first digital received signal. A signal received via a second antenna is digitized to form a second digital received signal. A switch selects the first digital received signal or the second digital received signal to be supplied to a modem to be demodulated. The switch may also supply a digital transmit signal from the modem to be supplied to digital-to-analog converters to and then transmitted using the first or second antenna. Additionally, when the modem is demodulating the signal received via the first antenna, another modem may be demodulating the signal received via the second antenna and vice versa. | 03-05-2015 |
20150065073 | ANTENNA SWITCHING FOR DUAL RADIO DEVICES - Systems and methods for antenna selection in a wireless terminal with two radios are provided. Signals received using first and second antennas are demodulated by first and second modems according to first and second protocols. A receive path between the second antenna and the second modem can be controlled to receive signals according to the first protocol. A performance measure of demodulating, according to the first protocol, a signal received using the second antenna is determined. The performance measure may be determined using a mirror module in the second modem or using a search module in the first modem. The wireless terminal switches antennas so that the first modem demodulates a signal received using the second antenna, if the performance measure for using the second antenna is such that the switch would improve performance of the first modem. | 03-05-2015 |
20150080008 | Predictive Control for Radio Frequency Coexistence Management in Multi-SIM-Multi-Active (MSMA) Devices - The various embodiments provide methods implemented in a MSMA communication device for managing a victim subscription's de-sense by proactively implementing an RF coexistence management strategy on the victim subscription when an RF coexistence event starts. In various embodiments, a MSMA communication device may implement an RF coexistence management strategy by determining when an aggressor subscription will de-sense a victim subscription and configuring the victim to anticipate and mitigate de-sense during the aggressor's transmissions. Thus, the various embodiments may provide dramatic improvements to the victim's overall reception performance and overall user experience. | 03-19-2015 |
Patent application number | Description | Published |
20120140644 | METHODS AND APPARATUS FOR PROVIDING ROBUST CIRCUIT SWITCH FALL BACK PROCEDURE - A method, an apparatus, and a computer program product for wireless communication are provided in which a user equipment (UE) may obtain at least one of a plurality of circuit switched fall back (CSFB) parameters from at least one of an LTE eNodeB or a usable system, wherein the plurality of CSFB parameters comprise a channel list, a system time, and a neighbor list, and may perform one or more system acquisition actions based on the at least one of the plurality of obtained CSFB parameters. | 06-07-2012 |
20120225649 | SYSTEM FOR BETTER SERVICE RESELECTION WHEN ON OTHER THAN THE MOST PREFERRED SYSTEM - System for better service reselection when on other than the Most Preferred system. In various aspects, methods and corresponding apparatus are provided for a service reselection system that operates on a device to provide better service reselection during idle mode, origination mode and active traffic mode. A method includes detecting entry into slotted mode operation on a Less Preferred system, waiting for page monitoring to complete at selected slot cycle wakeup times, performing a service reselection scan at the selected slot cycle wakeup times to find More Preferred systems, wherein the service reselection scan is performed after the page monitoring has completed, and limiting a time duration of the service reselection scan so as to avoid interference with the page monitoring to be performed at slot cycle wakeup times that follow the selected slot cycle wakeup times. | 09-06-2012 |
20120258710 | WORLD MODE SCANNING CONTROL - A method and apparatus for world-mode devices capable of managing technology selection for multimode roaming between existing access technologies, as well as possible future access technologies, in a manner that eliminates wasteful scanning for non-existent systems and reduces roaming charges is disclosed. The method allows the device an opportunity to reacquire its home system before scanning for available roaming network resources in a prioritized manner that mitigates roaming costs, while conserving power and acquisition delays by eliminating scanning for non-existent system types. A minimum OOS duration is imposed on a home system before acquisition of a roaming partner to provide more time to re-acquire the home system. Preferred partner scanning and acquisition reduces roaming charges, while scanning for non existent systems is eliminated altogether. | 10-11-2012 |
20130090117 | METHOD AND APPARATUS FOR OPTIMIZED REACQUISITION OF WIRELESS COMMUNICATIONS SYSTEMS - Motion status states reported by an advanced motion detection process or other means of obtaining a movement state of Stationary or Non-Stationary from filtered accelerometer data are utilized to reacquire service during Out of Service scenarios. Both movement states operate in three power phases: aggressive scanning or normal power mode, slow scanning or moderate power mode, and deep sleep or power saving mode. The scanning rate, power mode, scanning period and/or channel list depend upon the movement state and power phase. Motion information obtained from an advanced motion detection process provides substantial improvements in service reacquisition performance and power consumption in stationary Out of Service scenarios. When compared to traditional service reacquisition scanning routines, the reductions in average current can be achieved of: at a 5-minute OOS mark, ˜45% reduction, at a 15-minute OOS mark, ˜60% reduction and at a 6-hour OOS mark, ˜50% reduction. | 04-11-2013 |
20130090151 | METHOD AND APPARATUS FOR ADVANCED MOTION DETECTION IN WIRELESS COMMUNICATIONS SYSTEMS - Advanced Motion Detection in Wireless Communication Systems processes accelerometer or other sensor input data to distinguish between random in-place movements and actual start of motion that could produce a change in the user's location by filtering unsustained random motion. Random in-place motion such as table banging, knee jiggling, vibration, etc. are filtered out from Stationary and Non-Stationary motion state determinations. The process utilizes data from motion sensors or any accelerometer standard in all smart mobile devices and any mobile device that has automatic portrait-landscape switching (screen rotation). A state machine processes sensor or other input to produce a filtered Stationary or Non-Stationary output movement state unaffected by transient motion or rest periods. A sensor processing subsystem (SPS), or other low power processor for processing sensor or other input may be implemented to reduce power consumption and processing overhead while, for example, a modem processor or other high power processor is in a sleep mode. | 04-11-2013 |
20130100885 | SELECTIVELY INVOKING RECEIVE DIVERSITY DURING POWER-UP/INITIAL ACQUISITION AND OUT OF SERVICE MODES - Methods and apparatus for selectively invoking receive diversity during power-up/initial acquisition and out of service modes are disclosed. A method can include selectively enabling receive diversity based on an initial acquisition attempt by one of the receive chains in a wireless device having multiple receive chains. A method can also include enabling receive diversity based on a predetermined list of channels to be acquired. A predetermined list of channels is a subset of a plurality of channels that may be acquired. Other aspects, embodiments, and features are also claimed and described. | 04-25-2013 |
20130102316 | METHOD AND DEVICE FOR ANTENNA SEARCHING WITH ANTENNA SELECTION - Methods, devices, and computer program products for antenna searching with antenna selection are disclosed. In one aspect, an apparatus operable in a wireless communication system includes a first receiver, a second receiver, and a processor. The first receiver receives a first signal including pilot signals from a first antenna. The second receiver receives a second signal including pilot signals from a second antenna. The processor, while a receive diversity is enabled, demodulates the first and second signals, determines whether a first condition is satisfied, and, in response to determining that the first condition is satisfied, searches for pilot signals via the second receiver and not the first receiver. The first condition is satisfied when a signal strength of the first signal does not exceed a first threshold and a signal strength of the second signal exceeds a second threshold. | 04-25-2013 |
20130252607 | APPARATUS AND METHOD FOR DYNAMIC PILOT ACQUISITION IN A WIRELESS COMMUNICATION SYSTEM - An access terminal configured for use in a wireless communication system utilizing discontinuous reception (DRx). To reduce power consumption, a pilot acquisition timeline may be reduced when channel conditions are favorable; and to improve call quality, the pilot acquisition timeline may be increased when channel conditions are poor. Other aspects, embodiments, and features are also claimed and described. | 09-26-2013 |
20130308554 | SYSTEMS, APPARATUS, AND METHODS FOR ANTENNA SELECTION - This disclosure provides systems, methods, and apparatus for mobile transmit diversity. In one aspect, a wireless communication apparatus is provided. The wireless communication apparatus includes a plurality of antennas. The wireless communication apparatus further includes a plurality of transmit circuits, each transmit circuit of the plurality of transmit circuits being configured to transmit according to a different radio access technology. The wireless communication apparatus further includes a controller configured to selectively switch each of the transmit circuits of the plurality of transmit circuits to transmit wireless communications via a corresponding one of the plurality of antennas based on priority levels of data for each of the transmit circuits and a detected operating mode of the wireless communication apparatus. | 11-21-2013 |
20130309981 | SYSTEMS, APPARATUS, AND METHODS FOR ANTENNA SELECTION - This disclosure provides systems, methods, and apparatus for mobile transmit diversity. In one aspect, a wireless communication apparatus is provided. The wireless communication apparatus includes a transmit circuit configured to transmit wireless communications via either a first antenna or a second antenna. The wireless communication apparatus further includes a receive circuit configured to receive wireless communications using either the first antenna or the second antenna. The wireless communication apparatus further includes a controller configured to switch the transmit circuit and the receive circuit from transmitting and receiving wireless communications via the first antenna to transmit and receive wireless communications via the second antenna in response to detecting that a first receive power level of the first antenna is less than a second receive power level of the second antenna and a difference between the second receive power level and the first receive power level is greater than a threshold. | 11-21-2013 |
20140200046 | APPARATUS AND METHOD FOR MITIGATING VOLTAGE DROOP IN DUAL-TRANSCEIVER WIRELESS COMMUNICATION DEVICE - Aspects of the present disclosure relate to a user equipment (UE) and a method of wireless communication using the UE that includes a first transceiver and a second transceiver. The method includes determining that the first transceiver is scheduled to communicate using a first transmission simultaneous to the second transceiver being scheduled to communicate using a second transmission, and altering an operation of at least one of the first and second transceivers to mitigate battery voltage droop due to simultaneous transmissions of the transceivers. Other aspects, embodiments, and features are also claimed and described. | 07-17-2014 |
20150119103 | Priority Management for Multiple Concurrently Active Technologies - Methods, systems and devices for prioritizing communication technologies to allocate resources in a mobile device. The mobile device may employ a dual subscription, dual active (DSDA) configuration in which two subscriptions may be associated with concurrently active communications, such as voice or data calls. The mobile device may identify current states that indicate the type of communications associated with the subscriptions. In an embodiment, an applications processor within the mobile device may perform the state identifications. The mobile device may determine priorities of the concurrently active subscriptions based on the identified states. In an embodiment, the priorities may be determined by a modem processor within the mobile device. When the priorities are determined to be the same, the mobile device may perform a tiebreaker algorithm to further identify priorities. Based on the determined priorities, the mobile device may allocate resources to favor the subscription with the higher priority. | 04-30-2015 |
20150264743 | SINGLE ANTENNA SHARING FOR MULTIPLE WIRELESS CONNECTIONS - A wireless device includes: a first radio and first transceiver configured to transmit and receive according to a first radio access technology; a second radio and second transceiver configured to transmit and receive according to a second radio access technology; a first antenna and a second antenna connected to the first radio and the second radio; a switch; and a control unit configured to control the switch to configure connections of the first and second antennas to the first and second radios. The control unit is configured to control the switch to disconnect the second radio from the second antenna in response to a receiving, by the second radio through the second antenna, a signal that is below a predetermined threshold, and to connect the second radio to the first antenna during a wakeup period of the second radio. | 09-17-2015 |
20150282057 | Opportunistic Mobile Receive Diversity (OMRD) in a Dual-SIM Dual-Active (DSDA) Device - Methods and devices are disclosed for implementing opportunistic mobile receive diversity (“OMRD”) on a multi-SIM wireless device. The wireless device may receive a request from a protocol stack associated with the first SIM to utilize the second RF resource for receive diversity, and determine whether a protocol stack associated with the second SIM currently has a lower priority than the protocol stack associated with the first SIM. Upon determining that the protocol stack associated with the second SIM currently has a lower priority than the protocol stack associated with the first SIM, the wireless device may grant control of the second RF resource to the protocol stack associated with the first SIM. Granting control may provide, to the protocol stack associated with the first SIM, a capability to enable and disable receive diversity using the first and second RF resources. | 10-01-2015 |
20150282059 | Wireless System Selection Factoring RF Resource Availability in Dual Access Phones - Methods, devices, and systems embodiments enable management of service preemption of at least one of a plurality of subscriptions that utilize a plurality of radio-frequency (RF) chains on a multi-Subscriber-Identity-Module, multi-active communication device in a manner that can accommodate a variety of different RF hardware components and configurations. Various embodiments provide methods implemented by a processor to manage service preemption. In response to detecting that a service of a second subscription initiated on a first RF chain is or will preempt a service of a first subscription that is also serviced by the first RF chain, the processor may determine whether there is a similar service on a second RF chain that may be used as a substitute for the first subscription's preempted service and, when available, the processor may configure the first subscription to begin utilizing the substitute service until the first RF chain is available. | 10-01-2015 |
20150327099 | Opportunistic Power Detection and Antenna Tuner Measurement During Concurrency - Methods implemented in a mobile communication device (e.g., a dual-SIM-dual-active or multi-SIM-multi-active communication device) for improving accuracy of radio-frequency (RF) output power measurements include opportunistically scheduling when a power detector takes RF output power measurements of a radio access technology (“RAT”). In various embodiments, a processor of the mobile communication device may ensure that the power detector takes an accurate RF output power measurement of the RAT by identifying an upcoming time window during which the RAT's transmit power is not artificially reduced as a result of performing transmit blanking/zeroing or artificially increased by transmissions originating from one or more other RATs operating on the device, and configuring or scheduling the power detector to take RF output power measurements of the RAT during that upcoming time window. A priority of the measured RAT may be increased in response to repeated delays in obtaining an RF output power measurement. | 11-12-2015 |
20150334574 | Preventing Coexistence Interference Through Smart Band Selection in MSMA Devices - Various embodiments leverage the typical manner in which a RAT selects a supported frequency band listed in its acquisition database and the standard communications with its network indicating the supported frequency bands to avoid potential coexistence events with one or more other RATs. In particular, various embodiments include methods for avoiding band interference between RATs operating on a multi-SIM communication device by identifying the frequency bands available to each of the RATs, comparing the identified frequency bands to determine whether any RAT's frequency bands will interfere with one or more other RAT's frequency bands, and in response to determining that there is a possibility of frequency band interference, removing those interfering frequency bands from that RAT's acquisition database. As a result, during standard communications, that RAT will report to its network that it supports only non-interfering frequency bands. | 11-19-2015 |
20150334578 | Using Client-Specific RGS To Improve Performance on Multi-SIM and Multi-RAT Devices - Various embodiments provide methods implemented in a mobile communication device (e.g., a multi-RAT communication device) for maintaining at least one separate RGS value for each of a plurality of RATs operating on the mobile communication device. Specifically, a device processor on the mobile communication device (e.g., a crystal oscillator manager) may maintain a separate, up-to-date RGS value for each of the plurality of RATs and may associate each of the plurality of RATs with their respective RGS values. By keeping track of the plurality of RATs' respective RGS values, the device processor may ensure that an appropriate RGS value is used to facilitate each RAT's individual operations, such as acquisition/re-acquisition operations, sleep scheduling calculations, and handover/inter-RAT measurement operations. As a result, various embodiments may improve the performance of each RAT and the overall performance of the mobile communication device. | 11-19-2015 |
20150349869 | ENHANCED OPPORTUNISTIC MOBILE RECEIVE DIVERSITY FOR DUAL-SIM DUAL-ACTIVE MOBILE DEVICE - A method for performing mobile receive diversity may include: enabling a first receive chain associated with a first radio access technology (RAT) to receive one or more signals from a second RAT; receiving second RAT signals on a second receive chain; enabling receive diversity on a modem associated with a second receive chain; generating, by a diversity receiver, a receive diversity signal based on the one or more second RAT signals received by the first receive chain during periods of time the first receive chain does not receive a signal from the first RAT; and outputting the generated receive diversity signal to a decoder for the second RAT. | 12-03-2015 |
20150381291 | Tiered Approach to Radio Frequency (RF) Co-existence - Various embodiments implemented on a mobile communication device leverage the availability of a plurality of coexistence mitigation strategies to choose a coexistence mitigation strategy that may be most successful in avoiding and/or mitigating coexistence interference between an aggressor RAT and a victim RAT. In response to determining that a coexistence event between the aggressor RAT and the victim RAT is occurring or is about to occur, a processor on the mobile communication device may determine various priority criteria related to the mobile communication device's current circumstances (e.g., network resources, device resources, etc.) and/or related to each available coexistence mitigation strategy. Using these determined priority criteria, the device processor may select and implement a coexistence mitigation strategy that may be the most suitable for avoiding/mitigating coexistence interference between the aggressor RAT and the victim RAT given the current condition, circumstances, etc. of the mobile communication device. | 12-31-2015 |
20150382362 | RESOURCE SPECIFIC INTERFERENCE MITIGATION - Methods, systems, and devices are described for identifying and mitigating in-device coexistence interference for multicarrier systems implementing soft combining decoding techniques. In some aspects, the described techniques include identifying time-frequency resources of a received signal subject to coexistence interference at a transceiver of a wireless device. The time-frequency resources may include, for example, symbols, slots, code-blocks, sub-frames, subcarriers, etc. Resource-specific mitigation may then be applied to the identified resources, for example, including skipping or nulling the interfered resources in the time domain, frequency domain, or both. In some aspects, the resource-specific mitigation may be performed at the soft-combining stage of the decoding process, such as by skipping or nulling one or more log likelihood ratio (LLR) instances that correspond to the interfered resource(s). | 12-31-2015 |