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LTE protocol stack tailored for Android

Posted: 09 Jun 2010     Print Version  Bookmark and Share

Keywords:LTE protocol stack  software  Android  4G 

From MIPS Technologies Inc. and SySDSoft Inc. comes what they tout is the first LTE protocol stack ported to the Android platform. Benchmarks of the SySDSoft LTE protocol stack running on MIPS-based Android and Linux platforms achieved nearly theoretical maximum CAT4 data throughput with small packet sizes, low CPU operating frequency and low power.

The results demonstrate the efficiency of the MIPS Technologies architecture for 4G mobile handsets. With higher upload/download throughput and similar or better performance compared to the competitive solution running at 500MHz, these are believed to be the highest-performance results for such small packet sizes running on a 350MHz core.

"As LTE gains traction in mobile handsets, Android will become increasingly important, and the processors driving those systems must be powerful enough to run the entire software stack and applications on a single processor," said Khaled Ismail, CEO, SySDSoft. "With these benchmarks, we've clearly shown the benefits of the MIPS architecture in terms of data compression, performance and channel utilisation for Android at 4G. The combination of MIPS Technologies' high-performance, power-efficient architecture and SySDSoft's optimised LTE UE stack (L2-L3-NAS) is an extremely powerful yet efficient solution for future LTE multi-mode handsets."

SySDSoft's LTE UE software stack was tested with both Linux and Android OS on a MIPS-based chipset featuring a 350MHz MIPS32 24Kf CPU core. The benchmark tested packets of various sizes using an eNodeB emulator to demonstrate achieved UE performance complying with CAT4 requirements. Results showed 150Mbit/s download (DL) and 50Mbit/s upload (UL) data rates for packets as small as 256 bytes. For 128byte packets, results showed throughput of around 100Mbit/s DL and 50Mbit/s UL thus achieving CAT3 even under such stringent conditions.

The benchmarks demonstrate high performance with minimal processor MIPS consumption, averaging 95 MIPS. This performance was achieved on both Linux and Android without any code changes between the operating systems—demonstrating the versatility of the LTE UE stack architecture.

- Toni McConnel

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