Xixlan Chen

Title: Xixlan Chen and a Patent for Wireless Frame Determination

Introduction

Xixlan Chen is an inventor associated with Nepean, Canada, and Nortel Networks Corporation. His patent work includes a method for distinguishing among received communication frames and determining a system’s transmission rate.

Latest Patents

Chen is credited with 1 patent: “Method for Determination of Discontinuous Transmission, Frame Erasure, and Rate.” The invention uses a metric derived from the log-likelihood ratios (LLRs) of a received frame. It calculates the mean LLR and compares the result with a threshold.

When the frame’s CRC indicates successful recovery and the metric exceeds the threshold, the frame is classified as a continuous-transmission (CONT) frame. If the metric falls below the threshold, the frame is classified as a discontinuous-transmission (DTX) frame. If the CRC indicates failure while the metric exceeds the threshold, the frame is classified as an erasure.

The method can also use the mean absolute LLR to determine transmission rate. It decodes a voice frame at each available rate and selects the rate associated with a passed CRC and the highest metric.

Career Highlights

Chen’s listed company affiliation is Nortel Networks Corporation. His patent addresses frame classification and rate selection in wireless communications, using LLR-based measurements alongside CRC results.

Collaborations

Guoqiang Xue is identified as Chen’s coworker. The available information does not specify the nature of their collaboration or whether they worked together on this patent.

Conclusion

Xixlan Chen’s patent presents an LLR-based approach to identifying frame types and selecting transmission rates, contributing a defined method for wireless communication systems.