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    • 2. 发明授权
    • Method and system for controlling access of a subscriber station to a wireless system
    • 用于控制用户台到无线系统的接入的方法和系统
    • US06944449B1
    • 2005-09-13
    • US09580648
    • 2000-05-30
    • Asif Dawoodi GandhiJoe HuangMarc Benedict IbanezLei SongMathew ThomasStanley Vitebsky
    • Asif Dawoodi GandhiJoe HuangMarc Benedict IbanezLei SongMathew ThomasStanley Vitebsky
    • H04W72/08H04Q7/38
    • H04W72/085
    • A method for controlling access of a subscriber station to a wireless communications system facilitates the maintenance of a performance target of the reverse link and desired geographic coverage of the reverse link. The method for controlling access of a subscriber station to a wireless communications system includes measuring a first performance indicator and a second performance indicator for a reverse link associated with a subscriber station seeking access to a wireless communications system. A blocking threshold value is established based upon the measured second performance indicator and may be adjusted to allow more or less blocking based on any additional metrics that characterize the performance of the current subscriber stations. The decision to grant or deny access of the subscriber station to the wireless communications system is determined based on a comparison of the measured first performance indicator to the established blocking threshold value.
    • 用于控制用户台对无线通信系统的接入的方法有助于维护反向链路的性能目标和反向链路的所需地理覆盖。 用于控制用户站对无线通信系统的接入的方法包括测量与寻求接入无线通信系统的用户站相关联的反向链路的第一性能指示符和第二性能指示符。 基于测量的第二性能指标建立阻塞阈值,并且可以基于表征当前用户站的性能的任何附加度量来调整以允许更多或更少的阻塞。 基于所测量的第一性能指示符与建立的阻塞阈值的比较来确定向用户站授予或拒绝对无线通信系统的访问的决定。
    • 3. 发明授权
    • Methods and apparatus for enhanced soft handoff in a CDMA wireless communication system
    • CDMA无线通信系统中增强软切换的方法和装置
    • US06594243B1
    • 2003-07-15
    • US09354220
    • 1999-07-15
    • Ching Yao HuangJoe HuangI-Fong Antonio WuXiao Cheng WuBee Yun Yu
    • Ching Yao HuangJoe HuangI-Fong Antonio WuXiao Cheng WuBee Yun Yu
    • H04Q700
    • H04W36/0094H04W36/12H04W36/18
    • Soft handoffs in an IS-95 CDMA system or other wireless communication system are controlled using an enhanced set of soft handoff parameters which allow the system to adapt more readily to changing radio frequency (RF) conditions. In an illustrative embodiment, values for particular ones of the soft handoff parameters are selected in accordance with a set of rules, including rules such as, e.g., select the minimum value of add threshold among the members of an active set of pilots for a given mobile station; select the maximum value of drop threshold among the members of the active set; select the minimum value of drop threshold timer among the members of the active set; and select the minimum value of comparison threshold among the members of the active set. A quality measure is then determined for each of the members of the active set, based on one or more of the selected soft handoff parameter values and values of one or more additional parameters, e.g., add intercept, drop intercept and slope parameters, associated with those members. Particular values of the additional parameters are then selected based on the quality measures. The selected parameter values are then utilized in a soft handoff process, e.g., in a soft handoff process in which the given mobile station is directed to handoff from a primary base station to another base station of the system.
    • 使用增强的一组软切换参数来控制IS-95 CDMA系统或其他无线通信系统中的软切换,这使得系统能够更容易地适应变化的射频(RF)条件。 在说明性实施例中,根据一组规则来选择软切换参数中的特定软值切换参数的值,包括诸如例如在给定的一组有效的飞行员组的成员中选择加法阈值的最小值的规则 移动台 选择活动集成员中下降阈值的最大值; 在活动集成员中选择丢弃阈值定时器的最小值; 并在活动集的成员中选择比较阈值的最小值。 然后,基于所选择的一个或多个软切换参数值和一个或多个附加参数的值(例如,添加截距,下降截距和斜率参数)来确定活动集的每个成员的质量度量 那些成员。 然后根据质量度量选择附加参数的特定值。 所选择的参数值然后在软切换过程中使用,例如在软切换过程中,其中给定移动台被指向从主基站切换到系统的另一个基站。