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1. 发明授权

US07889663B1 Evaluation of handoff in wireless networks using emulation 有权
标题翻译：使用仿真评估无线网络中的切换
公开(公告)号：US07889663B1
公开(公告)日：2011-02-15
申请号：US11179884
申请日：2005-07-12
申请人： Charles R. Wright , Fanny I. Mlinarsky , John E. Ziegler
发明人： Charles R. Wright , Fanny I. Mlinarsky , John E. Ziegler
IPC分类号： H04W28/00
CPC分类号： H04W24/06 , H04W36/30 , H04W84/12
摘要： Test equipment operable to evaluate handoff in wireless networks can be configured as an infrastructure test system or a client mobility test system. The infrastructure test system includes a plurality of client emulating devices and a client motion emulator for testing real access points. Each client emulating device is operable to emulate multiple individual virtual mobile devices (“virtual mobile devices”). The client motion emulator computes a mathematical representation of the modeled network and motion of virtual mobile devices in that network. The client motion emulator employs the mathematical representation to calculate path loss between virtual mobile devices and the real access points in the modeled network. The calculated path loss information is transmitted to the virtual mobile devices. Path loss of communications from a virtual mobile device to an access point is implemented via a programmable attenuator.
摘要翻译：可用于评估无线网络切换的测试设备可以配置为基础设施测试系统或客户端移动性测试系统。基础设施测试系统包括多个客户端仿真设备和用于测试实际接入点的客户端运动仿真器。每个客户端仿真设备可操作以模拟多个单独的虚拟移动设备（“虚拟移动设备”）。客户运动仿真器计算建模网络的数学表示和该网络中的虚拟移动设备的运动。客户端运动仿真器采用数学表示来计算虚拟移动设备与建模网络中的实际接入点之间的路径损耗。所计算的路径损耗信息被发送到虚拟移动设备。通过可编程衰减器实现从虚拟移动设备到接入点的通信路径损耗。

2. 发明授权

US08116758B2 Simulating time-varying conditions in a wireless network 有权
标题翻译：模拟无线网络中的时变条件
公开(公告)号：US08116758B2
公开(公告)日：2012-02-14
申请号：US12501852
申请日：2009-07-13
申请人： Fanny I. Mlinarsky , John E. Ziegler , Raymond Cronin , Jeremy Spilman
发明人： Fanny I. Mlinarsky , John E. Ziegler , Raymond Cronin , Jeremy Spilman
IPC分类号： H04W24/00
CPC分类号： H04W24/00 , H04W24/06
摘要： Time-varying conditions in a wireless network are simulated using an architecture that includes an enclosure for shielding a wireless device under test (“DUT”) from electro-magnetic interference, including other wireless devices; and at least one of: (1) a communications traffic generating device operable to generate communications traffic having selected characteristics; and (2) at least one dynamically adjustable attenuator in communication with the wireless device and the traffic generator. Embodiments of the architecture include wireless test equipment for testing operating range, roaming and capacity. The attenuator is used to adjustably attenuate signals between the device and the traffic generator over time during a test, whereby motion of the device is simulated. By connecting multiple access points, each associated with a dynamically adjustable attenuator, it is possible to force the DUT to roam between access points. The communications traffic generating device can be used to vary traffic over time during a test in order to test capacity, prioritization and admission control. For example, the communications traffic generator may include phone and data client emulators which simulate different traffic types that can be independently varied over time during a test.
摘要翻译：无线网络中的时变条件是使用包括用于屏蔽被测无线设备（“DUT”）的电磁干扰包括其他无线设备在内的架构来模拟的; 和（1）可操作以产生具有所选特征的通信业务的通信业务生成设备中的至少一个; 和（2）与所述无线设备和所述业务发生器通信的至少一个动态可调衰减器。该架构的实施例包括用于测试操作范围，漫游和容量的无线测试设备。衰减器用于在测试期间随时间推移在装置和交通发生器之间可调节地衰减信号，由此模拟装置的运动。通过连接多个接入点，每个接入点与动态可调衰减器相关联，可以迫使DUT在接入点之间漫游。通信业务生成设备可以用于在测试期间随时间改变流量，以便测试容量，优先级和接纳控制。例如，通信业务生成器可以包括电话和数据客户端仿真器，其模拟在测试期间随时间独立地变化的不同业务类型。

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