Abstract:
PROBLEM TO BE SOLVED: To provide a method for reducing RF interference in a wireless network.SOLUTION: Interference that occurs during wireless communication may be managed by using partial reuse and other technique. In some aspects, the partial reuse relates to HARQ interlace, portions of a time slot, frequency spectrum, and extended code. The interference may be managed by using a transmit power profile and/or an attenuation profile. The interference also may be managed by using power management-related technique.
Abstract:
PROBLEM TO BE SOLVED: To provide a communications device that can be supported with a simple calibration procedure that can not only support different operating frequencies and temperatures, but can also support multi-media modes of operation.SOLUTION: Systems and techniques for gain control include: amplifying a signal with an amplifier having a gain represented by one of a plurality of gain curves depending on a value of a parameter, the signal being amplified at a first one of the parameter values; and controlling the gain of the amplified signal from a predetermined gain curve relating to the gain curve of the amplifier for a second one of the parameter values by adjusting a gain control signal corresponding to a point on the predetermined gain curve as a function of the first one of the parameter values, and by applying the adjusted gain control signal to the amplifier.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for a quick retransmission of signals in a communication system.SOLUTION: A transmitting terminal, transmits transmission signals in a form of packets to a receiving terminal, if the packet was intended for the receiving terminal, and the receiving terminal demodulates the packet. The receiving terminal then computes a quality metric of the packet, and compares the computed quality metric with a quality metric contained in the packet. If the quality metrics match, the packet is forwarded for further processing. If the quality metrics fail to match, the receiving terminal sends a request for retransmission of the packet. The transmitting terminal determines which packet needs to be retransmitted based on the request for retransmission. If delivery of the packet in accordance with the aforementioned description fails, retransmission in accordance with conventional sequence-number-based schemes, e.g., radio link protocol, is attempted.
Abstract:
PROBLEM TO BE SOLVED: To increase the throughput in a sector.SOLUTION: Upon successful decoding of a first set of slots of a first data packet, an access network (AN) can send an acknowledge message (ACK) to an access terminal (AT) to indicate that the AN has successfully decoded the data received in the first set of slots of the first data packet. Upon unsuccessful decoding of the first set of slots of the first data packet, the AN can send a negative acknowledge message (NAK) to the AT to indicate that the AN has not successfully decoded the data received in the first set of slots of the first data packet. Based upon receipt of the NAK, the AT can resend the data by sending a second set of slots of the first data packet containing redundant data. Based upon receipt of the ACK, the AT can send a first set of slots of another packet.
Abstract:
PROBLEM TO BE SOLVED: To improve use of forward direction link and reduce delay in transmission of high rate packet data in the data communication system enabling variable rate transmission. SOLUTION: Data transmission in the forward direction link 50 is time-multiplexed and a base station 4 executes transmission to a mobile station 6 in the maximum data rate supported with the forward direction link 50 in each time slot. The data rate is determined by the C/I measurement where the forward direction link signal becomes largest as measured at the mobile station 6. When a data packet received erroneously is determined, the mobile station 6 transmits a NACK message to be returned to the base station 4. The NACK message results in re-transmission of the data packet received erroneously. The data packets can be transmitted out of sequence by the use of the number of sequences to identify each data unit within the data packets. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for transmitting/receiving variable rate data. SOLUTION: The data are spread by using a long pseudo noise code generated by a linear feedback PN generator 16, and the mask is selected by a mask selector 14 in accordance with speed of transmission of the variable data and the specific user who transmits the data. Thus, the data rate can be determined by identifying which mask allows the received waveform to be correctly despread at the receiver. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve utilization of the forward link and to decrease the transmission delay by high rate packet data transmission in a data communication system capable of variable rate transmission. SOLUTION: Data transmission on the forward link is time multiplexed and a base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve voice quality, reduce cost, and increase efficiency in a wireless communication system while reducing bandwidth requirements.SOLUTION: Frames of a known rate are properly selected and dropped to reduce the overhead required for communication of background noise. The present invention comprises a method of communicating background noise including the steps of transmitting background noise, blanking subsequent background noise data rate frames used to communicate the background noise, receiving the background noise, and updating the background noise.
Abstract:
PROBLEM TO BE SOLVED: To provide methods and systems for providing enhanced position location in wireless communications.SOLUTION: Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g., data) transmission by a "known" transmission (or "reference transmission") at a predetermined time known to access terminals in the corresponding sectors. The access terminals may use the received reference signal to perform a position-location measurement, and report back the measured information. The access point may also send a reference transmission on demand, e.g., in response to a request from an access terminal in need of a location-based service.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for tracking signals in a wireless communication system.SOLUTION: A base station includes a rake antenna having multiple fingers. When any of the fingers goes out of lock, the base station waits for a predetermined time period and then adjusts a lock detect filter. The adjustment is based on comparison of received signal energy with an adjusted energy threshold. The comparison may result in an increased energy level of the filter. In one embodiment, if a mobile station is in soft hand-off, the base station ignores the lock state of the fingers and transmits power control information based on the received signal energy. If the mobile station is not in soft hand-off, a predetermined power control pattern is applied for gradual power adjustment.