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Venturi Transport Optimization (VTO)

Because of their latency, high packet loss and variable bandwidth, wireless networks offer a less than optimal physical environment for TCP, the transport protocol upon which most Internet applications are built. TCP typically reacts to common wireless network conditions by generating heavy and erratic traffic flow, resulting in inefficient utilization of the available bandwidth.

Variable radio frequency (RF) conditions can significantly impact the behavior of TCP over wireless networks. In areas with poor signal quality, interference and/or high load conditions, a subscriber’s performance often degrades dramatically. As a result, mobile data users frequently experience throughput speeds that are a fraction of the bandwidth available to them. Users also confront inconsistent performance in different locations or at different times of the day as network conditions fluctuate.

Solutions that primarily utilize compression technologies to increase wireless connection speeds do not solve the wireless network problems of high latency, high packet loss and variable bandwidth. While compression reduces the volume of data transmitted, it does not improve the efficiency of data transport over wireless networks.

Comparison of Application Response Times (EV-DO Network)

As shown in the chart, Venturi optimization technology offers application response times superior to compression-only solutions.

 

Venturi Transport Optimization improves network performance. While newer technology networks offer a larger "pipe" for data, they still do not provide an ideal environment for data transport. In fact, application efficiency is lower in 3G+ networks, since the effective throughput is much less than the available bandwidth. As network sophistication increases, venturi transport optimization contributes a greater proportion of overall optimization benefit.