Collision detection
    1.
    发明申请
    Collision detection 有权
    碰撞检测

    公开(公告)号:US20030223476A1

    公开(公告)日:2003-12-04

    申请号:US10412576

    申请日:2003-04-14

    IPC分类号: H04B001/707

    摘要: An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal. The access-burst signal includes a collision-detection portion. In response to the BS-spread-spectrum receiver receiving the access-burst signal, the BS-spread-spectrum transmitter transmits an collision-detection signal with the collision detection portion. In response to the BS-spread-spectrum receiver not receiving the access-burst signal due to a collision with a collision access-burst signal, the BS-spread-spectrum transmitter transmits an collision-detection signal without the correct collision detection portion.

    摘要翻译: 对CDMA系统具有基站(BS)和多个远程站的采用扩频调制的码分多址(CDMA)系统的改进。 基站具有BS扩频发射机和BS扩频接收机。 远程站具有RS扩频发射机和RS扩频接收机。 BS发射机发送包括帧定时信号的广播公共同步信道。 广播共同同步信道具有公共芯片序列信号,这是多个远程站所共有的信号。 响应于接收广播公共同步信道的RS扩频接收机,并根据帧定时信号确定帧定时,RS扩频发射机发送接入突发信号。 接入突发信号包括冲突检测部分。 响应于接收到接入突发信号的BS扩频接收机,BS扩频发射机与冲突检测部分发送冲突检测信号。 响应于由于与冲突接入突发信号的冲突而没有接收到接入突发信号的BS扩频接收机,BS扩频发射机发送没有正确的冲突检测部分的冲突检测信号。

    Common packet channel
    2.
    发明申请
    Common packet channel 有权
    公共分组信道

    公开(公告)号:US20020027947A1

    公开(公告)日:2002-03-07

    申请号:US09941756

    申请日:2001-08-30

    摘要: An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal. The BS-spread-spectrum transmitter, responsive to the BS-spread-spectrum receiver receiving the access-burst signal, transmits an acknowledgment signal. In response to the first RS-spread-spectrum receiver receiving the acknowledgment signal, the first RS-spread-spectrum transmitter transmits a spread-spectrum signal having data.

    摘要翻译: 对CDMA系统具有基站(BS)和多个远程站的采用扩频调制的码分多址(CDMA)系统的改进。 基站具有BS扩频发射机和BS扩频接收机。 远程站具有RS扩频发射机和RS扩频接收机。 BS发射机发送包括帧定时信号的广播公共同步信道。 广播共同同步信道具有公共芯片序列信号,这是多个远程站所共有的信号。 响应于接收广播公共同步信道的RS扩频接收机,并根据帧定时信号确定帧定时,RS扩频发射机发送接入突发信号。 BS扩频发射机响应接收到接入突发信号的BS扩频接收机,发送确认信号。 响应于接收到确认信号的第一RS扩频接收机,第一RS扩频发射机发送具有数据的扩频信号。

    Common packet channel
    3.
    发明申请

    公开(公告)号:US20040057397A1

    公开(公告)日:2004-03-25

    申请号:US10667665

    申请日:2003-09-23

    IPC分类号: H04B007/216

    摘要: An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal. The BS-spread-spectrum transmitter, responsive to the BS-spread-spectrum receiver receiving the access-burst signal, transmits an acknowledgment signal. In response to the first RS-spread-spectrum receiver receiving the acknowledgment signal, the first RS-spread-spectrum transmitter transmits a spread-spectrum signal having data.

    Pre-data power control common packet channel
    4.
    发明申请
    Pre-data power control common packet channel 有权
    预数据功率控制公共分组信道

    公开(公告)号:US20040042429A1

    公开(公告)日:2004-03-04

    申请号:US10649816

    申请日:2003-08-28

    IPC分类号: H04B007/216

    摘要: An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal, which includes a plurality of RS-preamble signals, RS-power-control signals, and RS-pilot signals, respectively, transmitted in time, at increasing power levels. The BS-spread-spectrum transmitter, responsive to the BS-spread-spectrum receiver receiving the access-burst signal, and detecting an RS-preamble signal, transmits an acknowledgment signal. In response to the first RS-spread-spectrum receiver receiving the Acknowledgment signal, the first RS-spread-spectrum transmitter transmits a spread-spectrum signal having data.

    摘要翻译: 对CDMA系统具有基站(BS)和多个远程站的采用扩频调制的码分多址(CDMA)系统的改进。 基站具有BS扩频发射机和BS扩频接收机。 远程站具有RS扩频发射机和RS扩频接收机。 BS发射机发送包括帧定时信号的广播公共同步信道。 广播共同同步信道具有公共芯片序列信号,这是多个远程站所共有的信号。 响应于接收广播公共同步信道的RS扩频接收机,并根据帧定时信号确定帧定时,RS扩频发射机发送接入脉冲串信号,其包括多个RS- 前导信号,RS功率控制信号和RS导频信号,分别以增加的功率电平在时间上传输。 BS扩频发射机响应接收到接入突发信号的BS扩频接收机,并检测RS前同步信号,发送确认信号。 响应于接收到确认信号的第一RS扩频接收机,第一RS扩频发射机发送具有数据的扩频信号。

    Pre-data power control common packet channel
    5.
    发明申请
    Pre-data power control common packet channel 有权
    预数据功率控制公共分组信道

    公开(公告)号:US20020136272A1

    公开(公告)日:2002-09-26

    申请号:US10096312

    申请日:2002-03-13

    IPC分类号: H04B001/707

    摘要: An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal, which includes a plurality of RS-preamble signals, RS-power-control signals, and RS-pilot signals, respectively, transmitted in time, at increasing power levels. The BS-spread-spectrum transmitter, responsive to the BS-spread-spectrum receiver receiving the access-burst signal, and detecting an RS-preamble signal, transmits an acknowledgment signal. In response to the first RS-spread-spectrum receiver receiving the acknowledgment signal, the first RS-spread-spectrum transmitter transmits a spread-spectrum signal having data.

    摘要翻译: 对CDMA系统具有基站(BS)和多个远程站的采用扩频调制的码分多址(CDMA)系统的改进。 基站具有BS扩频发射机和BS扩频接收机。 远程站具有RS扩频发射机和RS扩频接收机。 BS发射机发送包括帧定时信号的广播公共同步信道。 广播共同同步信道具有公共芯片序列信号,这是多个远程站所共有的信号。 响应于接收广播公共同步信道的RS扩频接收机,并根据帧定时信号确定帧定时,RS扩频发射机发送接入脉冲串信号,其包括多个RS- 前导信号,RS功率控制信号和RS导频信号,分别以增加的功率电平在时间上传输。 BS扩频发射机响应接收到接入突发信号的BS扩频接收机,并检测RS前同步信号,发送确认信号。 响应于接收到确认信号的第一RS扩频接收机,第一RS扩频发射机发送具有数据的扩频信号。