Patent application number | Description | Published |
20120044919 | Wireless Transceivers with Filter Arrangement for WiFi and WiMAX Coexsistence - Embodiments provide WiFi and WiMAX tailored transceiver radio frequency (RF) filtering techniques and configurations to enable coexistence between WiFi and WiMAX transceivers operating in close proximity. In particular, embodiments provide filtering techniques to reject emissions from WiMAX into WiFi, and vice versa. The filtering techniques eliminate the need for additional isolation between WiMAX and WiFi antennas (approximately 50 dB), which is beyond what is achievable in practice. Embodiments can be tailored according to different use cases of the WiFi and WiMAX transceivers (e.g., fixed CPE, portable router, smart phone with tethering). | 02-23-2012 |
20120142291 | Distribution of Transmit Signal to Multiple Transmit Antennas for Reduction of Measured Specific Absorption Rate - Various embodiments of the present invention recognize at least two zones of operation for a communication device. In a first zone, which is sufficiently spaced away from a human head or body that SAR limits will be met, transmit power delivered to an antenna of a communication device may be maximized within any other constraints under which the communication device operates. In a second zone, which is not sufficiently spaced away from a human head or body, transmit power is redistributed such that SAR limitations are met without affecting the transmit power control loop of the communication device. For example, a second antenna physically disposed at a different location within the communication device may be used either instead of, or in addition to, the first transmit antenna in order that the SAR limits are met. | 06-07-2012 |
20120213149 | Method and System for Power Headroom Reporting in the Presence of Multiple Transmit Antennas - A method and system are provided in which a mobile device may be operable for long term evolution (LTE) communication or some other wireless technology via two or more transmit antennas. The device may comprise a power amplifier for each transmit antenna with substantially similar maximum power being provided by both amplifiers. A power headroom value may be determined in the device based on path loss values between the transmit antennas and a base station and the maximum transmit power for each transmit antenna. Transmission via one of the transmit antennas may occur concurrently with transmission via another of the transmit antennas. The device may generate an indication of the determined power headroom value for communication to the base station. The power headroom value may be reported periodically or in response to a change in the power received at the base station. | 08-23-2012 |
20130130694 | WIRELESS COMMUNICATION DEVICE CAPABLE OF EFFICIENT HANDOFFS - A wireless communication device is disclosed that is capable of performing efficient handoffs in order to maximize connection time with either a serving or target base station. The wireless communication device performs measurements of only intra-frequency base stations to avoid retuning its radio module. Based on this information, as well as stored information relating to nearby base stations, the serving base station is able to estimate a position of the wireless communication device and compare the estimated position to positions of the known base stations in order to make a handoff decision. In addition, by storing information during measurement or handoff preparation, the device is capable of skipping handoff steps, immediately return to the serving base station after handoff failure, and/or perform streamlined PLMN searching. | 05-23-2013 |
20130130751 | WIRELESS COMMUNICATION DEVICE HAVING REDUCED POWER CONSUMPTION - A wireless communication device is disclosed that is capable of reduced power consumption. Uplink and downlink sub-frames in a WiMAX, 802.16m or LTE environment often include several vacant symbols during which power-hungry hardware and software components need not operate at full power. By analyzing a physical layer beacon and control information of a received signal, the specific locations of data bursts can be determined, as well as periods of needed operation of a receiver module to effectively decode those data bursts. The receiver module can otherwise be controlled to operate in a LOW power state during remaining periods of vacant time, thereby conserving power consumption and extending battery life. | 05-23-2013 |
20130170418 | Wireless Communication Device Capable of Scanning for Available Base Stations Using Reduced Bandwidth - A wireless communication device is disclosed that includes multiple antennas capable of being used for carrier aggregation, and that uses its additional antennas to scan for available base stations without interfering with connectivity to a current base station and/or while maximizing useable bandwidth. The wireless communication device may scan using multiple of the antennas to maximize scanning results and reduce scan time, and may scan for available base stations using some of its antennas while maintaining its connection to the current base station with its other antennas. The device can also analyze control channel portions of received signals to utilize periods of signal inactivity to scan for available base stations, such as DRX or SPS modes of operation. In addition, the device can measure various parameters to optimize its scanning capabilities. | 07-04-2013 |
20130198582 | SUPERCHARGED CODES - A system and method is provided for encoding k input symbols into a longer stream of n output symbols for transmission over an erasure channel such that the original k input symbols can be recovered from a subset of the n output symbols without the need for any retransmission. A symbol is a generic data unit, consisting of one or more bits, that can be, for example, a packet. The system and method utilize a network of erasure codes, including block codes and parallel filter codes to achieve performance very close to the ideal MDS code with low encoding and decoding computational complexity for both small and large encoding block sizes. This network of erasure codes is referred to as a supercharged code. The supercharged code can be used to provide packet-level protection at, for example, the network, application, or transport layers of the Internet protocol suite. | 08-01-2013 |
20130198583 | Systematic Rate-Independent Reed-Solomon Erasure Codes - The present disclosure is directed to a system and method for encoding k input symbols, using a Reed-Solomon erasure correction code, into a longer stream of n output symbols for transmission over an erasure channel. The present disclosure is further directed to a system and method for recovering the original k input symbols from only (and any) k output symbols (out of the n output symbols) received over the erasure channel. A symbol is a generic data unit consisting of one or more bits that can be, for example, a packet. The systems and methods of the present disclosure provide for an adjustable code rate that can be readily adapted based on changing channel conditions without having to reconstruct the encoder/decoder. As a result, such an encoder/decoder can be referred to as rate-independent. | 08-01-2013 |
20130343252 | Power Saving for Mobile Terminals - Embodiments provide power saving schemes for a user equipments (UE) in low power supply state. The power saving schemes include network-assisted power saving schemes and UE-triggered power saving schemes. Network-assisted power saving schemes require network awareness of the low power supply state of the UR Thus, embodiments provide the UE the ability to communicate its power supply state to the network. UE-triggered power saving schemes may or may not require network awareness of the UE s power supply state andd/or of the execution of the HE-triggered power saving scheme at the UE. | 12-26-2013 |
20140092720 | User equipment optimization for multimedia broadcast multicast service - A technique to receive a Multimedia Broadcast Multicast Service (MBMS) broadcast, in which a plurality of source symbols and repair symbols of a broadcast from a broadcast source are received at a UE. The source symbols and repair symbols are based on fountain codes, so that not all of the repair symbols are used to recover the originally sourced data. An application layer of the UE recovers the sourced data and places the receiver in a power-save mode following the last repair symbol used to recover the sourced data, so that remaining repair symbols are not received by the receiver and subsequently processed. | 04-03-2014 |
20140141732 | Wireless Transceivers with Filter Arrangement for WiFi and LTE Coexistence - Embodiments provide WiFi and LTE tailored transceiver radio frequency (RF) filtering techniques and configurations to enable coexistence between WiFi and LTE transceivers operating in close proximity. In particular, embodiments provide filtering techniques to reject emissions from LTE into WiFi, and vice versa. The filtering techniques eliminate the need for additional isolation between LTE and WiFi antennas (approximately 50 dB), which is beyond what is achievable in practice. Embodiments can be tailored according to different use cases of the WiFi and LTE transceivers (e.g., fixed CPE, portable router, smart phone with tethering). | 05-22-2014 |
20140148118 | SYNCHRONOUS SOS MESSAGING IN A CELLULAR NETWORK - Embodiments provide methods and systems for transmitting an emergency (SOS) message from a user (UE) to a cellular network in a highly robust and energy efficient manner. Specifically, embodiments enable the SOS message to be sent in a synchronous manner despite the asynchronous nature of the network, which significantly enhances the probability of successful reception of the SOS message by at least one base station (eNodeB) of the network. Embodiments further provide highly robust SOS message transmission and reception schemes configured to enhance the successful detection and decoding of the SOS message by at least one base station of the cellular network. In addition, embodiments enable the synchronous transmission of the SOS message to the network without requiring network attachment by the UE. This makes embodiments highly suited for emergency situations in which network coverage is affected and can enable significant and precious power savings at the UE. | 05-29-2014 |
20140148119 | Emergency (SOS) Mode Enhancements for Cellular Networks - Systems and methods for enabling a group of user equipments located in an emergency area to cooperatively transmit an emergency (SOS) message to a cellular network and to cooperatively receive an SOS message (or response) from the cellular network are provided. Embodiments further provide a scheme for enabling dedicated receivers, and/or user equipments that are attached to the cellular network to serve as relay stations for SOS messages, thereby extending the coverage of the cellular network to the emergency area. | 05-29-2014 |