Combining characteristics of mobile database technologies with traditional duplication methods of distributed databases , b - adr solution realizes the bi - asynchronism data replication between mobile clients and servers with sql server transaction - logs - tables and data broadcasting technologies . there are two links in this solution . as for the up link , it replicates from mobile clients to servers by sql server transaction - logs - tables B - adr將傳統(tǒng)分布式系統(tǒng)的數(shù)據(jù)復制方法與移動數(shù)據(jù)庫系統(tǒng)的特點相結合,利用基于分布式關系數(shù)據(jù)庫的事務日志表和數(shù)據(jù)廣播技術,來實現(xiàn)移動客戶端和服務器端后臺數(shù)據(jù)庫系統(tǒng)間的雙向異步復制。