Method of synchronization within an LTE/LTE-A system in unlicensed spectrum

An apparatus for wireless communication, comprising:

• means for receiving, at a first base station, at least one clear channel assessment (CCA)-exempt transmission (CET) indicating timing information of at least a second base station over a shared spectrum, wherein each of the at least one CETs is received in one of a plurality of operator-specific portions of a CET period, each of the operator-specific portions is assigned to one of a plurality of operators in the shared spectrum, and the plurality of operators comprises an operator associated with the second base station;
• and
• means for adjusting a timing of the first base station based on the received timing information of at least the second base station.

A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

• receive, at a first base station, at least one clear channel assessment (CCA)-exempt transmission (CET) indicating timing information of at least a second base station over a shared spectrum, wherein each of the at least one CETs is received in one of a plurality of operator-specific portions of a CET period, each of the operator-specific portions is assigned to one of a plurality of operators in the shared spectrum, and the plurality of operators comprises an operator associated with the second base station;
• and
• adjust a timing of the first base station based on the received timing information of at least the second base station.