位置区（LA）是指移动通信系统中一组小区（Cell）的集合，是移动台（或手机）移动性管理的一个重要组成部分。
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结果表明：位置区的最佳大小与用户的平均呼叫到达时间无关。
The results indicate that there is no correlation between the best size of the location area and the arrived time for user's average call.
本发明同时还公开了一 种异构网络切换中获取位置区信息的装置和系统。
The invention also discloses adevice and a system for acquiring the position area information during switching the heterogeneous networks.
而且当列车上的移动用户数目以及用户旅途中穿越的位置区数目增加时，此方案的优越性更加显著。
As either the number of users in a train or the number of location areas through which a user travels increases, the superiority of this scheme increases.
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