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    • 1. 发明授权
    • SELECTING PAGING CHANNEL MODE
    • BETRIEBSARTAUSWAHLFÜRFUNKRUFKANAL
    • EP1428400B1
    • 2009-05-06
    • EP02759727.7
    • 2002-09-18
    • QUALCOMM INCORPORATED
    • CHEN, JiangxinNEUFELD, ArthurGLAZKO, SergueiAMERGA, Messay
    • H04W68/02
    • H04W68/025H04W24/00H04W52/0216H04W52/0245H04W68/00H04W72/08Y02D70/122
    • A quick paging channel (QPCH) is used to receive paging indicators that indicate that a wireless communication device (WCD) has a message on a paging channel relating to, for example, an incoming call to the WCD. When the condition of the quick paging channel is too low to receive paging indicators reliably, the quick paging channel is disabled to avoid false alarms, and the slotted paging channel is used to receive paging messages without monitoring the QPCH. When the QPCH signal is strong, the probability of false alarms is lower, and the quick paging channel is enabled. By using the quick paging channel to receive paging indicators only when the QPCH signal is strong, the wireless communication device can remain in a sleep state for greater periods of time as compared with the use of a slotted paging channel. As a result, standby time may be significantly improved.
    • 快速寻呼信道(QPCH)用于接收指示无线通信设备(WCD)在寻呼信道上具有与例如对WCD的呼入有关的消息的寻呼指示符。 当快速寻呼信道的条件太低而不能可靠地接收寻呼指示时,快速寻呼信道被禁用以避免虚假告警,并且时隙寻呼信道用于接收寻呼消息而不监控QPCH。 当QPCH信号强时,虚警告的概率较低,快速寻呼信道被使能。 通过使用快速寻呼信道仅在QPCH信号强时接收寻呼指示符,与使用时隙寻呼信道相比,无线通信设备可以保持更长时间的睡眠状态。 结果,可以显着提高待机时间。
    • 4. 发明授权
    • SYSTEM AND METHOD FOR DTX FRAME DETECTION
    • 方法和系统检测DTX帧
    • EP1295421B1
    • 2010-04-28
    • EP01950704.5
    • 2001-06-28
    • QUALCOMM INCORPORATED
    • GLAZKO, SergueiACHOUR, BaazizLIN, Yu-Chuan
    • H04J3/17H04W4/00H04B7/26H04J3/14
    • H04L1/20H04J3/14H04J3/17H04L1/201
    • A system and method for dectecting discontinuous transmission (DTX) frames. The inventive method includes the steps of receiving data transmitted in a pluralitz of frames (62); classifzing each of the frames (63); analyzing the classification of a number of successive frames of the received data and providing a metric with respect thereto; and determining, in response to the metric, if a frame is a discontinuous frame (66). In the illustrative embodiment, the step of classifzing includes the step of error checking the frames using a cyclic redundancz check (CRC) error checking protocol. The received frames are classified as good frames (G), erasureframes (E), or discontinuous frames (D). A numerical value is assigned toe ach of the frames based on the classification thereof. Next, the frames are filtered tp provice an output Yn=Yn-1+Xn where 'n' is a frame number, Yn is the filter output for a given frame n, Yn-1 is the filter output for a previous frame, and Xn is a stream of input frames. A threshold is set for the output Yn to facilitate the detection of discontinuous frames. That is, a detection of a discontinuous transmisson frame is indicated when a frame is classified as an 'erasure' and the filter output exceeds the threshold. On the detection of a discontinuous frame, the classification of the frame is changed from 'erasure' to 'discontinuous'. By reclassifying improperly classified erasure frames, the mobile receiver is inhibited from requesting retransmission of the frames of a change in the transmit power level. Consequently, network throughput and capacity are optimized and system power is conserved.