| 摘要 |
Variations 1 in the offset between the start of a specified timeslot, allocated to a mobile station, and the receipt of a signal burst from that mobile station are monitored and the value of a statistical function, such as an average, related to the distribution of the burst about the centre of the timeslot is derived 2. This operation is repeated for other mobile stations linked to the base station and the mobile stations are then grouped 6 according to the ranges into which their statistical functions lie. A common carrier signal is assigned to the mobile stations within a group so that the base station can communicate with the mobile stations on a group basis, thereby enabling guard times to be reduced for mobiles of a similar distance from the base station. Weighted averages may be used for more accurate approximations of the offset time at any instant, whilst standard deviations may be used to assess their reliablility 3. |
