Abstract: Systems and methods enabling the efficient and repeatable simulation of mobility, during performance measurements of wireless data communications equipment are described. These are particularly useful for testing the impact on performance of spatial separation between Wireless Local Area Network (WLAN) devices, clients, relative to their counterparts, access points. In accordance with one or more embodiments of the present invention, the controlled emulation of spatial distance effects by injecting impairments into the transmitted and received wireless data packet streams are disclosed to simulate the impact of distance on properties of signal level, signal to noise ratio, and frame error ratio. Injection of impairments may be accomplished by varying the transmit power, artificially inducing errors into transmitted frames, and withholding acknowledgements for otherwise valid received frames, at levels consonant with the amount of distance to be emulated.

Abstract: Systems and methods are disclosed herein to provide communication testing for wireless or wired packet data communication devices, systems, and networks. In accordance with one embodiment of the present invention, a test system containing a multilevel scheduler is disclosed that includes cascaded schedulers, a software interface, and specific media protocol feedback to accurately emulate multiple clients on a network, with possibly numerous traffic flows per client. Such a test system may offer capabilities such as a more accurate emulation of client contention and collisions, a more accurate emulation of bandwidth sharing between clients, and a more accurate emulation of traffic flow multiplexing between flows.

Abstract: Systems and methods are disclosed herein to provide communication testing for wireless or wired packet data communication devices, systems, and networks. In accordance with one embodiment of the present invention, a test system containing a multilevel scheduler is disclosed that includes cascaded schedulers, a software interface, and specific media protocol feedback to accurately emulate multiple clients on a network, with possibly numerous traffic flows per client. Such a test system may offer capabilities such as a more accurate emulation of client contention and collisions, a more accurate emulation of bandwidth sharing between clients, and a more accurate emulation of traffic flow multiplexing between flows.

Abstract: Systems and methods enabling the efficient and repeatable simulation of mobility, during performance measurements of wireless data communications equipment are described. These are particularly useful for testing the impact on performance of spatial separation between Wireless Local Area Network (WLAN) devices, such as clients, relative to their counterparts, such as access points. For example, in accordance with one or more embodiments of the present invention, the controlled emulation of spatial distance effects by injecting impairments into the transmitted and received wireless data packet streams are disclosed to simulate the impact of distance on properties such as signal level, signal to noise ratio, and frame error ratio. Injection of impairments may be accomplished by varying the transmit power, artificially inducing errors into transmitted frames, and withholding acknowledgements for otherwise valid received frames, at levels consonant with the amount of distance to be emulated.