Patent ID: 9271248
Filing Date: 2016-02-23
CPC Classification: H04W

Claim Text:
1. A method for frequency and timing synchronization by a femto access point (FAP), comprising: establishing, by a processor of the FAP, an out-of-band (OOB) link between the FAP and at least one user equipment (UE), wherein the at least one UE is being serviced by a network entity macro base station other than the FAP; receiving aiding parameters from the at least one UE via the OOB link; and in response to the at least one UE being in a CELL_DCH state or a CELL_FACH state, sniffing, by the FAP, at least one uplink packet directed from the at least one UE to the network entity macro base station at least by extracting frequency and timing information from the at least one uplink packet of the at least one UE based at least in part on the aiding parameters.