To enable widespread broadband data services adoption and drive higher data ARPU, mobile and wireless operators must offer data services that are fast, consistent and available wherever their subscribers are located.  To improve return on infrastructure and spectrum investments, operators also must find ways to serve more subscribers and carry more data across their existing networks.

Venturi Wireless makes both objectives possible through a breakthrough optimization solution that uniquely addresses the challenges inherent in wireless data transport.

Venturi’s Adaptive Airlink Optimization™ is a cross-layer technology that integrates transport layer optimization ─ in the form of the Venturi Transport Protocol (VTP) ─ with Smart Compression technology to provide unmatched improvements in connection speeds, application consistency, coverage availability and network efficiency.

Transport Optimization versus Compression
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.

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.

Transport optimization improves the performance of 2.5G, 3G and 4G networks. While 3G and 4G networks offer a larger “pipe” for data than 2.5G networks, 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, transport optimization contributes a greater proportion of overall optimization benefit.  In 3G networks, for example, transport optimization contributes to a 50 - 75% performance improvement when compared to compression only.

Adaptive Airlink Optimization™ Adaptive Airlink Optimization is at the core of the Mobile Operator Solution. It transparently replaces TCP over the airlink with the patented Venturi Transport Protocol (VTP), which was specifically designed to overcome the inefficiencies related to wireless data transport. VTP optimizes TCP-based applications, including Web, streaming video and audio, email, enterprise applications and file transfer. Adaptive Airlink Optimization offers wireless carriers a range of benefits: Superior Performance Adaptive Airlink Optimization boosts performance by adapting packet rate transmission on a session-by-session basis so that data can be transmitted at the fully available network speed.  Venturi’s Smart Compression applies best of breed compression technology to yield unmatched performance enhancement. Enhanced Coverage With Venturi, users benefit from high, consistent performance in all types of RF conditions. In contrast, TCP allows data throughput speeds to drop much more dramatically in areas with poor signal quality, as shown below.

Improved Consistency Under poor RF conditions, Venturi users experience far fewer dropped sessions and connection time-outs, since VTP avoids TCP congestion control reactions that cause high latency and back-offs. Greater Network Efficiency By eliminating unnecessary data retransmissions and shortening connection times, Adaptive Airlink Optimization more efficiently utilizes network bandwidth. Smart Compression   Venturi’s Smart Compression technology utilizes content-specific compression techniques to significantly reduce network traffic and maximize data transmission speeds. Venturi delivers superior file size reduction by utilizing specialized compressors for different object types, including JPEG2000, JPEG, GIF and PNG. Venturi compresses the broadest range of applications and protocols including: Web and secure Web (HTTP, HTTPS), email (SMTP, POP3, IMAP4), images (GIF, JPEG, PNG, etc.), office documents (MS Word, MS Excel, MS PowerPoint, PDF), Web applications (JavaScript, CGI) and FTP.