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    • 2. 发明授权
    • Dynamic frequency hopping
    • 动态跳频
    • US06501785B1
    • 2002-12-31
    • US09472784
    • 1999-12-28
    • Li Fung ChangKapil K. ChawlaJustin C. ChuangZoran KosticNelson SollenbergerXiaoxin Qiu
    • Li Fung ChangKapil K. ChawlaJustin C. ChuangZoran KosticNelson SollenbergerXiaoxin Qiu
    • H04J1306
    • H04W16/10H04B7/2621
    • This invention provides a dynamic frequency hopping system that utilizes information from multiple base stations. The system assigns frequency hopping patterns based on current interference and traffic environments to avoid interference thus gaining the benefits of interference averaging and interference avoidance. The system imposes less stringent measurement requirements on terminals (wireless mobile devices) because many measurement requirements are replaced by generating estimates based on measurement data received from other base stations within a base station neighborhood. The system may continuously verify that the frequency hopping patterns assigned to the links of the system optimizes system performance. The system compares system performance of possible frequency hopping patterns against currently assigned frequency hopping pattern to optimize system performance. When a request for a link is received, a similar process as above is performed where the request is granted/denied/delayed based on system optimization requirements. In this way, the frequency hopping patterns of the links of the system may be assigned so that an optimum system performance may be obtained.
    • 本发明提供了利用来自多个基站的信息的动态跳频系统。 该系统基于当前的干扰和业务环境分配跳频模式,以避免干扰,从而获得干扰平均和干扰避免的好处。 该系统对终端(无线移动设备)施加较不严格的测量要求,因为通过基于从基站附近的其他基站接收的测量数据生成估计来代替许多测量要求。 系统可以连续验证分配给系统的链路的跳频模式优化系统性能。 该系统将可能的跳频模式的系统性能与当前分配的跳频模式进行比较,以优化系统性能。 当接收到链接的请求时,执行与根据系统优化要求授予/拒绝/延迟请求的类似的过程。 以这种方式,可以分配系统的链路的跳频模式,使得可以获得最佳的系统性能。
    • 8. 发明授权
    • Method and apparatus for implementing measurement based dynamic frequency hopping in wireless communication systems
    • 用于在无线通信系统中实现基于测量的动态跳频的方法和装置
    • US06549784B1
    • 2003-04-15
    • US09312279
    • 1999-05-14
    • Zoran KosticNelson Ray Sollenberger
    • Zoran KosticNelson Ray Sollenberger
    • H04B701
    • H04B1/715H04B2001/7154H04L5/023
    • Proposed is a method and apparatus for reducing interference in a frequency hopping wireless communications system. In one embodiment of the present invention, a base station and a terminal station each using an orthogonal frequency division multiplexing (OFDM) technique to simultaneously measure an interference level for each system frequency and to enable high speed frequency hop pattern changes which can follow changes in desired and interfering signal levels due to changes in co-channel interference or shadow fading. The terminal station interference level measurement values are then transmitted to the base station. Next, the base station identifies each frequency hop pattern currently in use by each terminal station communicating with that base station. The base station then uses both the base station interference level measurements and the terminal station interference level measurements to identify each frequency hop pattern in which at least one of the current system frequencies should be replaced with a system frequency having a lower interference level. Next, the base station replaces no more than a predetermined number of the current system frequencies within the identified frequency hop pattern(s). The above steps are executed at each base station within the system while ensuring that nearby interfering base stations do not replace frequencies at the same time.
    • 提出了一种用于减少跳频无线通信系统中的干扰的方法和装置。 在本发明的一个实施例中,一个基站和一个终端站,每个基站和终端站都使用正交频分复用(OFDM)技术来同时测量每个系统频率的干扰电平,并实现能够跟随变化的高速跳频模式改变 由于同频道干扰或阴影衰落的变化而导致的期望和干扰信号电平。 然后将终端干扰电平测量值发送到基站。 接下来,基站识别与该基站通信的每个终端当前正在使用的每个频率跳频模式。 基站然后使用基站干扰电平测量和终端干扰电平测量两者来识别其中至少一个当前系统频率应被具有较低干扰电平的系统频率替代的每个频率跳频模式。 接下来,基站在所识别的频率跳频模式中替换不超过预定数量的当前系统频率。 上述步骤在系统内的每个基站执行,同时确保附近的干扰基站不同时替换频率。