| 摘要 |
In a TDMA cellular communication network, one of the cell sites (2) is a reference station (2) for establishing a time reference in response to a timing signal from a mobile switching office (1), and each of the other cell sites (3) is a subordinate station (3). Each subordinate station (3) establishes a time slot in response to the timing signal from the mobile switching system and receives a signal from a mobile station (5) located in the area of the reference station (2) for detecting a time lapse between the time slot and the signal from the mobile station (5). A delay time is introduced to the time slot according to the time lapse so that the time slot is synchronized to the time reference of the reference station (2). In a second embodiment, each subordinate station (3) transmits a signal indicative of the detected time lapse to the mobile switching system, where a delay time value is derived from those signals received from a chain of subordinate stations (3) and returned to each subordinate station (3) for performing the time slot adjustment. The delay time value is a modulo tau summation of the time lapses received from such chain of subordinate stations (3), where tau is the duration of the time slot. <IMAGE> |
