The invention discloses a system and method for allowing a position receiver to determine a position solution in a positioning signal from a plurality of self-positioning networks, wherein each of the plurality of self-positioning networks is synchronized with different time bases. Each of the plurality of self-positioning networks comprises one or more positioning unit device apparatuses. At least one positioning unit device apparatus of the first self-positioning network receives the positioning signal from at least one positioning unit device apparatus of the second adjacent self-positioning network, measures the time base difference between the first self-positioning network and the second self-positioning network, and then calculates the clock correction of time base. The clock correction of time base is contained in the positioning signal by the at least one positioning unit device apparatus of the first self-positioning network, and the transmission is carried out.