Method and apparatus for preventing received data from corrupting previously processed data in a wireless communications system
    2.
    发明授权
    Method and apparatus for preventing received data from corrupting previously processed data in a wireless communications system 有权
    用于防止接收的数据在无线通信系统中破坏先前处理的数据的方法和装置

    公开(公告)号:US07158482B2

    公开(公告)日:2007-01-02

    申请号:US10068443

    申请日:2002-02-06

    摘要: A communication system includes a forward link from a base station to multiple mobile units, the forward link having multiple shared channels (SHCH's), multiple shared control channels (SHCCH's), and multiple dedicated pointer control channels (DPTRCH's), and utilizes HARQ error control for error detection and error correction. The mobile unit, when listening to the DPTRCH, uses a SHCCH pointed to by the DPTRCH to demodulate and decode data on the SHCH. Throughput problems may arise in the system when the mobile unit combines and decodes the wrong SHCH data, that is, SHCH data that is intended for a different mobile unit, or may incorrectly decodes SHCH data that is intended for the mobile unit. In order to improve the data throughput of the system, the systems employs a flush test and an energy detector test to prevent improperly decoded data blocks from corrupting properly decoded data blocks.

    摘要翻译: 通信系统包括从基站到多个移动单元的前向链路,具有多个共享信道(SHCH)的前向链路,多个共享控制信道(SHCCH)和多个专用指针控制信道(DPTRCH)),并且利用HARQ错误控制 用于错误检测和纠错。 移动单元在收听DPTRCH时使用由DPTRCH指向的SHCCH对SHCH上的数据进行解调和解码。 当移动单元组合和解码错误的SHCH数据,即针对不同移动单元的SHCH数据,或可能不正确地解码旨在用于移动单元的SHCH数据时,系统中可能出现吞吐量问题。 为了提高系统的数据吞吐量,系统采用冲洗测试和能量检测器测试,以防止不正确解码的数据块破坏正确解码的数据块。

    Method and apparatus for producing channel estimate of a communication channel in a CDMA communication system
    3.
    发明授权
    Method and apparatus for producing channel estimate of a communication channel in a CDMA communication system 有权
    用于在CDMA通信系统中产生通信信道的信道估计的方法和装置

    公开(公告)号:US06192040B1

    公开(公告)日:2001-02-20

    申请号:US09293318

    申请日:1999-04-16

    IPC分类号: H04J1302

    摘要: A method and apparatus in WCDMA communication system includes extracting pilot symbols (462-5) of (2-M) plurality of communication channels of (1-M) plurality of communication channels based on corresponding 2-M assigned codes (405-436) to produce a plurality (2-M) of extracted pilot symbols (482-96), and combining a first (1) extracted pilot symbol (420) of a first (1) communication channel of (1-M) plurality of communication channels and the plurality (2-M) of extracted pilot symbols (482-96), to produce a combined extracted pilot symbol (498) which is used to produce a combined channel estimate (417) for decoding a first (1) extracted data symbol (414) of first (1) communication channel of (1-M) plurality of communication channels.

    摘要翻译: WCDMA通信系统中的方法和装置包括基于对应的2-M分配码(405-436)提取(1-M)多个通信信道的(2-M)多个通信信道的导频符号(462-5) (2-M)个提取的导频符号(482-96),并且组合(1-M)个多个通信信道的第一(1)个通信信道的第一(1)提取的导频符号(420) 和所述多个(2-M)所提取的导频符号(482-96),以产生用于产生用于解码第一(1)提取的数据符号的组合信道估计(417)的组合提取的导频符号(498) (1-M)个多个通信信道的第一(1)个通信信道的(414)。

    Multi channel stop and wait ARQ communication method and apparatus
    4.
    发明授权
    Multi channel stop and wait ARQ communication method and apparatus 有权
    多通道停止和等待ARQ通信方法和装置

    公开(公告)号:US07065068B2

    公开(公告)日:2006-06-20

    申请号:US09742905

    申请日:2000-12-20

    IPC分类号: H04B7/216 H04L1/18

    CPC分类号: H04L1/1803

    摘要: A method in a communication system (100) includes transmitting from a source user (101) a first data packet (111) over a first time frame (121) having a finite time period (131), transmitting from source user (101) a second data packet (112) over a second time frame (122) immediately subsequent to first time frame (121), detecting an acknowledgment of acceptable reception of data packet associated with either first or said second data packets (111 and 112), repeating transmission of first and second data packets (111 and 112) in a sequence of first and second time frames (121 and 122) in a time frame sequence (190) until the detection.

    摘要翻译: 通信系统(100)中的方法包括:通过具有有限时间段(131)的第一时间帧(121)从源用户(101)发送第一数据分组(111),从源用户(101)a 在第一时间帧(121)之后的第二时间帧(122)上的第二数据分组(112),检测与第一或所述第二数据分组(111和112)相关联的数据分组的可接受接收的确认,重复传输 在第一和第二时间帧(121和122)的序列中的时间序列(190)中的第一和第二数据分组(111和112)直到检测。

    Soft handoff between cellular systems employing different encoding rates
    6.
    发明授权
    Soft handoff between cellular systems employing different encoding rates 有权
    使用不同编码率的蜂窝系统之间的软切换

    公开(公告)号:US07046719B2

    公开(公告)日:2006-05-16

    申请号:US09801891

    申请日:2001-03-08

    IPC分类号: H04B15/00 H04K1/00 H04L27/30

    摘要: A receiver (200) is provided receiving signals from differing base stations (BTSA and BTSB). The signal from BTSA is encoded using a first rate convolutional encoder while the signal transmitted from BTSB is encoded using a second rate convolutional encoder. Since the multiple base station links may result in a different number of symbols being received for each bit transmitted, the symbols received for each link cannot be simply combined. Therefore, in the preferred embodiment of the present invention, the resulting symbols are passed to multiple branch metric circuits (210–211), where branch metrics (μi) for the symbols are obtained. After the ith branch metrics for the base stations are computed, the branch metrics for each base station are passed to a combiner (212) where they are combined.

    摘要翻译: 接收器(200)被提供为接收来自不同基站(BTS< A>和BTS< B> B>)的信号。 使用第一速率卷积编码器对来自BTS A的信号进行编码,而使用第二速率卷积编码器对从BTS B发送的信号进行编码。 由于多个基站链路可能导致针对所发送的每个比特接收到不同数量的符号,因此不能简单地组合每个链路所接收的符号。 因此,在本发明的优选实施例中,所得到的符号被传递到多个分支度量电路(210-211),其中获得用于符号的分支度量(μ∈Ii)。 在计算了基站的第i个分支度量之后,将每个基站的分支度量传递到组合器(212),在组合器(212)中组合它们。

    Method and apparatus for selecting a communication data rate between mobile and base stations
    7.
    发明授权
    Method and apparatus for selecting a communication data rate between mobile and base stations 有权
    用于在移动台和基站之间选择通信数据速率的方法和装置

    公开(公告)号:US06253063B1

    公开(公告)日:2001-06-26

    申请号:US09490606

    申请日:2000-01-25

    IPC分类号: H04B100

    摘要: A mobile station (110) selects an initial data rate for communication between base station (107) and mobile station (110). Mobile station (110) communicates the selected initial data rate to base station (107) through uplink (112). Base station (107) determines a difference level of interference condition experienced by mobile station (107) between a time when the initial data rate was selected by mobile station (110) and a time when base station (107) prepares to communicate to mobile station (110). Base station (107) selects a final data rate for transmission from base station (107) to mobile station (110) based on the determined difference level of interference condition. As such, the initial data rate may be modified to the final data rate while maximizing the down link capacity.

    摘要翻译: 移动台(110)为基站(107)和移动台(110)之间的通信选择初始数据速率。 移动站(110)通过上行链路(112)将所选择的初始数据速率传送到基站(107)。 基站(107)确定移动台(110)在初始数据速率被移动台(110)选择的时间与基站(107)准备与移动台通信的时间之间的移动台(107)所经历的干扰状况的差异水平 (110)。 基站(107)基于所确定的干扰条件差异来选择用于从基站(107)到移动台(110)的传输的最终数据速率。 因此,可以将最初的数据速率修改为最终数据速率,同时最大化下行链路容量。