A network synchornization company, Symmetricom, proposed a solution to the recent claims of interference by new technology from LightSquared. The company plans to launch a nationwide LTE network using existing L-band satellite spectrum, which may cause problems for first responders, as well as anyone using GPS. Other options such as installing filters and moving GPS antennas have been considered, but Symmetricom recommends using a packet-based primary-reference source synchronization solution (PRS), such as its Time Provider 1500 product, which uses utilizes IEEE 1588 Precision Time Protocol (PTP).
Because GPS is not required at Packet PRS locations to ensure accurate timing, Symmetricom believes the solution will completely eliminate any interference. Time Division Duplexing (TDS) has formerly been the standard for synchronizing networks, but networks migrating to ethernet has "broken the chain of synchronization," and requires implementing real-time clocks to sync.
To read more about Symmetricom's proposed solution, see last week's Urgent Communications article.
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