Patent ID: 9119135
Filing Date: 2015-08-25
Classification: H04W

Abstract:
1. A method, comprising: receiving, in a user terminal, at least one signal from a public base station and at least one signal from a private base station, each of the signals carrying information pertaining to propagation delay depending on a location of the user terminal; processing, in the user terminal, the at least one signal from the public base station and the at least one signal from the private base station for providing data as a system frame number measurement related to the location while the user terminal is in a cell of a private base station; and saving, in the user terminal, the data related to the location as a reference data of an accessible private base station; wherein the system frame number measurement determines an observed time difference using chip-level timing that depends on a timing of sequences of descrambling pseudo-noise used for each of the signals; and wherein the observed time difference using chip-level timing that depends on a timing of sequences of descrambling pseudo-noise used for each of the signals is compared to a known location of the public base station to check whether the private base station resides in a cell of the public base station.