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    • 6. 发明授权
    • Apparatus for improving performance at low power region in a Doherty amplifier
    • 用于改善Doherty放大器低功率区域性能的装置
    • US08188789B2
    • 2012-05-29
    • US13035086
    • 2011-02-25
    • Young-Yoon WooHan-Seok KimDong-Geun LeeBum-Man KimJung-Hwan Moon
    • Young-Yoon WooHan-Seok KimDong-Geun LeeBum-Man KimJung-Hwan Moon
    • H03F3/68
    • H03F1/0288
    • A method and apparatus improve the performance of a carrier amplifier in a Doherty amplifier. The Doherty amplifier includes a power divider, a carrier amplifier, at least one peaking amplifier, offset lines, and a Doherty circuit. The power divider provides a power signal to each of the carrier amplifier and the at least one peaking amplifier. The carrier amplifier amplifies power of a signal inputted from the power divider. The at least one peaking amplifier amplifies power of a signal inputted from the power divider. The offset lines control a load impedance when the at least one peaking amplifier does not operate. When the at least one peaking amplifier does not operate, the Doherty circuit generates the load impedance of the carrier amplifier that is larger than twice a load impedance at the maximum output power of the carrier amplifier.
    • 一种方法和装置改善了Doherty放大器中载波放大器的性能。 Doherty放大器包括功率分配器,载波放大器,至少一个峰化放大器,偏移线和Doherty电路。 功率分配器向每个载波放大器和至少一个峰化放大器提供功率信号。 载波放大器放大从功率分配器输入的信号的功率。 至少一个峰值放大器放大从功率分配器输入的信号的功率。 当至少一个峰值放大器不工作时,偏移线控制负载阻抗。 当至少一个峰化放大器不工作时,Doherty电路在载波放大器的最大输出功率下产生大于负载阻抗的两倍的载波放大器的负载阻抗。
    • 7. 发明申请
    • METHOD AND APPARATUS FOR COMPENSATING QOS DURING HANDOVER BY BASE STATION IN WIRELESS BROADBAND ACCESS SYSTEM
    • 在无线宽带接入系统中通过基站进行切换来补偿QOS的方法和装置
    • US20110090871A1
    • 2011-04-21
    • US12902628
    • 2010-10-12
    • Jae-Young KIMHan-Seok KIMHo-Young CHOISoo-Yong SHINBong-Joo KIM
    • Jae-Young KIMHan-Seok KIMHo-Young CHOISoo-Yong SHINBong-Joo KIM
    • H04W4/00
    • H04W36/0044H04W36/08
    • An apparatus and method for compensating Quality of Service (QoS) during a handover of a Mobile Station (MS) by a serving Base Station (BS) and a target BS in a wireless broadband access system are provided. The method includes generating a message during a handover from the serving BS to a target BS, the message including at least one of a data transmission/reception time just before the handover, a size of a time window for which a data transmission/reception history is recorded in an accumulated way, and an amount of data transmitted/received during the time window, and transmitting the message to the target BS. The target BS can more accurately find a handover break time and the amount of data transmission/reception in the serving BS at the time the MS has been handed over to the target BS, enabling fast and adequate QoS compensation/correction for each QoS class, and thus facilitating flexible, efficient and accurate QoS provisioning regardless of controlled handover and uncontrolled handover.
    • 提供了一种在无线宽带接入系统中由服务基站(BS)和目标BS在移动台(MS)进行切换期间补偿服务质量(QoS)的装置和方法。 该方法包括在从服务BS到目标BS的切换期间生成消息,该消息包括刚好在切换之前的数据发送/接收时间中的至少一个,数据发送/接收历史 以累积的方式记录,以及在时间窗口期间发送/接收的数据量,并将消息发送到目标BS。 目标BS可以更精确地找到切换中断时间和在MS已经切换到目标BS时在服务BS中的数据发送/接收量,使得能够对每个QoS类进行快速和适当的QoS补偿/校正, 并且因此促进灵活,有效和准确的QoS配置,而不管受控的切换和不受控制的切换。
    • 8. 发明授权
    • Method and apparatus for managing a buffer in a communication system
    • 用于管理通信系统中的缓冲器的方法和装置
    • US07835277B2
    • 2010-11-16
    • US11950623
    • 2007-12-05
    • Ki-Back KimEun-Chan ParkHan-Seok Kim
    • Ki-Back KimEun-Chan ParkHan-Seok Kim
    • H04L12/28
    • H04W72/1242H04L65/80H04W72/1231
    • A method and apparatus for managing a buffer of a Radio Access Station (RAS) in a communication system are provided. An available buffer space determiner sets a threshold for each service class for scheduling packet input/output of the buffer according to priority of a service class, estimates and stores, upon receipt of a packet at the buffer, an available space size of the buffer after the packet reception, compares the estimated available space size of the buffer with a first threshold corresponding to a first service class indicative of a service class of the packet, and schedules packet input/output of the buffer according to the comparison result. A processor module schedules packet input/output of the buffer according to an output of the available buffer space determiner. The present invention can improve quality of services through service differentiation based on priorities of service classes and buffer management based on characteristics of the corresponding service traffics.
    • 提供了一种用于在通信系统中管理无线电接入站(RAS)的缓冲器的方法和装置。 可用的缓冲区空间确定器根据服务类别的优先级设置每个服务类别的阈值以调度缓冲器的分组输入/输出,在缓冲器接收到分组时估计和存储缓冲器的可用空间大小 分组接收将缓冲器的估计可用空间大小与指示分组的服务类别的第一服务类别相对应的第一阈值进行比较,并且根据比较结果调度缓冲器的分组输入/输出。 处理器模块根据可用缓冲区空间确定器的输出调度缓冲区的分组输入/输出。 本发明可以基于服务类别的优先级和基于相应业务流量特性的缓冲管理来提高业务差异化服务质量。