Abstract:
PROBLEM TO BE SOLVED: To improve use of a forward link by high rate packet data transmission and to decrease a transmission delay 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)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for controlling data rates for communication to and from a base station (2) and a plurality of remote users (4). SOLUTION: The usage of the communications resource whether the forward- link resource, from the base station (2) to remote users (4), or a reverse-link resource, from the remote users (4) to the base station (2) is measured. The measured usage value is compared against at least one predetermined threshold and the data rates of communication or a subset of communications on the communications resource is modified according to the comparisons. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a data communication system capable of variable rate transmission, in which high rate packet data transmission improves utilization of a forward link and decreases transmission delay.SOLUTION: Data transmission on the forward link is time multiplexed and a base station 4 transmits at the highest data rate supported by the forward link at each time slot to one mobile station 6. The data rate is determined by the largest C/I measurement of forward-link signals when 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 packet can be transmitted out of a sequence by the use of a sequence number to identify each data unit within the data packet.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for improving the throughput during transmission of data packets within a plurality of time slots in a high data rate communication system.SOLUTION: A method for receiving a first packet from a source network node includes: generating a data rate control signal based on signal quality of a received signal transmitted by the source network node; sending the data rate control signal to the source network node; receiving a first signal having a data rate based on the data rate control signal from the source network node; measuring signal quality of the first signal to form a first signal quality metric; and sending a first feedback signal based on the first signal quality metric.
Abstract:
PROBLEM TO BE SOLVED: To provide techniques to improve the acquisition process in a spread spectrum environment. SOLUTION: A transmission apparatus includes: a spreader configured to receive pilot data, spread the pilot data through one set of PN sequences and to output the spread pilot data; a PN generator coupled to the spreader and configured to output a set of PN sequences generated based on property equations: P I,2 =x 15 +x 10 +x 8 +x 7 +x 6 +x 2 +1 and P Q,2 =x 15 +x 12 +x 11 +x 10 +x 9 +x 5 +x 4 +x 3 +1; a modulator coupled to the spreader and configured to modulate the spread pilot data and to output a modulated signal; and a transmitter coupled to the modulator and configured to receive and adjust the modulated signal and to output a spread spectrum signal. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation:要解决的问题:提供在扩展频谱环境中改进采集过程的技术。 解决方案:传输设备包括:扩展器,被配置为接收导频数据,通过一组PN序列扩展导频数据并输出扩展的导频数据; PN发生器,其耦合到所述扩展器并且被配置为输出基于特性方程生成的一组PN序列:P I,2 SB> = x 15 SP> + x / SP> + x 8 SP> + x 7 SP> + x 6 SP> + x 2 SP> +1和P Q,2 SB> = X 15 SP> + X 12 SP> + X 11 SP> + X 10 SP> + X < SP> 9 SP> + X 5 SP> + X 4 SP> + X 3 SP> 1; 耦合到扩展器并被配置为调制扩展导频数据并输出调制信号的调制器; 以及耦合到调制器并被配置为接收和调整调制信号并输出扩频信号的发射机。 版权所有(C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a communication system capable of completing soft hand-off, even when a communication link between an active base station and a mobile station deteriorates before the mobile station receives a handoff direction message. SOLUTION: A device for wireless communications (hereinafter referred to as device) maintains a list of base stations X that the mobile station is in communication with, referred to as an "Active Set". Further, the device maintains another list of base stations Y close to the base stations X in the Active Set. The list is called a "Neighbor Set". A memory in the device includes information which enables the device to demodulate information transmitted from the base stations Y in the Neighbor Set. When a base station Y is included in a pilot strength measurement message (PSMM), the device places the base station Y in the Active Set. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To determine use of receive diversity in a mobile station. SOLUTION: A control system 210 determines a demand level about usage of a communicating resource. A sender transmits a message, which shows the usage of receive diversity in the mobile station based on the determined demand level. After receiving one channel, the receiver 200 determines a transmitting power level of the channel for being at a lower or upper transmit power level limit. Based on the determined transmitting power level, the control system 210 controls the receive diversity by choosing the number of receiver chains 290. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve utilization of the forward link and to decrease the transmission delay through 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 the 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)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for controlling data rates for communications to and from a base station (2) and a plurality of remote users (4). SOLUTION: The usage of the communications resource whether the forward-link resource, from the base station (2) to remote users (4), or a reverse-link resource, from the remote users (4) to the base station (2) is measured. The measured usage value is compared against at least one predetermined threshold and the data rates of communication or a subset of communications on the communications resource is modified according to the comparisons. COPYRIGHT: (C)2007,JPO&INPIT