| 摘要 |
System and method for optimally updating a neighbor set for use by a mobile unit during soft handoff of the mobile unit in a CDMA cellular telephone environment is disclosed. A two-step process is used to ensure tha t the individual neighbor sets of active set members are combined in a manner such that only pilots representing the more important sectors are included i n the updated neighbor set and pilots representing the less important sectors are excluded therefrom. In the first step, active set members whose RTD is more than twice as great as an OWD threshold are eliminated from consideration. In the second step, the neighbor set of the mobile unit is updated using the sectors included in the individual neighbor sets of the active set members t hat were not excluded by the first step, wherein those sectors are included in t he updated neighbor set according to the number of individual sets in which the y are found and their priority within those sets. In an alternative embodiment , a combined carrier-to-interference ratio for each of the individual neighbor s et members is also used in updating the neighbor set. In an alternative embodiment, the individual neighbor set of the active set member having the shortest RTD is used as the updated neighbor set.
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