Sierra Wireless, Inc.
Method and apparatus for time advance validation using reference signal received power

Abstract:

There is provided a method and user equipment that enable the evaluation of the validity of a timing advance known to a UE for enabling the UE to transmit using preconfigured uplink resources (PUR). The method includes receiving data enabling determination of a measured change in a reference signal received power by a UE. The UE subsequently determines if the measured change in the RSRP is less than a positive change threshold. If the determination is true, the UE proceeds with the transmission using PUR. In some embodiments, prior to proceeding with the transmission, the UE further evaluates or determines if the measured change in the RSRP is greater than a negative change threshold. The UE will subsequently use PUR for the transmission only if the measured change in the RSRP is greater than a negative change threshold.