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Multi-interface WiMAX R1 protocol analysis with Tektronix G35 and WaveJudge 4800

Posted: 02 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:air-interface verification? MAC? PHY? mobile WiMAX?

Verifying the correct function of the air-interface is a key issue in any type of base station testing. In the case of Mobile WiMAX, test engineers must not only be able to analyze the PHY and medium access control (MAC) layers of the R1 interface, but also all MAC Management messages specified in IEEE 802.16e, that is, the control-plane messages exchanged between the mobile station and the base station.

Test engineers are able to analyze multiple layers of the air-interface by using appropriate monitoring devices such as the WaveJudge from Sanjole. However, real-time monitoring is not available yet in the market due to the large gap between capturing traffic and actually decoding it.

Since storage space for captured I/Q samples is also limited, it is a challenge for test engineers to trigger the R1 I/Q sample processing for just the WiMAX procedure of interest.

As outlined in this solution note, combining the G35 protocol analyzer with the WaveJudge air-interface sniffer provides the ideal solution to solve this �synchronization? issue. Additionally, by decoding air-interface traffic provided via a BS mirror port, the G35 is able to compare traffic decoded by the air-interface sniffer with traffic actually received at the BS and may detect PHY layer issues which would go undetected when using only a BS mirror port for monitoring.

View the PDF document for more information.

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