METHOD AND APPARATUS FOR POWER SAVING IN GLOBAL NAVIGATION SATELLITE SYSTME (GNSS) RECEIVERS

摘要

Methods and apparatus are provided for power saving in GNSS receivers. In one novel aspect, the ME tracking period, the ME interval, and the PE working period, the PE interval are dynamically determined based on the GNSS signal conditions and/or the user requirements. In one embodiment, acceptable provision estimated position fix are used. Estimated position result is generated at each GPS position interval if there is no position result generated by the PE working period. In another embodiment, the ME-tracking and/or the PE-working are adjusted to minimum operation needs by using ME-partial (MEP) and/or PE-partial (PEP). PEP is arranged aligned with MEP. In yet another embodiment, the PE working period is delayed such that the PE working period is aligned with the ME tracking period. The position result is generated based on a last epoch's measurement obtained in the previous ME tracking period.

主权项

1. A method, comprising:
monitoring a set of global navigation satellite system (GNSS) signal conditions by a GNSS receiver in a wireless network; obtaining a set of GNSS user requirements; determining a monitoring engine (ME) tracking period and an ME interval based on at least one of the GNSS signal conditions and the user GNSS requirements, wherein the GNSS receiver performs signal processing in the ME tracking period and stays idle during the rest of the ME interval; determining a positioning engine (PE) working period and a PE interval based on at least one of the GNSS signal conditions and the user GNSS requirements, wherein the GNSS receiver performs a position calculation in the PE working period and stays idle during the rest of the PE interval; and generating a position result at an end of the PE working period.