Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers

    公开(公告)号:US06269250B1

    公开(公告)日:2001-07-31

    申请号:US09480474

    申请日:2000-01-10

    IPC分类号: H04B7185

    CPC分类号: H04W52/283 H04W52/367

    摘要: The present invention provides a method and apparatus for allowing a base station or base station controller to adjust transmissions to fixed location subscribers in closed-loop communication systems. In a closed-loop communication system, a base station exchanges signals with both fixed location and mobile user stations. When a user or subscriber initially registers with the base station, the base station determines a status of this subscriber based on, for example, an electronic serial number transmitted to the base station. The base station compares the electronic serial number to a database (Home Location Register) which determines whether the user corresponds to a fixed station or a mobile station. If the user is a fixed station, then the base station lowers nominal and minimum power level thresholds. Based on the lowered thresholds, the base station thereafter transmits forward link signals to the fixed station at a lower power level. As a result, the base station can increase its capacity due to the lower overall power rate.

    Extended range sequence numbering for selective repeat data transmission
protocol
    32.
    发明授权
    Extended range sequence numbering for selective repeat data transmission protocol 失效
    用于选择性重复数据传输协议的扩展序列编号

    公开(公告)号:US6011796A

    公开(公告)日:2000-01-04

    申请号:US877294

    申请日:1997-06-17

    IPC分类号: H04L1/16 H04L1/18 H04L12/56

    摘要: A method and apparatus for extending the sequence numbering range for a selective repeat transmission protocol is described. In accordance with one embodiment of the invention, data frames are transmitted including an eight-bit sequence number and a one-bit retransmit flag. The one bit retransmit flag indicates whether the frame is newly transmitted or retransmitted due to a failed first transmission. The transmit and receive systems each maintain a twelve-bit sequence number referred to as a "long sequence numbers" comprised of the eight-bit sequence number transmitted with each frame and a four-bit extension. The long sequence number is transmitted within control frames and the eight-bit sequence number is transmitted within the data frames.

    摘要翻译: 描述了用于扩展选择性重复传输协议的序列编号范围的方法和装置。 根据本发明的一个实施例,发送数据帧,包括八位序列号和一位重传标志。 一位重传标志指示由于第一次发送失败而是新发送还是重发帧。 发送和接收系统每个保持十二位序列号,称为“长序列号”,其由与每帧传输的八位序列号和四位扩展组成。 长序列号在控制帧内发送,8位序列号在数据帧内传输。

    Method and system for processing a plurality of multiple access
transmissions
    33.
    发明授权
    Method and system for processing a plurality of multiple access transmissions 失效
    用于处理多个多址传输的方法和系统

    公开(公告)号:US5978413A

    公开(公告)日:1999-11-02

    申请号:US518217

    申请日:1995-08-28

    申请人: Paul E. Bender

    发明人: Paul E. Bender

    CPC分类号: H04B1/71075

    摘要: A method and system incorporating the use of interference cancellation during synchronized demodulation of a code division multiple access (CDMA) signal is described. A wireless communications receiver uses synchronized demodulation techniques to estimate the data contained in multiple orthogonal sub-channels of multiple CDMA signals. In response to these estimates an ideal waveform is constructed for each CDMA signal. These ideal waveforms are subtracted from the original signal received to form an interference-cancelled version of the original signal which is used when demodulating individual orthogonal sub-channels.

    摘要翻译: 描述了在码分多址(CDMA)信号的同步解调期间并入使用干扰消除的方法和系统。 无线通信接收机使用同步解调技术来估计包含在多个CDMA信号的多个正交子信道中的数据。 响应于这些估计,为每个CDMA信号构造一个理想波形。 从接收的原始信号中减去这些理想波形,以形成在解调各个正交子信道时使用的原始信号的干扰消除版本。

    Apparatus and method for adding and removing a base station from a
cellular communications system
    36.
    发明授权
    Apparatus and method for adding and removing a base station from a cellular communications system 失效
    用于从蜂窝通信系统添加和移除基站的设备和方法

    公开(公告)号:US5475870A

    公开(公告)日:1995-12-12

    申请号:US304730

    申请日:1994-09-12

    摘要: An apparatus and method for adding and removing a target base station from a network of base stations, which includes base stations adjacent the target base station. The apparatus is comprised of two attenuators: a first for setting an artificial receive noise power level and a second for setting a transmit level. The transmit level determines the forward link coverage area of the base station. The artificial noise level sets the reverse link coverage area of the base station. When a base station is added, initially the transmit power is low and the artificial receive noise power is high such that the forward and reverse link coverage areas are collocated in close proximity to the base station. As the base station blossoms into full operation, the artificial receive noise power is decreased and the transmit level is increased such that the two coverage areas of the base station remain balanced as the coverage areas expand. When a base station is to be removed from a system, the same attenuators are used to wilt the two coverage areas in unison as the power level transmitted from the base station decreases.

    摘要翻译: 一种用于从包括与所述目标基站相邻的基站的基站网络中添加和去除目标基站的装置和方法。 该装置包括两个衰减器:第一个用于设置人造接收噪声功率电平,另一个用于设置发射电平。 发送电平确定基站的前向链路覆盖区域。 人造噪声电平设置基站的反向链路覆盖区域。 当添加基站时,最初的发射功率低,并且人为接收噪声功率较高,使得前向链路覆盖区域和反向链路覆盖区域在基站附近并置。 随着基站开始全面运行,人造接收噪声功率降低,发射等级增加,使得基站的两个覆盖区域随着覆盖区域的扩大而保持平衡。 当要从系统中移除基站时,由于从基站传输的功率电平减小,所以使用相同的衰减器来一致地使两个覆盖区域下降。

    3-Alkyl xanthene compounds
    40.
    发明授权
    3-Alkyl xanthene compounds 失效
    3-烷基呫吨化合物

    公开(公告)号:US3931232A

    公开(公告)日:1976-01-06

    申请号:US482049

    申请日:1974-06-24

    IPC分类号: C07D311/82 C07D311/80

    CPC分类号: C07D311/82

    摘要: The compounds of this invention are 3-alkyl xanthenes having pharmacological activity such as central nervous system activity. Preferred compounds of this invention are 3-(1,2-dimethylheptyl)-5,6,7,8-tetrahydro-1-hydroxy-9-methylxanthene, 3-(1,2-dimethylheptyl)-1-hydroxy-6,9-dimethylxanthene and 3-(1,2-dimethylheptyl)-1-hydroxy-9-methylxanthene.

    摘要翻译: 本发明化合物是具有中枢神经系统活性等药理活性的3-烷基呫吨酮。 本发明优选的化合物是3-(1,2-二甲基庚基)-5,6,7,8-四氢-1-羟基-9-甲基呫吨,3-(1,2-二甲基庚基)-1-羟基-6, 9-二甲基呫吨及3-(1,2-二甲基庚基)-1-羟基-9-甲基呫吨。